PHYSICS WITH LHC EARLY DATA

Size: px
Start display at page:

Download "PHYSICS WITH LHC EARLY DATA"

Transcription

1 PHYSICS WITH LHC EARLY DATA ONE OF THE LAST PROPHETIC TALKS ON THIS SUBJECT HOPEFULLY We may have some two month of the Machine operation in 2008 LONG HISTORY... I will extensively use: Fabiola GIANOTTI CERN, ATLAS 2004 Wouter VERKERKE NIKHEF, AOW Paris 2005 Fabiola GIANOTTI CERN, ATLAS / /9/9/332 Fabrice HUBAUT CPPM/IN2P3, ATLAS & CMS I lepsza referencja Pamela FERRARI ATLAS & CMS asxiv hep ex v2 Albrert De ROECK CERN, KITF Seminar, 1 Apr 2008 Anna KACZMARSKA IFJ PAN Institute Seminar 16 Feb / 34

2 2 / 34

3 3 / 34

4 4 / 34

5 What energy at the start? 900 GeV 10 TeV 12 TeV 14 TeV 5 / 34

6 Peter Jenni ATLAS Coll. Meeting 7 Apr. 08 LHC machine status and schedule A rather extensive meeting took place on 3rd March between the DG R Aymar, J Engelen and ATLAS represented by M Nessi and PJ During this meeting we were informed about the machine status, we had a chance to explain our schedule, and to give input to the LHC start-up strategy discussions The main conclusions, which are still valid, were: - The current planning of the LHC is such that the machine is expected to be cold by by mid-june, and first injections could start soon after, from end June onwards - CERN Management will give ATLAS a warning signal 2 months before we have to start closing, currently expected by mid-april (around RRB) when the progress on the machine will be known from the cooldown status of further sectors - Experience from power tests in Sector 4-5 showed that several magnets need training, starting somewhere above 5 TeV equivalent - The first physics run (typically 2 months) in 2008 will be at 10 TeV (or slightly above), the energy will be defined in April when experience from Sector 5-6 will also be available Similar statements were also made during this Council Week, in addition it was said that 10 TeV collisions could be reached sometime in August 6 / 34

7 One can follow cooling states of sectors almost on line that must take still some time 7 / 34

8 8 / 34

9 Some LHC parameters COLLISION ENERGY INJECTION ENERGY PROTONS PER BUNCH NUMBER OF BUNCHES NOMINAL BUNCH SPACING NOMINAL LUMINOSITY REVOLUTION TIME (REVOLUTION FREQUENCY STORED BEAM ENERGY BUNCH LENGTH LUMINOSITY LIFETIME ACCELERATION TIME BEAM RMS at IP 450GeV/7TeV 7 TeV 450 GeV ns 34 cm-2s µs khz) * 336 MJ 75.5 mm 10 h 20 min.375mm/16.63 µm 9 / 34

10 10 / 34

11 WHAT IS THIS ALL FOR? Flagships: Higgs searches physics beyond the SM supersymmetry extra dimensions precision physics (W, top, Higgs mass,...) b physics quark gluon plasma BUT it is NOT the first day physics. These goals and unprecedented complexity of detectors (ATLAS and CMS) require first: commissioning of detectors and triggers, first calibrations and alignment with minimum bias and QCD jet production, measure of some exclusive channels (e.g. Z > lepton lepton) to set the absolute electron and mion ECAL energy scale measure tt events to determine the absolute jet energy scale and understand b tagging in the inner detectors 11 / 34

12 Recently, prof. Peter W. Higgs has visited the ATLAS detector. Some say, that it is going to be the only Higgs seen in ATLAS 12 / 34

13 ATLAS Inner Detector: (Silicon pixels + strips +TRT particle ID (e/π ) ) B=2T, σ /pt ~ 4x10-4 pt 0.01 (e.g. H bb) Height ~ 22 m Length ~45m weight ~7000 t Muon system: (precision chambers + triggers in air core toroids B=4T mean value), σ /pt ~ 7 % at 1 TeV standalone (e.g. H,A µµ, H 4µ) Electromagnetic calorimeter : (Pb, liquid argon) σ /E ~ 10%/ E, Uniform longitudinal segmentation Provides: e/γ identification, energy and angular resolution, γ/jet, γ /π0 separation (e.g. H γγ) Hadronic Calorimeters: (Fe scint Cu-liquid argon) σ /E ~ 50%/ E 0.03 Jet, ETmiss performance (e.g. H τ τ, H bb) 13 / 34

14 14 / 34

15 15 / 34

16 business plan L= / 34

17 A solid candidate for the very early valuable result: it is enough to collect events to measure dnch/ dƞ 17 / 34

18 Considerable statistics easily vailable to study and estimate absolute scales for electron and mion ECAL measurements as well as for the absolute jet energy scale 18 / 34

19 19 / 34

20 First picks: rediscovery of the known physics to demostrate the detector understanding J/ψ µ µ 1 pb-1 After all cuts: ~ 4200 (800) J/ψ (Y) µ µ ev./day, L = 1031 Y µ µ (assume 30% efficiency of data taking) 10 pb-1 ATLAS preliminary After all cuts: ~ 160 Z µ µ ev./day at L = 1031 (assume 30% data taking efficiency) alignment of mion spectrometer, momenta calibrations for the ID and mion system, trigger optimization, test of the Kraków, 6 May 2008of mion reconstruction efficiency ATLAS preliminary 20 / 34

21 21 / 34

22 FASCINATING ROLE OF ttbar EVENTS : ONE GETS TO INTERESTING PHYSICS SIMULTANEOUSLY CALIBRATING MANY HIGHER LEVEL RECONSTRUCTION CONCEPTS SUCH AS JET ENERGY SCALES, B TAGGING AND MISSING ENERGY I have learned that from Wouter Verkerke at Paris AOW in 2005! Top production and decay at LHC LHC σ ~850 pb 10% qq, 90% gg Tevatron σ ~7 pb 85% qq, 15% gg LHC will be a top factory: 107 events already with 10 fb-1 22 / 34

