Search for Higgs bosons

Size: px
Start display at page:

Download "Search for Higgs bosons"

Transcription

1 Dezső Horváth: Search for Higgs bosons Balaton Summer School, Balatongyörök, p. 1/25 Search for Higgs bosons Balaton Summer School, Balatongyörök, Dezső Horváth MTA KFKI Research Institute for Particle and Nuclear Physics, Budapest and Institute of Nuclear Research, Debrecen

2 Dezső Horváth: Search for Higgs bosons Balaton Summer School, Balatongyörök, p. 2/25 The SM Higgs boson The Higgs mechanism of the Standard Model 1 complex doublet field 4 degrees of freedom 3 masses (W ±, Z) + H V min at φ = v 246 GeV = vacuum expectation value Spin = 0, neutral, heavy particle, no quantum numbers ( 0 v ) Does it exist at all? According to theory it must exist as it creates mass (for the leptons, quarks and weak bosons) and helps to eliminate divergencies of the SM

3 Dezső Horváth: Search for Higgs bosons Balaton Summer School, Balatongyörök, p. 3/25 pontaneous symmetry breaking mass Free fermion Higgs boson David J. Miller and CERN: djm/higgsa.html

4 Dezső Horváth: Search for Higgs bosons Balaton Summer School, Balatongyörök, p. 4/25 The SM Higgs boson SM gives its production and decay probabilities, but not its mass. Everything depends on mass, e.g. for its decay to a fermion pair Γ(H ff) = N cg 2 m 2 f β 3 m 32πm 2 H prefers heavy particles W N c : nr. of colours (leptons: 1; quarks: 3) g coupling constant β 2 = 1 4 m2 f m 2 H fermion velocity (c = 1). SM does not predict H mass, just limits 30 GeV < < 500 GeV (unitarity) If SM works up to E GUT GeV: 130 GeV < < 190 GeV (GUT: Grand Unification Theory)

5 Dezső Horváth: Search for Higgs bosons Balaton Summer School, Balatongyörök, p. 5/25 What is measured: cross section Bombarding particle beam Target σ = W/Φ transition probability/flux Unit: 1 barn = m 2 (1 pb = m 2 ) Flux = particle density velocity in beam: Φ = n b v b = particles/surface/sec

6 Dezső Horváth: Search for Higgs bosons Balaton Summer School, Balatongyörök, p. 6/25 What is observed: resonance τ = Γ 1 lifetime exp. decay: N(t) = N 0 e Γt Probability distribution: χ(e) 2 = 1 (E M) 2 +Γ 2 /4 Breit-Wigner equation M Γ resonance centre width ( = 1, c = 1) Lorentz curve New particle discovery: resonance at decay energy corresponding to the particle mass

7 Dezső Horváth: Search for Higgs bosons Balaton Summer School, Balatongyörök, p. 7/25 Where is the Higgs boson? By-product of spontaneous symmetry breaking of the SM Most wanted particle of physics as the only missing piece of the Standard Model. Experimentally not (yet?) observed, LEP: M(H) > GeV It was in that my life as a boson really began Peter Higgs: My Life as a Boson: The Story of The Higgs, Int. J. Mod. Phys. A 17 Suppl. (2002)

8 Dezső Horváth: Search for Higgs bosons Balaton Summer School, Balatongyörök, p. 8/25 Decay of SM Higgs boson Too large H mass too large width field distribution in negative mass region unitarity problem

9 Dezső Horváth: Search for Higgs bosons Balaton Summer School, Balatongyörök, p. 9/25 SM fit Higgs mass (2005!) Γ Z σ 0 had [nb] A l (A 0,l FB) A 0,b FB R 0 l A 0,l FB A l (P τ ) A 0,c FB Measurement Measurement α (5) had = ± α s = ± m t = ± 4.3 GeV α (5) had = ± α s = ± m t = ± 4.3 GeV σ 0 lep [nb] A l (SLD)

10 Dezső Horváth: Search for Higgs bosons Balaton Summer School, Balatongyörök, p. 10/25 What is the mass of the Higgs boson? Theoretical estimations Collection of Zoltán Trócsányi (Debrecen University)

11 Dezső Horváth: Search for Higgs bosons Balaton Summer School, Balatongyörök, p. 11/25 Hunting the Higgs boson Compose a complete SM background using Monte Carlo simulation taking all types of possible events normalized to their cross-sections. Higgs signal: simulation of all possible production and decay processes with all possible Higgs-boson masses Put all these through the detector simulation to get events analogous to the measured ones. Optimize the event selection: reduce background, enhance signal E.g. signal/sqrt(background) = max. Calculate at experimental luminosity expected nr. of events for signal and background at various conditions. SM background experiment? (YES / NO ).

12 Dezső Horváth: Search for Higgs bosons Balaton Summer School, Balatongyörök, p. 12/25 Search for the Higgs boson Is the experiment signal-like? Compare properties of experimental events with simulation, get probabilities of signal- and background-likeness. Sum up for all events: whole experiment is how much signal-like or background-like. Combine the results of various measurements. Many candidate events signal-like; few ones background-like. Statistical (physical/philosophical) problem: What if there are fewer observed events than the expected background? And what if more than the expected background + signal?

