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

Save this PDF as:
 WORD  PNG  TXT  JPG

Size: px
Start display at page:

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

Transcription

1 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

2 Outline Introduction Top quark at the Tevatron. The Matrix Element Method Basics of the method used. Top Quark Mass Measurement in the l+jets Channel Results from the 900 pb -1 of data. 2

3 Top Quark At the Tevatron, top quarks are primarily produced in pairs via the strong interaction. Since V tb ~ 1, the top quark almost always decays to Wb (Ws, Wd CKM suppressed) Event topology depends on the W decay mode jet E T mis ν b p b p jet jet jet Experimental signature in the lepton+jets channel: - 1 high p T lepton - 4 jets (2 b-jets) - large E T mis 3

4 Top Quark Identification Background Processes: W+jets ttbar Multi-jet background W+jets production.!! Multi-jet events: leading to fake or mis-characterized lepton and fake missing transverse energy! - Exactly 4 Calorimeter Jets p T > 20 GeV " < Isolated Lepton p T > 20 GeV " e < 1.1, " µ < Missing Transverse Energy E mis T > 20 GeV W+jets ttbar 4

5 The Basics of the Analysis I We calculate a probability per event to be signal or background as a function of the top mass and the Jet Energy Scale (JES). If we had all the parton level information 'y' this probability would be just proportional to the differential cross section. In reality is a bit more complicated: Initial state Differential cross section, based on LO Matrix Element ( qq " tt ) only Transfer Function: probability to measure x, when parton-level y was produced. P tt! ( x;m top,jes) = Normalization: 1 ( ) " m top # dq 1 dq 2 f ( q) f ( q )d"( y;m top )Prob( x, y,jes) Overall JES is a free parameter in the fit, constrained in situ by the mass of the W decaying hadronically Measurements (x): jets and leptons Background probability is conceptually the same but flat in m top and JES. 5

6 The Basics of the Analysis II b-tagging: Weight each jet to parton assignment with b-tagging probabilities. 24 possible weighted assignments between jets and partons Six particle final state P tt N"tag tt ( x;m top,jes) = # W c P tt c=1;24! W c tt = " J =1;4 p J c ( x;m top,jes) If jet J was tagged: If jet J was not tagged:!! Parameterized tagging efficiencies p J = " J ( flavor,#, p T ) p J =1"# J ( flavor,$, p T ) 6

7 The Basics of the Analysis III Probability per event: P N"tag evt ( ) ( x;m top,jes, f ) top = f top P N"tag ( tt x;m top,jes) + ( 1" f top )P bkg x,jes Probability per sample: P N"tag (x;m top,jes) = # P N"tag evt (x;m top,jes) evt f top = f top best (m top,jes) To combine the three b-tagged samples the 2D probabilities are multiplied:! P comb (x;m top,jes) = P 0"Tags (x;m top,jes)p 1"Tag (x;m top,jes)p 2"Tags (x;m top,jes) To use an external constraint in JES we convoluted the original likelihood with the measure in the photon + Jet sample which is represented as a Gaussian likelihood centred at JES = 1 with a width of 3.7% (this width is estimated from ttbar MC sample). P (x;m top,jes) = P comb (x;m top JES)G(JES) 7

8 Calibration Mass Calibration and Pull for Muons D0 Run II Preliminary Mass Calibration and Pull for Electrons D0 Run II Preliminary D0 Run II Preliminary Before applying to data, the method is calibrated for shifts in the mean and uncertainties using ensemble tests on simulated MC events. D0 Run II Preliminary 8

9 Data Result Data Sample Electrons channel (971 pb -1 ): 173 events in 0 Tags 57 events in 1 Tag 19 events in 2 Tags Muons channel (813 pb -1 ): 163 events in 0 Tags 70 events in 1 Tag 22 events in 2 Tags 249 events (28% purity) 255 events (25% purity) 9

10 Data Result Result combining Tags, Calibrated D0 Run II Preliminary m + jets D0 Run II Preliminary e + jets l + jets: 2.4 M top =170.5 ± 2.4 ( stat.+jes)gev 10