23 Top physics at LHC Large ttbar production cross section at LHC sˆ = sx1 x2 ; x1 x2 ~ 10 3 gg tt σ tt( tot) = 759±100 pb Nevt ~ 700/hour qq tt Production: gluon dominated at LHC, quark dominated at Tevatron About 100 times larger than cross section at Tevatron (and lumi also) 23 / 34

24 Top topology Decay products are 2 W bosons and two b quarks. About 99.9% decays to Wb For commissioning studies consider events with one hadronic and one semi-leptonic W decay (about 30% of the total ttbar cross section 24 / 34

25 What can we learn from ttbar production? Abundant clean source of b jets 2 out of 4 jets in event are b jets O(50%) a priori purity (need to be careful with ISR and jet reconstruction) Remaining 2 jets can be kinematically identified (should form W mass) > possibility for further purification 25 / 34

26 What can we learn from ttbar production? Abundant source of W decays into light jets Invariant mass of jets should add up to well known W mass Suitable for light jet energy scale calibration (target prec. 1%) Caveat: should not use W mass in jet assignment for calibration purpose to avoid bias If (limited) b tagging is available, W jet assignment combinatorics greatly reduced 26 / 34

27 What can we learn from ttbar production? Known amount of missing energy 4 momentum of single neutrino in each event can be constrained from event kinematics Inputs in calculation: m(top) from Tevatron, b jet energy scale and lepton energy scale 27 / 34

28 How to identify ttbar events? Restrict ourselves to basic (robust) quantities Apply some simple cuts Hard pt cuts really clean up sample (ISR). Possible because of high production rate 4 hard jets (PT >40 GeV) Combined efficiency of requirements is ~5% still have ~10 evts/hour 1 hard lepton (Pt >20 GeV) Missing ET (ET >20 GeV) 28 / 34

29 Signal only distributions (Full Simulation) W CANDIDATE TOP CANDIDAT E Clear top, W mass peaks visible Background due to mis assignment of jets Masses shifted somewhat low mtop = 162.7±0.8 GeV Easier to get top assignment right than to get W assignment right m(tophad) Effect of (imperfect) energy calibration MW = 78.1±0.8 GeV L=300 pb-1 (~1 week of running) m(whad) Jet energy scale calibration possible from shift in m(w) S B S/B = / 34

30 Signal + Wjets background (Full Simulation) W CANDIDATE TOP CANDIDAT E Plots now include W+jets background Background level roughly triples Signal still well visible Caveat: bkg. cross section quite uncertain m(tophad) m(whad) Jet energy scale calibration possible from shift in m(w) L=300 pb-1 (~1 week of running) S/B = 0.45 S/B = 0.27 S/B = / 34

31 Signal + Wjets background (Full Simulation) W CANDIDATE TOP CANDIDAT E Now also exploit correlation between m(tophad) and m(whad) Show m(tophad) only for events with m(jj) m(w) <10 GeV m(tophad) m(tophad) m(whad) L=300 pb-1 (~1 week of running) S/B = 1.77 S/B = / 34

32 Signal + Wjets background (Full Simulation) Can also clean up sample by with requirement on m(jlν) [semi leptonic top] NB: There are two m(top) solutions for each candidate due to ambiguity in reconstruction of pz of neutrino Also clean signal quite a bit m(w) cut not applied here m(tophad) m(tophad) L=300 pb-1 (~1 week of running) m(jlν )-mt <30 GeV S/B = 0.45 S/B = / 34

33 Exploiting ttbar as b jet sample (Full Simulation) W CANDIDATE TOP CANDIDAT E Simple demonstration use of ttbar sample to provide b enriched jet sample Cut on m(whad) and m(tophad) masses Look at b jet prob for 4th jet (must be b jet if all assignments are correct) W+jets (background) ttbar (signal) random jet, no b enhancement expected always b jet if all jet assignment are OK b enrichment expected and observed AOD b-jet probability AOD b-jet probability Clear enhancement observed! 33 / 34

34 If we are lucky we may have some interesting use of the LHC machine already by this winter. Any way, come to Kraków EPS Conference next year 34 / 34

Measurement of the Mass of the Top Quark in the l+ Jets Channel Using the Matrix Element Method

Measurement of the Mass of the Top Quark in the l+ Jets Channel Using the Matrix Element Method Measurement of the Mass of the Top Quark in the l+ Jets Channel Using the Matrix Element Method Carlos Garcia University of Rochester For the DØ Collaboration APS Meeting 2007 Outline Introduction Top

More information

Beyond the Hype: The Status of the ATLAS Experiment and the Large Hadron Collider at CERN. Kenneth Johns University of Arizona

Beyond the Hype: The Status of the ATLAS Experiment and the Large Hadron Collider at CERN. Kenneth Johns University of Arizona Beyond the Hype: The Status of the ATLAS Experiment and the Large Hadron Collider at CERN Kenneth Johns University of Arizona A Dream LHC Schedule LHC (Large Hadron Collider) 3 First Beam in the LHC September

More information

Top rediscovery at ATLAS and CMS

Top rediscovery at ATLAS and CMS Top rediscovery at ATLAS and CMS on behalf of ATLAS and CMS collaborations CNRS/IN2P3 & UJF/ENSPG, LPSC, Grenoble, France E-mail: julien.donini@lpsc.in2p3.fr We describe the plans and strategies of the

More information

LHC discoveries and Particle Physics Concepts for Education

LHC discoveries and Particle Physics Concepts for Education LHC discoveries and Particle Physics Concepts for Education Farid Ould- Saada, University of Oslo On behalf of IPPOG EPS- HEP, Vienna, 25.07.2015 A successful program LHC data are successfully deployed

More information

Beauty Production and Identification at CMS

Beauty Production and Identification at CMS Beauty Production and Identification at CMS Alexander Schmidt Physik-Institut presented at: Outline - the CMS detector - b-production in hadron collisions - applications of b-identification methods - some

More information

Calorimetry in particle physics experiments

Calorimetry in particle physics experiments Calorimetry in particle physics experiments Unit n. 8 Calibration techniques Roberta Arcidiacono Lecture overview Introduction Hardware Calibration Test Beam Calibration In-situ Calibration (EM calorimeters)

More information

W-boson production in association with jets at the ATLAS experiment at LHC

W-boson production in association with jets at the ATLAS experiment at LHC W-boson production in association with jets at the ATLAS experiment at LHC Seth Zenz Qualifying Examination Talk January 14 2008 (Introductory section only; modified slightly for public distribution.)

More information

Top-Quark Studies at CMS

Top-Quark Studies at CMS Top-Quark Studies at CMS Tim Christiansen (CERN) on behalf of the CMS Collaboration ICHEP 2010, Paris 35th International Conference on High-Energy Physics tt 2 km 22 28 July 2010 Single-top 4 km New Physics

More information

CMS Physics Analysis Summary

CMS Physics Analysis Summary Available on the CMS information server CMS PAS TOP 08 005 CMS Physics Analysis Summary 008/05/4 Observability of Top Quark Pair Production in the Semileptonic Muon Channel with the first pb of CMS Data

More information

Open access to data and analysis tools from the CMS experiment at the LHC

Open access to data and analysis tools from the CMS experiment at the LHC Open access to data and analysis tools from the CMS experiment at the LHC Thomas McCauley (for the CMS Collaboration and QuarkNet) University of Notre Dame, USA thomas.mccauley@cern.ch! 5 Feb 2015 Outline

More information

Performance of track and vertex reconstruction and b-tagging studies with CMS in pp collisions at s =7 TeV

Performance of track and vertex reconstruction and b-tagging studies with CMS in pp collisions at s =7 TeV Performance of track and vertex reconstruction and b-tagging studies with CMS in pp collisions at s =7 TeV Universität Zürich, CH-857 Zürich, Switzerland E-mail: Alexander.Schmidt@cern.ch First 7 TeV proton-proton

More information

Highlights of Recent CMS Results. Dmytro Kovalskyi (UCSB)

Highlights of Recent CMS Results. Dmytro Kovalskyi (UCSB) Highlights of Recent CMS Results Dmytro Kovalskyi (UCSB) Introduction Number of CMS publication is over 0 already It is very hard to review all the recent results in one talk This talk concentrates on

More information

Measurement of Neutralino Mass Differences with CMS in Dilepton Final States at the Benchmark Point LM9

Measurement of Neutralino Mass Differences with CMS in Dilepton Final States at the Benchmark Point LM9 Measurement of Neutralino Mass Differences with CMS in Dilepton Final States at the Benchmark Point LM9, Katja Klein, Lutz Feld, Niklas Mohr 1. Physikalisches Institut B RWTH Aachen Introduction Fast discovery

More information

Searches for Non-Standard Model Higgs Bosons at CMS

Searches for Non-Standard Model Higgs Bosons at CMS Searches for Non-Standard Model Higgs Bosons at CMS Paolo SPAGNOLO on behalf of the CMS Collaboration INFN Pisa, Italy These proceedings report the results on the Higgs Searches beyond the Standard Model

More information

Physik des Higgs Bosons. Higgs decays V( ) Re( ) Im( ) Figures and calculations from A. Djouadi, Phys.Rept. 457 (2008) 1-216

Physik des Higgs Bosons. Higgs decays V( ) Re( ) Im( ) Figures and calculations from A. Djouadi, Phys.Rept. 457 (2008) 1-216 : Higgs decays V( ) Re( ) Im( ) Figures and calculations from A. Djouadi, Phys.Rept. 457 (2008) 1-216 1 Reminder 10.6.2014 Higgs couplings: 2 Reminder 10.6.2014 Higgs BF as a function of mh Higgs total

More information

variables to investigate Monte Carlo methods of t t production

variables to investigate Monte Carlo methods of t t production Using the M 2 and variables to investigate Monte Carlo methods of t t production Caitlin Jones September 8, 25 Abstract In this project the behaviour of Monte Carlo simulations for the event t t! ` `+b

More information

Real Time Tracking with ATLAS Silicon Detectors and its Applications to Beauty Hadron Physics

Real Time Tracking with ATLAS Silicon Detectors and its Applications to Beauty Hadron Physics Real Time Tracking with ATLAS Silicon Detectors and its Applications to Beauty Hadron Physics Carlo Schiavi Dottorato in Fisica - XVII Ciclo Outline The ATLAS Experiment The SiTrack Algorithm Application

More information

ATLAS NOTE ATLAS-CONF-2010-063. July 21, 2010. Search for top pair candidate events in ATLAS at s = 7 TeV. The ATLAS Collaboration.

ATLAS NOTE ATLAS-CONF-2010-063. July 21, 2010. Search for top pair candidate events in ATLAS at s = 7 TeV. The ATLAS Collaboration. ATLAS NOTE ATLAS-CONF-2010-063 July 21, 2010 Search for top pair candidate events in ATLAS at s = 7 TeV The ATLAS Collaboration Abstract A search is performed for events consistent with top quark pair

More information

Search for Higgs bosons

Search for Higgs bosons Dezső Horváth: Search for Higgs bosons Balaton Summer School, Balatongyörök, 07.07.2009 p. 1/25 Search for Higgs bosons Balaton Summer School, Balatongyörök, 07.07.2009 Dezső Horváth MTA KFKI Research

More information

Single Top Production at the Tevatron

Single Top Production at the Tevatron Single Top Production at the Tevatron Daniel Wicke (Bergische Universität Wuppertal) Introduction Outline DØ Cross Section CDF Results DØ V tb Conclusions Revision : 1.7 DESY-Zeuthen, 21-Feb-2007 1 Introduction

More information

Search for Dark Matter at the LHC

Search for Dark Matter at the LHC Search for Dark Matter at the LHC Steven Lowette Vrije Universiteit Brussel - IIHE 19 November 2014 3rd CosPa Meeting Université de Liège Content Introduction Generic DM searches at the LHC Explicit DM

More information

Calorimeter alignmnt and calibration in ILD

Calorimeter alignmnt and calibration in ILD Calorimeter alignmnt and calibration in ILD Executive summary We summarize here the answers of ILD to the questions raised by IDAG regarding the calorimeter alignment and calibration. We present calibration

More information

CMS Physics Analysis Summary

CMS Physics Analysis Summary Available on the CERN CDS information server CMS PAS RK-10-002 CMS Physics Analysis Summary Contact: cms-pog-conveners-tracking@cern.ch 2010/07/20 Measurement of racking Efficiency he CMS Collaboration