11 Data Result Result combining Tags, Calibrated Most Significant Systematic Errors (+) (-) Signal modeling l + jets b fragmentation model b/l ratio (1.5%) JES pt dependence TRF-Tagging MC Signal fraction QCD Contamination GeV l + jets: 2.4 M top =170.5 ± 2.4 ( stat.+jes) 1.2 ± 1.1 ( syst. )GeV 11

12 Top Mass Current Status Impact on Standard Model Higgs boson: M H = "24 GeV; M H 12

13 CONCLUSIONS D0 Run II Preliminary result for Tags from 900 pb -1 : With prior (3.7%) in JES: 2.4 M top =170.5 ± 2.4 ( stat.+jes) 1.2 ± 1.1 ( syst. )GeV A new improved measurement of the top quark mass allow us to reach the 1% precision (Combined DØ + CDF measurement). The precise measurement of top quark mass helps constrain the mass of the SM Higgs boson, and it is one of the most important measurements at the Tevatron. 13

14 DATA RESULT + PRIOR Combined Tag analysis, Calibrated + Prior m + jets e + jets l + jets: JES =1.032 ± stat. ( ) 14

15 Systematic Errors Error Source up(+) down(-) Physics modeling: Signal modeling b fragmentation model PDF uncertainty Background modeling b/c semileptonic decay Detector Modeling b/l ratio (1.5%) JES pt dependence Trigger b tagging TRF-Tagging MC TRF (signal) TRF (background) Method: Signal fraction QCD contamination MC calibration mass MC calibration JES Total Systematic Errors Total Errors (Stat.+JES+Sys.)

16 DATA 2D likelihood before calibration. Each color represents one sigma. After projection in the two dimensions we apply the calibration curves and adjust the errors using the final pulls. Electrons channel Muons channel 16

17 The Ensembles Example of composition and fluctuations in the ensembles (inputs). Electrons channel composition: 251 events 27.6% purity. Below are the purities for the different Tag samples. UNTAGGED 27.5% 0 TAG 10% 1 TAG 69% 2 TAG 92% 17

18 JES Calibration JES Calibration for Muons JES Calibration for Electrons Tags Tags 18

19 DATA RESULT Combined Tag analysis - Calibrated m + jets e + jets l + jets: JES =1.046 ± stat. ( ) 19

20 DATA RESULT Combined Tag analysis - Calibrated m + jets e + jets l + jets: 2.7 M top =169.2 ± 2.7 stat.+jes ( ) 20

21 DATA RESULT 2.7 M top =169.2 ± 2.7 Errors in Data relative to MC ( stat.+jes)gev! Combined Tag analysis - Calibrated 3.9GeV 3.7GeV 21

22 The DZero Detector and the Tevatron Tracking: Silicon vertex detector (SMT) Central Fiber Tracker (CFT) 2 T Superconducting Solenoid. η < 2.5 Preshowers EM/HAD Calorimeter: Central, η <1.1 Forward, η <4.2 Muon system: 1.8 T iron toroids. η <2.0 3-Level trigger system: Level 1 (hardware): 2 khz Level 2 (hardware): 1 khz Level 3 (software): 50 Hz 22

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

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

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

PHYSICS WITH LHC EARLY DATA

PHYSICS WITH LHC EARLY DATA 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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

STUDY OF SINGLE TOP QUARK PRODUCTION USING BAYESIAN NEURAL NETWORKS WITH DØ DETECTOR AT THE TEVATRON

STUDY OF SINGLE TOP QUARK PRODUCTION USING BAYESIAN NEURAL NETWORKS WITH DØ DETECTOR AT THE TEVATRON STUDY OF SINGLE TOP QUARK PRODUCTION USING BAYESIAN NEURAL NETWORKS WITH DØ DETECTOR AT THE TEVATRON A THESIS Submitted to the FACULTY OF SCIENCE PANJAB UNIVERSITY, CHANDIGARH for the degree of DOCTOR

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

A new inclusive secondary vertex algorithm for b-jet tagging in ATLAS

A new inclusive secondary vertex algorithm for b-jet tagging in ATLAS Home Search Collections Journals About Contact us My IOPscience A new inclusive secondary vertex algorithm for b-jet tagging in This content has been downloaded from IOPscience. Please scroll down to see

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

UNIVERSITY OF CALIFORNIA. Los Angeles. in Proton-Antiproton Collisions at 1.96 TeV. A dissertation submitted in partial satisfaction of the

UNIVERSITY OF CALIFORNIA. Los Angeles. in Proton-Antiproton Collisions at 1.96 TeV. A dissertation submitted in partial satisfaction of the UNIVERSITY OF CALIFORNIA Los Angeles Measurement of Electroweak Single Top Quark Production in Proton-Antiproton Collisions at 1.96 TeV A dissertation submitted in partial satisfaction of the requirements

More information

t th signal: theory status

t th signal: theory status t th signal: theory status M.V. Garzelli MTA - DE Particle Physics Research Group, Univ. Debrecen, Hungary e-mail: garzelli@to.infn.it LHC HXSWG Workshop CERN, June 12-13th, 2014 t th production at LHC

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

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

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

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

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

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

Electron-Muon Ranger (EMR)

Electron-Muon Ranger (EMR) Electron-Muon Ranger (EMR) Digitization and Reconstruction François Drielsma Ruslan Asfandiyarov University of Geneva On Behalf of the EMR Group 38 th MICE Collaboration Meeting February 23, 2014 Electron-Muon

More information

Calorimetry and particle identification

Calorimetry and particle identification Calorimetry and particle identification Summary of two selected HCPSS 2012 courses R. Märki EPFL - LPHE 8 October 2012 1/47 R. Märki Calorimetry and particle identification Outline I attended the 7th Annual

More information

!"#$%&'(%))*#+$',$*--+$.'/*,0'0*-01 23")*,4',$"(5*&-'",'6+$4'0*-0'+6+&,' $",+.#

!#$%&'(%))*#+$',$*--+$.'/*,0'0*-01 23)*,4',$(5*&-','6+$4'0*-0'+6+&,' $,+.# Università di Pisa!"#$%&'(%))*#+$',$*--+$.'/*,0'0*-01 23")*,4',$"(5*&-'",'6+$4'0*-0'+6+&,' $",+.#!"#!$$%&'#(#!"#)*+,'(#-"#.*/0*$122'(#3"#.*+%4'(#5"#.*6*46'$'(#7"#.*&*4'$$'(#!"#.1++'(#!"#.2*+8(#-"#9122:;+4%(#

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

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

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

Dirigido por: Susana Cabrera Urbán. Tesis Doctoral Junio 2014. Facultat de Física Departament de Física Atòmica Molecular i Nuclear

Dirigido por: Susana Cabrera Urbán. Tesis Doctoral Junio 2014. Facultat de Física Departament de Física Atòmica Molecular i Nuclear Measurement of the top quark pair production cross section in proton-proton collisions at center-of-mass energies of 7 TeV in final states with a τ lepton with the ATLAS detector María Teresa Pérez García-Estañ

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

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

Recent results from the ZEUS experiment

Recent results from the ZEUS experiment on behalf of the Collaboration Universität Hamburg, Institut für Experimentalphysik, Luruper Chaussee 49, 76 Hamburg, Germany E-mail: monica.turcato@desy.de A summary of the most recent results by the

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

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

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

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

Vrije Universiteit Brussel. Faculteit Wetenschappen Departement Natuurkunde

Vrije Universiteit Brussel. Faculteit Wetenschappen Departement Natuurkunde Vrije Universiteit Brussel Faculteit Wetenschappen Departement Natuurkunde Measurement of the top quark pair production cross section at the LHC with the CMS experiment Michael Maes Promotor Prof. Dr.