More information

Jet Reconstruction in CMS using Charged Tracks only

Jet Reconstruction in CMS using Charged Tracks only Jet Reconstruction in CMS using Charged Tracks only Andreas Hinzmann for the CMS Collaboration JET2010 12 Aug 2010 Jet Reconstruction in CMS Calorimeter Jets clustered from calorimeter towers independent

More information

at Low and High Q 2 at H1

at Low and High Q 2 at H1 1 Measurement of F c c and F b b at Low and High Q at H1 Tatsiana Klimkovich DESY, FLC, H1 Contents Heavy Flavour Production in Perturbative QCD H1 Experiment at HERA Motivation for the Analysis Inclusive

More information

The Compact Muon Solenoid Experiment. CMS Note. Mailing address: CMS CERN, CH-1211 GENEVA 23, Switzerland. D. J. Mangeol, U.

The Compact Muon Solenoid Experiment. CMS Note. Mailing address: CMS CERN, CH-1211 GENEVA 23, Switzerland. D. J. Mangeol, U. Available on CMS information server CMS NOTE 6/96 The Compact Muon Solenoid Experiment CMS Note Mailing address: CMS CERN, CH11 GENEVA 3, Switzerland July, 6 Search for χ decays to ττ and SUSY mass spectrum

More information

Study of the B D* ℓ ν with the Partial Reconstruction Technique

Study of the B D* ℓ ν with the Partial Reconstruction Technique Study of the B D* ℓ ν with the Partial Reconstruction Technique + University of Ferrara / INFN Ferrara Dottorato di Ricerca in Fisica Ciclo XVII Mirco Andreotti 4 March 25 Measurement of B(B D*ℓν) from

More information

Physik des Higgs Bosons. Higgs decays V( ) Re( ) Im( ) Figures and calculations from A. Djouadi, Phys.Rept. 457 (2008) 1-216

Physik des Higgs Bosons. Higgs decays V( ) Re( ) Im( ) Figures and calculations from A. Djouadi, Phys.Rept. 457 (2008) 1-216 : Higgs decays V( ) Re( ) Im( ) Figures and calculations from A. Djouadi, Phys.Rept. 457 (2008) 1-216 1 Reminder 10.6.2014 Higgs couplings: 2 Reminder 10.6.2014 Higgs BF as a function of mh Higgs total

More information

Cross section, Flux, Luminosity, Scattering Rates

Cross section, Flux, Luminosity, Scattering Rates Cross section, Flux, Luminosity, Scattering Rates Table of Contents Paul Avery (Andrey Korytov) Sep. 9, 013 1 Introduction... 1 Cross section, flux and scattering... 1 3 Scattering length λ and λ ρ...

More information

Calorimetry in particle physics experiments

Calorimetry in particle physics experiments Calorimetry in particle physics experiments Unit n. 5 Hadron calorimeters Roberta Arcidiacono Lecture overview Main technique Few more words on compensation Particle Flow technique Two examples: ZEUS HCAL

More information

FCC 1309180800 JGU WBS_v0034.xlsm

FCC 1309180800 JGU WBS_v0034.xlsm 1 Accelerators 1.1 Hadron injectors 1.1.1 Overall design parameters 1.1.1.1 Performance and gap of existing injector chain 1.1.1.2 Performance and gap of existing injector chain 1.1.1.3 Baseline parameters

More information

The OPERA Emulsions. Jan Lenkeit. Hamburg Student Seminar, 12 June 2008. Institut für Experimentalphysik Forschungsgruppe Neutrinophysik

The OPERA Emulsions. Jan Lenkeit. Hamburg Student Seminar, 12 June 2008. Institut für Experimentalphysik Forschungsgruppe Neutrinophysik The OPERA Emulsions Jan Lenkeit Institut für Experimentalphysik Forschungsgruppe Neutrinophysik Hamburg Student Seminar, 12 June 2008 1/43 Outline The OPERA experiment Nuclear emulsions The OPERA emulsions

More information

CMS L1 Track Trigger for SLHC

CMS L1 Track Trigger for SLHC CMS L1 Track Trigger for SLHC Anders Ryd for the CMS Track Trigger Task Force Vertex 2009 Sept. 13-18, 2009 L=1035 cm-2s-1 Outline: SLHC trigger challenge Tracking triggers Track trigger modules Simulation

More information

PrHEP JHW2002. Experiments on high energy reactions in the diffractive regime at LHC. 1. Introduction. Twenty-sixth Johns Hopkins Workshop

PrHEP JHW2002. Experiments on high energy reactions in the diffractive regime at LHC. 1. Introduction. Twenty-sixth Johns Hopkins Workshop PROCEEDINGS Experiments on high energy reactions in the diffractive regime at LHC Helsinki Institute for Physics, c/o CERN, Route de Meyrin, CH-1211 Geneva 23, Switzerland E-mail: Stefan.Tapprogge@cern.ch

More information

Theoretical Particle Physics FYTN04: Oral Exam Questions, version ht15

Theoretical Particle Physics FYTN04: Oral Exam Questions, version ht15 Theoretical Particle Physics FYTN04: Oral Exam Questions, version ht15 Examples of The questions are roughly ordered by chapter but are often connected across the different chapters. Ordering is as in

More information

Z-Path 2016 Event Displays Examples of l + l -, γγ and 4-lepton events

Z-Path 2016 Event Displays Examples of l + l -, γγ and 4-lepton events Z-Path 2016 Event Displays Examples of l + l -, γγ and 4-lepton events This compilation goes through examples of events the students will be looking at. This includes events easy to interpret, as well

More information

From Jet Scaling to Jet Vetos

From Jet Scaling to Jet Vetos From Jet Scaling to Jet Vetos Heidelberg DESY, 2/202 LHC Higgs analyses Two problems for LHC Higgs analyses [talks Rauch, Englert] observe H b b decays [fat Higgs jets, Marcel s talk] 2 understand jet

More information

Digital Calorimeter. Edwin Norbeck 1, Burak Bilki 1, Yasar Onel 1, José Repond 2, and Lei Xia 2. 1. Introduction

Digital Calorimeter. Edwin Norbeck 1, Burak Bilki 1, Yasar Onel 1, José Repond 2, and Lei Xia 2. 1. Introduction Proc. 25th Winter Workshop on Nuclear Dynamics (2009) 000 000 25th Winter Workshop on Nuclear Dynamics Big Sky, Montana, USA February 1 8, 2009 Digital Calorimeter Edwin Norbeck 1, Burak Bilki 1, Yasar

More information

Large Hadron Collider am CERN

Large Hadron Collider am CERN The CMS Silicon Tracker Lutz Feld 1. Physikalisches Institut, RWTH Aachen GSI Darmstadt, 18. 4. 2007 Large Hadron Collider am CERN proton proton quarks & gluons circumference 27 km 1200 superconducting

More information

Risultati recenti dell'esperimento CMS ad LHC e prospettive per il run a 14 TeV

Risultati recenti dell'esperimento CMS ad LHC e prospettive per il run a 14 TeV Risultati recenti dell'esperimento CMS ad LHC e prospettive per il run a 14 TeV Luca Lista INFN Napoli 1 78 reconstructed vertices CMS experiment CMS recorded 5fb-1 at 7 TeV and 20 fb-1 at 8 TeV 2 Electroweak

More information

A Guide to Detectors Particle Physics Masterclass. M. van Dijk

A Guide to Detectors Particle Physics Masterclass. M. van Dijk A Guide to Particle Physics Masterclass M. van Dijk 16/04/2013 How detectors work Scintillation Ionization Particle identification Tracking Calorimetry Data Analysis W & Z bosons 2 Reconstructing collisions

More information

Searches for SUSY in events with two or more leptons in CMS

Searches for SUSY in events with two or more leptons in CMS Searches for SUSY in events with two or more leptons in CMS On behalf of the CMS Collaboration Eidgenössische Technische Hochschule Zürich (ETH Zurich), E-mail: pablom@cern.ch We present results of searches

More information

Data analysis in Par,cle Physics

Data analysis in Par,cle Physics Data analysis in Par,cle Physics From data taking to discovery Tuesday, 13 August 2013 Lukasz Kreczko - Bristol IT MegaMeet 1 $ whoami Lukasz (Luke) Kreczko Par,cle Physicist Graduated in Physics from

More information

Physics Tools and Physics Preparations

Physics Tools and Physics Preparations Physics Tools and Physics Preparations DOE Review, 2009 Ariel Schwartzman Washington, 11-June-2009 Outline Physics Tools Algorithms and techniques for jet reconstruction, energy scale, and b-tagging. Development

More information

PoS(LHCPP2013)033. Rare B meson decays at LHC. Francesco Dettori Nikhef and Vrij Universiteit, Amsterdam E-mail: fdettori@nikhef.nl.

PoS(LHCPP2013)033. Rare B meson decays at LHC. Francesco Dettori Nikhef and Vrij Universiteit, Amsterdam E-mail: fdettori@nikhef.nl. Nikhef and Vrij Universiteit, Amsterdam E-mail: fdettori@nikhef.nl Paolo Iengo INFN Napoli E-mail: paolo.iengo@cern.ch Luca Martini INFN Pisa E-mail: Luca.Martini@cern.ch Rare decays of B mesons are fundamental

More information

Implications of CMS searches for the Constrained MSSM A Bayesian approach

Implications of CMS searches for the Constrained MSSM A Bayesian approach Implications of CMS searches for the Constrained MSSM A Bayesian approach Małgorzata Kazana, Yue-Lin Sming Tsai On behalf of the BayesFITS group National Centre for Nuclear Research Warsaw, Poland BayesFITS,

More information

Curriculum Vitae of Donatella Lucchesi

Curriculum Vitae of Donatella Lucchesi Curriculum Vitae of Donatella Lucchesi Address Department of Physics and Astronomy University of Padova via Marzolo 8 35131 Padova Italy Phone (39) 049 827 7253 Email donatella.lucchesi@pd.infn.it Born

More information

The accurate calibration of all detectors is crucial for the subsequent data

The accurate calibration of all detectors is crucial for the subsequent data Chapter 4 Calibration The accurate calibration of all detectors is crucial for the subsequent data analysis. The stability of the gain and offset for energy and time calibration of all detectors involved

More information

THE TOP QUARK Updated September 2013 by T.M. Liss (Univ. Illinois), F. Maltoni (Univ. Catholique de Louvain), and A. Quadt (Univ. Göttingen).

THE TOP QUARK Updated September 2013 by T.M. Liss (Univ. Illinois), F. Maltoni (Univ. Catholique de Louvain), and A. Quadt (Univ. Göttingen). 1 THE TOP QUARK Updated September 2013 by T.M. Liss (Univ. Illinois), F. Maltoni (Univ. Catholique de Louvain), and A. Quadt (Univ. Göttingen). A. Introduction The top quark is the Q = 2/3, T 3 = +1/2

More information

In situ jet energy calibration in the ATLAS experiment.

In situ jet energy calibration in the ATLAS experiment. In situ jet energy calibration in the ATLAS experiment. C. Biscarat, R. Lefevre, C. Santoni To cite this version: C. Biscarat, R. Lefevre, C. Santoni. In situ jet energy calibration in the ATLAS experiment..

More information

Information about the T9 beam line and experimental facilities

Information about the T9 beam line and experimental facilities Information about the T9 beam line and experimental facilities The incoming proton beam from the PS accelerator impinges on the North target and thus produces the particles for the T9 beam line. The collisions

More information

The TOTEM experiment at the LHC: results and perspective

The TOTEM experiment at the LHC: results and perspective The TOTEM experiment at the LHC: results and perspective Edoardo Bossini Università degli studi di Siena and INFN-Pisa (on behalf of the TOTEM collaboration) Trieste, 24 Settembre 2013 OUTLINE: Detector

More information

Single-Top Production at the Tevatron and the LHC: Results and Prospects

Single-Top Production at the Tevatron and the LHC: Results and Prospects Single-Top Production at the Tevatron and the LHC: Results and Prospects Wolfgang Wagner Bergische Universität Wuppertal DESY Zeuthen, June 16, 2011 Content: 1) Introduction / History 2) Experimental Status