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

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

K. K. GAN. Stanford Linear Accelerator Center Stanford University, Stanford, California ABSTRACT

K. K. GAN. Stanford Linear Accelerator Center Stanford University, Stanford, California ABSTRACT SLAC - PUB - 4512 December 1987 (E) AN ANALYSIS OF THE p MASS SPECTRUM IN r DECAY* K. K. GAN Stanford Linear Accelerator Center Stanford University, Stanford, California 94305 ABSTRACT The p mass spectrum

More information

Jet Algorithms. Pierre-Antoine Delsart. February 27, LPSC Grenoble. P.A. Delsart (LAPP) Jet Algorithms February 27, / 13

Jet Algorithms. Pierre-Antoine Delsart. February 27, LPSC Grenoble. P.A. Delsart (LAPP) Jet Algorithms February 27, / 13 Jet Algorithms Pierre-Antoine Delsart LPSC Grenoble February 27, 2009 P.A. Delsart (LAPP) Jet Algorithms February 27, 2009 1 / 13 Introduction Jets are due to QCD interactions Several level of jets partons

More information

Precise measurements of the proton structure towards the new physics discoveries at the LHC

Precise measurements of the proton structure towards the new physics discoveries at the LHC June 2015 Precise measurements of the proton structure towards the new physics discoveries at the LHC Voica Radescu Physikalisches Institut Heidelberg Early ideas Ideas for detecting quarks were formulated

More information

Delphes, a framework for fast simulation of a general purpose LHC detector

Delphes, a framework for fast simulation of a general purpose LHC detector Delphes, a framework for fast simulation of a general purpose LHC detector S. Ovyn and X. Rouby Center for Particle Physics and Phenomenology (CP3) Université catholique de Louvain B-1348 Louvain-la-Neuve,

More information

ATLAS Test Beam Analysis in Stockholm: An Overview

ATLAS Test Beam Analysis in Stockholm: An Overview ATLAS Test Beam Analysis in Stockholm: An Overview Elin Bergeås, Stockholm University Stand-alone test beam 2003 and before - test beam targeted at TileCal modules only Combined test beam 2004 - test beam

More information

JET ENERGY CALIBRATION IN ATLAS

JET ENERGY CALIBRATION IN ATLAS JET ENERGY CALIBRATION IN ATLAS by Douglas William Schouten B.Sc., University of British Columbia, 2004 a thesis submitted in partial fulfillment of the requirements for the degree of Master of Science

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

Searching for the Building Blocks of Matter

Searching for the Building Blocks of Matter 1 Searching for the Building Blocks of Matter Building Blocks of Matter The Smallest Scales Physicists at Fermilab are searching for the smallest building blocks of matter and determining how they interact

More information

1 Anomalies and the Standard Model

1 Anomalies and the Standard Model 1 Anomalies and the Standard Model The Glashow-Weinberg-Salam model of the electroweak interactions has been very successful in explaining a wide range of experimental observations. The only major prediction

More information

1. χ 2 minimization 2. Fits in case of of systematic errors

1. χ 2 minimization 2. Fits in case of of systematic errors Data fitting Volker Blobel University of Hamburg March 2005 1. χ 2 minimization 2. Fits in case of of systematic errors Keys during display: enter = next page; = next page; = previous page; home = first

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

Measurement of the t -Channel Single Top-Quark Production Cross-Section with the ATLAS Detector at s = 7 TeV

Measurement of the t -Channel Single Top-Quark Production Cross-Section with the ATLAS Detector at s = 7 TeV FACHBEREICH MAHEMAIK UND NAURWISSENSCHAFEN FACHGRUPPE PHYSIK BERGISCHE UNIVERSIÄ WUPPERAL Measurement of the t -Channel Single op-quark Production Cross-Section with the ALAS Detector at s = 7 ev Dissertation

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

Electron Muon Ranger (EMR) Software Development

Electron Muon Ranger (EMR) Software Development Electron Muon Ranger (EMR) Software Development François Drielsma on behalf of the EMR Group University of Geneva June 25, 2014 François Drielsma on behalf of the EMR Group Electron (University Muon of

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

Dissertation. Studies for a Top Quark Mass Measurement and Development of a Jet Energy Calibration with the ATLAS Detector. von.