More information

Jets energy calibration in ATLAS

Jets energy calibration in ATLAS Jets energy calibration in ATLAS V.Giangiobbe Università di Pisa INFN sezione di Pisa Supported by the ARTEMIS Research Training Network Workshop sui Monte Carlo, la Fisica e le Simulazioni a LHC V.Giangiobbe

More information

High Energy Physics. Lecture 4 More kinematics and a picture show of particle collisions

High Energy Physics. Lecture 4 More kinematics and a picture show of particle collisions High Energy Physics Lecture 4 More kinematics and a picture show of particle collisions 1 Recall from the previous lecture: the momentum of the scattered Particle in an elastic collision is given by p

More information

3. Energy measurement in calorimeters

3. Energy measurement in calorimeters Part II, 3. Energy measurement in calorimeters 3.1 Concept of a calorimeter in particle physics 3.2 Interactions of photons with matter 3.3 Electromagnetic and hadronic showers 3.4 Layout and readout of

More information

The CMS All Silicon Tracker

The CMS All Silicon Tracker The CMS All Silicon Tracker A Detector for the Exploration of the Terascale Lutz Feld 1. Physikalisches Institut, RWTH Aachen Göttingen, 25. 1. 2008 Large Hadron Collider at CERN proton proton quarks &

More information

FTK the online Fast Tracker for the ATLAS upgrade

FTK the online Fast Tracker for the ATLAS upgrade FTK the online Fast Tracker for the ATLAS upgrade Kostas Kordas Aristotle University of Thessaloniki Annual EESFYE mtg, University of the Aegean, Chios, 25-29 April 2013 Overview ATLAS Trigger and DAQ

More information

PoS(Kruger 2010)013. Setting of the ATLAS Jet Energy Scale. Michele Petteni Simon Fraser University E-mail: mpetteni@sfu.ca

PoS(Kruger 2010)013. Setting of the ATLAS Jet Energy Scale. Michele Petteni Simon Fraser University E-mail: mpetteni@sfu.ca Setting of the ALAS Energy Scale Simon Fraser University E-mail: mpetteni@sfu.ca he setting of the energy scale and its uncertainty in the ALAS detector is presented. After a brief introduction of the

More information

Searches for Physics Beyond the Standard Model at the LHC. Karl Jakobs Physikalisches Institut Universität Freiburg

Searches for Physics Beyond the Standard Model at the LHC. Karl Jakobs Physikalisches Institut Universität Freiburg Searches for Physics Beyond the Standard Model at the LHC Karl Jakobs Physikalisches Institut Universität Freiburg Outline of the lectures: 1. Introduction. Brief summary of detector performance and Standard

More information

Online CMS Web-Based Monitoring. Zongru Wan Kansas State University & Fermilab (On behalf of the CMS Collaboration)

Online CMS Web-Based Monitoring. Zongru Wan Kansas State University & Fermilab (On behalf of the CMS Collaboration) Online CMS Web-Based Monitoring Kansas State University & Fermilab (On behalf of the CMS Collaboration) Technology and Instrumentation in Particle Physics June 13, 2011 Chicago, USA CMS One of the high

More information

Energy reconstruction and calibration algorithms for the ATLAS electromagnetic calorimeter

Energy reconstruction and calibration algorithms for the ATLAS electromagnetic calorimeter Università degli Studi di Milano Facoltà di Scienze Matematiche, Fisiche e Naturali Dottorato di Ricerca in Fisica Energy reconstruction and calibration algorithms for the ATLAS electromagnetic calorimeter

More information

Calorimeter Upgrades for the High Luminosity LHC

Calorimeter Upgrades for the High Luminosity LHC Calorimeter Upgrades for the High Luminosity LHC A. Straessner FSP 101 ATLAS DPG Frühjahrstagung Göttingen März, 2012 Outline Introduction: ATLAS and CMS Detectors Today Physics at the High-Luminosity

More information

Calibration of the muon momentum resolution in view of the W mass measurement with the CMS experiment

Calibration of the muon momentum resolution in view of the W mass measurement with the CMS experiment Calibration of the muon momentum resolution in view of the W mass measurement with the CMS experiment GIULIA RIPELLINO Master of Science Thesis Supervisor CERN: Luigi Rolandi Supervisor KTH: Jonas Strandberg

More information

Running in 2011 - Luminosity. Mike Lamont Verena Kain

Running in 2011 - Luminosity. Mike Lamont Verena Kain Running in 2011 - Luminosity Mike Lamont Verena Kain Presentations Many thanks to all the speakers! Experiments expectations Massi Ferro-Luzzi Pushing the limits: beam Elias Métral Pushing the limits:

More information

TOP QUARK IN ELECTROWEAK PRODUCTION CHANNELS AT ATLAS

TOP QUARK IN ELECTROWEAK PRODUCTION CHANNELS AT ATLAS MASS MEASUREMENTS OF THE TOP QUARK IN ELECTROWEAK PRODUCTION CHANNELS AT ATLAS PROEFSCHRIFT ter verkrijging van de graad van doctor aan de Universiteit Twente, op gezag van de rector magnificus, prof.

More information

Shared Computing Driving Discovery: From the Large Hadron Collider to Virus Hunting. Frank Würthwein

Shared Computing Driving Discovery: From the Large Hadron Collider to Virus Hunting. Frank Würthwein Shared Computing Driving Discovery: From the Large Hadron Collider to Virus Hunting Frank Würthwein Professor of Physics University of California San Diego February 14th, 2015 The Science of the LHC The

More information

Testing the In-Memory Column Store for in-database physics analysis. Dr. Maaike Limper

Testing the In-Memory Column Store for in-database physics analysis. Dr. Maaike Limper Testing the In-Memory Column Store for in-database physics analysis Dr. Maaike Limper About CERN CERN - European Laboratory for Particle Physics Support the research activities of 10 000 scientists from

More information

Calibration and performance test of the Very Front End electronics for the CMS electromagnetic calorimeter

Calibration and performance test of the Very Front End electronics for the CMS electromagnetic calorimeter Calibration and performance test of the Very Front End electronics for the CMS electromagnetic calorimeter Jan Blaha IPN Lyon 10th Topical Seminar on Innovative Particle and Radiation Detectors (IPRD06)

More information

CMS Tracking Performance Results from early LHC Running

CMS Tracking Performance Results from early LHC Running CMS Tracking Performance Results from early LHC Running CMS PAPER TRK-10-001 L. Spiegel, K. Stenson, M. Swartz 1 First Collisions Tracking Paper Provide description of tracker, tracking algorithm, and

More information

Constraints on the top quark s charge with the CMS experiment

Constraints on the top quark s charge with the CMS experiment Constraints on the top quark s charge with the CMS experiment Von der Fakultät für Mathematik, Informatik und Naturwissenschaften der RWTH Aachen University zur Erlangung des akademischen Grades einer

More information

Validation of the MadAnalysis 5 implementation of ATLAS-SUSY-13-05

Validation of the MadAnalysis 5 implementation of ATLAS-SUSY-13-05 Validation of the MadAnalysis 5 implementation of ATLAS-SUSY-3-5 Guillaume Chalons (LPSC Grenoble) email: chalons@lpsc.in2p3.fr October 27, 24 Abstract In this note we summarise our validation of the ATLAS

More information

ATLAS NOTE ATLAS-CONF-2013-108. November 28, 2013. Evidence for Higgs Boson Decays to theτ + τ Final State with the ATLAS Detector

ATLAS NOTE ATLAS-CONF-2013-108. November 28, 2013. Evidence for Higgs Boson Decays to theτ + τ Final State with the ATLAS Detector ATLAS NOTE ATLAS-CONF-1-8 November 8, 1 Evidence for Higgs Boson Decays to theτ + τ Final State with the ATLAS Detector The ATLAS Collaboration Abstract ATLAS-CONF-1-8 8 November 1 A search for the Higgs

More information

Electron identification algorithms for calorimeter in front of CBM MuCH. Mikhail Prokudin

Electron identification algorithms for calorimeter in front of CBM MuCH. Mikhail Prokudin Electron identification algorithms for calorimeter in front of CBM MuCH Mikhail Prokudin Outline Electron identification Calorimeter geometry Methods Cluster Cluster formation E calo /P track Impact Impact

More information

Selected Results on Diffraction at HERA

Selected Results on Diffraction at HERA Selected Results on Diffraction at HERA Grzegorz Gach Various Faces of QCD May 014 Grzegorz Gach Selected Results on Diffraction at HERA 1 HERA DESY, Hamburg 199-007 e/e + - p 7.5 GeV 80 GeV 90 GeV Ldt

More information

The Large Hadron Collider: The Big Bang Machine

The Large Hadron Collider: The Big Bang Machine The Large Hadron Collider: The Big Bang Machine Albert De Roeck CERN, Geneva, Switzerland Antwerp University Belgium Davis University USA IPPP, Durham UK 3 May 2012 Contents In this talk I will present

More information

1 Experiments (Brahms, PHENIX, and STAR)

1 Experiments (Brahms, PHENIX, and STAR) 1 Experiments (Brahms, PHENIX, and STAR) This section describes the three experiments capable of making spin measurements. 1.1 PHENIX RHIC has made great strides towards providing high luminosity beams

More information

D. Rainwater and D. Zeppenfeld. Department of Physics, University of Wisconsin, Madison, WI 53706. K. Hagiwara

D. Rainwater and D. Zeppenfeld. Department of Physics, University of Wisconsin, Madison, WI 53706. K. Hagiwara University of Wisconsin - Madison MADPH-98-1057 KEK-TH-589 August 1998 Searching for H ττ in weak boson fusion at the LHC D. Rainwater and D. Zeppenfeld Department of Physics, University of Wisconsin,

More information

Electron/photon Identification and Standard Model Higgs Process Studies at the High Level Trigger for the ATLAS experiment

Electron/photon Identification and Standard Model Higgs Process Studies at the High Level Trigger for the ATLAS experiment Electron/photon Identification and Standard Model Higgs Process Studies at the High Level Trigger for the ATLAS experiment CERN-THESIS-2006-055 02/02/2006 Inauguraldissertation der Philosophisch-naturwissenschaftlichen

More information

Middle East Technical University. Studying Selected Tools for HEP: CalcHEP

Middle East Technical University. Studying Selected Tools for HEP: CalcHEP Middle East Technical University Department of Physics Advanced Selected Problems in Physics Studying Selected Tools for HEP: CalcHEP Author: Jack Yakup Araz Supervisor: Assoc. Prof Ismail Turan December

More information

8. Electromagnetic Calorimeter 8.1 General considerations calorimeter

8. Electromagnetic Calorimeter 8.1 General considerations calorimeter 8. Electromagnetic Calorimeter 8.1 General considerations calorimeter energy- vs momentum measurement resolution: calorimeter σe/e 1/ E tracking detectors σp/p p e.g. at E p = 100 GeV σe/e 3.5% (ZEUS)

More information

LHCC TOTEM STATUS REPORT

LHCC TOTEM STATUS REPORT LHCC TOTEM STATUS REPORT Status of Roman Pot Consolidation & Upgrade Program Physics Analysis Highlights 4/9/2013 LHCC TOTEM 13.3.2013 CERN J. Baechler 1 TOTEM Status of Roman Pot Consolidation & Upgrade

More information

Operation and Performance of the CMS Silicon Tracker

Operation and Performance of the CMS Silicon Tracker Operation and Performance of the CMS Silicon Tracker Manfred Krammer 1 on behalf of the CMS Tracker Collaboration Institute of High Energy Physics, Austrian Academy of Sciences, Vienna, Austria Abstract.