Dissertation. Studies for a Top Quark Mass Measurement and Development of a Jet Energy Calibration with the ATLAS Detector. von. Dissertation Studies for a op Quark Mass Measurement and Development of a Jet Energy Calibration with the ALAS Detector von Andreas Jantsch eingereicht an der Fakultät für Physik echnische Universität

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

Vector-like quarks t and partners

Vector-like quarks t and partners Vector-like quarks t and partners Luca Panizzi University of Southampton, UK Outline Motivations and Current Status 2 Couplings and constraints 3 Signatures at LHC Outline Motivations and Current Status

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

Electron-Muon Ranger (EMR)

Electron-Muon Ranger (EMR) Electron-Muon Ranger (EMR) Ruslan Asfandiyarov MICE Video Conference April 11, 2013 Construction Construction quarter of the detector completed (12 planes) every plane tested (LED / Camera / image analysis)

More information

Electroweak effects in Higgs boson production

Electroweak effects in Higgs boson production Electroweak effects in Higgs boson production Frank Petriello University of Wisconsin, Madison w/c. Anastasiou, R. Boughezal 0811.3458 w/ W. Y. Keung, WIP Outline Brief review of experiment, theory for

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

Vertexing and tracking software at LHCb

Vertexing and tracking software at LHCb Vertexing and tracking software at LHCb The 23rd International Workshop on Vertex Detectors Mácha Lake, Doksy, Czech Republic Espen Eie Bowen on behalf of the LHCb Tracking group 18 th September 214 Table

More information

Research Management Plan (RMP) for the. STAR Heavy Flavor Tracker (HFT)

Research Management Plan (RMP) for the. STAR Heavy Flavor Tracker (HFT) Research Management Plan (RMP) for the STAR Heavy Flavor Tracker (HFT) Version 4 March 31, 2009 1. Introduction This document describes the plans of a group of institutions within the STAR collaboration

More information

Extensions of the Standard Model (part 2)

Extensions of the Standard Model (part 2) Extensions of the Standard Model (part 2) Prof. Jorgen D Hondt Vrije Universiteit Brussel Inter-university Institute for High Energies Content: The Higgs sector of the Standard Model and extensions Theoretical

More information

Dealing with systematics for chi-square and for log likelihood goodness of fit statistics

Dealing with systematics for chi-square and for log likelihood goodness of fit statistics Statistical Inference Problems in High Energy Physics (06w5054) Banff International Research Station July 15 July 20, 2006 Dealing with systematics for chi-square and for log likelihood goodness of fit

More information

Rare Decays of Tau Leptons: an Experimental Review

Rare Decays of Tau Leptons: an Experimental Review Jon Urheim School of Physics and Astronomy, University of Minnesota Minneapolis, MN 55455, USA I review the current experimental situation with regard to searches for rare decays of τ leptons. The recent

More information

Tracking/Vertexing/BeamSpot/b-tag Results from First Collisions (TRK-10-001)

Tracking/Vertexing/BeamSpot/b-tag Results from First Collisions (TRK-10-001) Tracking/Vertexing/BeamSpot/b-tag Results from First Collisions (TRK-1-1) Yanyan Gao, Fermilab on behalf of Tracking-Btagging POGs 3 March 21 / CERN CMS General Weekly Meeting: GWM8 Contributors and Acknowledgement

More information

Particle Physics. Bryan Webber University of Cambridge. IMPRS, Munich. 19-23 November 2007

Particle Physics. Bryan Webber University of Cambridge. IMPRS, Munich. 19-23 November 2007 Monte Carlo Methods in Particle Physics University of Cambridge IMPRS, Munich 19-23 November 2007 See also ESW: QCD and Collider Physics, C.U.P. 1996 http://www.hep.phy.cam.ac.uk/theory/webber/qcdupdates.html

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