More information

Theory versus Experiment. Prof. Jorgen D Hondt Vrije Universiteit Brussel jodhondt@vub.ac.be

Theory versus Experiment. Prof. Jorgen D Hondt Vrije Universiteit Brussel jodhondt@vub.ac.be Theory versus Experiment Prof. Jorgen D Hondt Vrije Universiteit Brussel jodhondt@vub.ac.be Theory versus Experiment Pag. 2 Dangerous cocktail!!! Pag. 3 The basics in these lectures Part1 : Theory meets

More information

Study of Jet Substructure in the ATLAS Experiment using Distributed Analysis within Spanish Tier-2 Infrastructures

Study of Jet Substructure in the ATLAS Experiment using Distributed Analysis within Spanish Tier-2 Infrastructures Study of Jet Substructure in the ATLAS Experiment using Distributed Analysis within Spanish Tier-2 Infrastructures Elena Oliver García Dirigido por: José Francisco Salt Cairols and Santiago González de

More information

Version 18 October 2008

Version 18 October 2008 Fact sheet Version 18 October 2008 CERN: the LHC and Switzerland s contributions 1. Introduction The Large Hadron Collider (LHC), together with its four detectors ALICE, ATLAS, CMS and LHCb, represents

More information

Concepts in Theoretical Physics

Concepts in Theoretical Physics Concepts in Theoretical Physics Lecture 6: Particle Physics David Tong e 2 The Structure of Things 4πc 1 137 e d ν u Four fundamental particles Repeated twice! va, 9608085, 9902033 Four fundamental forces

More information

arxiv:1006.5339v1 [hep-ph] 28 Jun 2010

arxiv:1006.5339v1 [hep-ph] 28 Jun 2010 FR-PHENO-2010-021 arxiv:1006.5339v1 [hep-ph] 28 Jun 2010 NLO QCD corrections to 4 b-quark production University of Illinois at Urbana-Champaign, Urbana IL, 61801 USA E-mail: ngreiner@illinois.edu Alberto

More information

ATLAS High-mass MSSM H/A ττ search at 13 TeV. LHCP 2016 Mark Pickering (University of Oxford) on behalf of the ATLAS collaboration

ATLAS High-mass MSSM H/A ττ search at 13 TeV. LHCP 2016 Mark Pickering (University of Oxford) on behalf of the ATLAS collaboration ATLAS High-mass MSSM H/A ττ search at 13 TeV LHCP 2016 (University of Oxford) on behalf of the ATLAS collaboration 1 Motivation MSSM Higgs sector: two Higgs doublets five Higgs Bosons Two charged H+/-,

More information

arxiv:hep-ph/0310021v2 4 Oct 2003

arxiv:hep-ph/0310021v2 4 Oct 2003 Physics in Collision - Zeuthen, Germany, June 6-8, 003 arxiv:hep-ph/0300v 4 Oct 003 SEARCHES FOR NEW PARTICLES AT THE ENERGY FRONTIER AT THE TEVATRON Patrice VERDIER LAL, Université Paris-Sud, 9898 Orsay

More information

Supersymmetry Supergravity Superstring Supercolliders

Supersymmetry Supergravity Superstring Supercolliders The Super Era of Sub-Atomic Particle Physics Jay Hauser Abstract: Particle physics has now moved into the "Super" era, in which Supersymmetry, Supergravity, and Superstring theories will be investigated

More information

Bounding the Higgs width at the LHC

Bounding the Higgs width at the LHC Bounding the Higgs width at the LHC Higgs XSWG workshop, June 2014 John Campbell, Fermilab with K. Ellis, C. Williams 1107.5569, 1311.3589, 1312.1628 Reminder of the method This is the essence of the original

More information

PoS(BEAUTY 2011)001. Measurement of exclusive b-hadron production at 7 TeV with the CMS experiment

PoS(BEAUTY 2011)001. Measurement of exclusive b-hadron production at 7 TeV with the CMS experiment Measurement of exclusive b-hadron production at 7 TeV with the CMS experiment Universtät Zürich E-mail: eaguiloc@mail.cern.ch Measurements of the total and single differential cross sections for B and

More information

Progress in understanding quarkonium polarization measurements

Progress in understanding quarkonium polarization measurements 1 Progress in understanding quarkonium polarization measurements 1. Why it is essential that we approach the measurement of polarization as a multidimensional problem: we must not average out information!.

More information

Energy loss. Calorimeters. First: EM calorimeters

Energy loss. Calorimeters. First: EM calorimeters Calorimeters The energy of hadrons, pions, photons and electrons can be measured with calorimeters. This in contrast with muons: their momentum is measured from their track curvature (sagitta). The principle

More information

Optimisation of the ATLAS track reconstruction software for Run-2. A. Salzburger, CERN

Optimisation of the ATLAS track reconstruction software for Run-2. A. Salzburger, CERN Optimisation of the ATLAS track reconstruction software for Run-2 A. Salzburger, CERN ATLAS Inner Detector (ID) track reconstruction Track reconstruction is the most challenging step in event reconstruction

More information

Performance Evalua/on and So2ware Development of FPCCD Vertex Detector for ILC

Performance Evalua/on and So2ware Development of FPCCD Vertex Detector for ILC Performance Evalua/on and So2ware Development of FPCCD Vertex Detector for ILC MORI Tatsuya, KAMAI Daisuke, MIYAMOTO Akiya A SUGIMOTO Yasuhiro A, ISHIKAWA Akimasa, SUEHARA Taikan, KATO Eriko, YAMAMOTO

More information

Physics for the 21 st Century. Unit 1: The Basic Building Blocks of Matter. Bonnie Fleming and Mark Kruse

Physics for the 21 st Century. Unit 1: The Basic Building Blocks of Matter. Bonnie Fleming and Mark Kruse Physics for the 21 st Century Unit 1: The Basic Building Blocks of Matter Bonnie Fleming and Mark Kruse What are the basic building blocks that make up all matter? BONNIE FLEMING: The basic building blocks

More information

A New Precise Measurement of the W Boson Mass by CDF Ashutosh Kotwal Duke University. For the CDF Collaboration

A New Precise Measurement of the W Boson Mass by CDF Ashutosh Kotwal Duke University. For the CDF Collaboration A New Precise Measurement of the W Boson Mass by CDF Ashutosh Kotwal Duke University For the CDF Collaboration Joint Theoretical-Experimental Physics Seminar Fermilab, 23 February 2012 Spontaneous Symmetry

More information

Neural networks in data analysis

Neural networks in data analysis ISAPP Summer Institute 2009 Neural networks in data analysis Michal Kreps ISAPP Summer Institute 2009 M. Kreps, KIT Neural networks in data analysis p. 1/38 Outline What are the neural networks 1 Basic

More information