13 Dezső Horváth: Search for Higgs bosons Balaton Summer School, Balatongyörök, p. 13/25 σ (pb) Higgs-strahlung SM prediction: Dominant formation at LEP: e + e Z 0 H 0 Dominant decay ( 0 < 2M W ±): H 0 bb (83 %) e + e - HZ e + e - hadrons Born e + e - µ + µ - 60 WW ZZ m h = 70 GeV σ(e + e ZH) s Branching Ratio bb ττ gg cc WW ZZ Branching ratio: H XX tt

14 Dezső Horváth: Search for Higgs bosons Balaton Summer School, Balatongyörök, p. 14/25 Higgs search at LEP: final states Z decay H decay channel fraction Z qq H 0 bb qqbb 61% Z νν H 0 bb bb + E mis 17% Z e + e H 0 bb bb + e + e 3% Z µ + µ H 0 bb bb + µ + µ 3% Z τ + τ H 0 bb bb + τ + τ 3% Z qq H 0 τ + τ bb + τ + τ 5% Total covered 92%

15 Dezső Horváth: Search for Higgs bosons Balaton Summer School, Balatongyörök, p. 15/25 Identifying the b quark Cascade decay preferred: b W c; c W d; W lν or qq long lifetime secondary vertex, soft leptons

16 ALEPH event (e + e HZ bbqq) Dezső Horváth: Search for Higgs bosons Balaton Summer School, Balatongyörök, p. 16/25

17 Dezső Horváth: Search for Higgs bosons Balaton Summer School, Balatongyörök, p. 17/25 The Higgs boson is not seen 1-CL b ALEPH Observed Expected signal+background Expected background (GeV/c 2 ) 2σ 3σ 4σ 1-CL b DLO Observed Expected signal+background Expected background (GeV/c 2 ) 2σ 3σ 4σ Expected and observed signal confidence level assuming background only (ALEPH, DELPHI, L3 and OPAL: Phys. Lett. B 565 (2003) ) Excess in ALEPH s 4-jet events at 115 GeV: E LEP2000 = 206 GeV (115) + m Z (91) = 206 GeV!!

18 L3 event (e + e HZ bbνν) Dezső Horváth: Search for Higgs bosons Balaton Summer School, Balatongyörök, p. 18/25

19 LEP: exclusion by experiment Dezső Horváth: Search for Higgs bosons Balaton Summer School, Balatongyörök, p. 19/25

20 LEP: exclusion by channel Dezső Horváth: Search for Higgs bosons Balaton Summer School, Balatongyörök, p. 20/25

21 Dezső Horváth: Search for Higgs bosons Balaton Summer School, Balatongyörök, p. 21/25 Sensitivity of SM to Higgs mass SM fit (all data, 2009): +36 M H = GeV Lower limit (uncertainty of theory and expt): M H > 163 GeV (95 % CL) LEP search: M H > GeV Tevatron (2009): excl GeV If normalized to allowed region: < M H < 191 GeV (95% CL) χ March 2009 Theory uncertainty α had = α (5) ± ± incl. low Q 2 data Excluded Preliminary m Limit = 163 GeV LEP Electroweak Working Group (http://lepewwg.web.cern.ch/)

22 Dezső Horváth: Search for Higgs bosons Balaton Summer School, Balatongyörök, p. 22/25 SM fit Higgs mass: Theory uncertainty α (5) α had = ± ± incl. low Q 2 data Theory uncertainty α had = α (5) ± ± incl. low Q 2 data m Limit = 144 GeV χ 2 3 χ Excluded Excluded Preliminary : m t = 174 GeV 2007: m t = 172 GeV 2009: m t = 173 GeV LHC!!

23 Dezső Horváth: Search for Higgs bosons Balaton Summer School, Balatongyörök, p. 23/25 SM Higgs: M H M t 200 March High Q 2 except m t 68% CL High Q 2 except m t 68% CL m t 180 m t (Tevatron) m t 180 m t (Tevatron) 160 Excluded Excluded evatron, 2004: m t = 178 GeV 2009: m t = 173 GeV

24 Dezső Horváth: Search for Higgs bosons Balaton Summer School, Balatongyörök, p. 24/25 SM Higgs: M H M W 80.5 High Q 2 except m W /Γ W 68% CL 80.5 March 2009 High Q 2 except m W /Γ W 68% CL m W 80.4 m W (LEP2 prel., pp ) m W 80.4 m W (LEP2, Tevatron) 80.3 Excluded Excluded LHC, : top physics!! 2009

25 Dezső Horváth: Search for Higgs bosons Balaton Summer School, Balatongyörök, p. 25/25 Acknowledgement National Office for Research and Development OTKA NK67974, K72172 and H07C EU FP6 MC-ToK and III Nice collaborating partners

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

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

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

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

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

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

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

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

Probing Majorana Phases and Neutrino Mass Spectrum in the Higgs Triplet Model at the LHC

Probing Majorana Phases and Neutrino Mass Spectrum in the Higgs Triplet Model at the LHC Probing Majorana Phases and Neutrino Mass Spectrum in the Higgs Triplet Model at the LHC Andrew Akeroyd National Cheng Kung University, Tainan, Taiwan TeV scale mechanisms ( testable ) for neutrino mass

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

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

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

The Higgs Particle, Pivot of the Standard Model of the Subatomic Particles

The Higgs Particle, Pivot of the Standard Model of the Subatomic Particles The Higgs Particle, Pivot of the Standard Model of the Subatomic Particles Utrecht University Gerard t Hooft, Public Lecture, Sendai, April 24, 2015 CERN European Center for Nuclear Research LHC Large

More information

A SUSY SO(10) GUT with 2 Intermediate Scales

A SUSY SO(10) GUT with 2 Intermediate Scales A SUSY SO(10) GUT with 2 Intermediate Scales Manuel Drees Bonn University & Bethe Center for Theoretical Physics SUSY SO(10) p. 1/25 Contents 1 Motivation: SO(10), intermediate scales SUSY SO(10) p. 2/25

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

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

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

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

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

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

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

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

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

Introduction: Measurements in Particle Physics

Introduction: Measurements in Particle Physics Subatomic Physics: Particle Physics Lecture 2 Introduction to Measurements in Particle Physics Measuring properties of particles and interactions Particle quantum numbers and conservation laws Review of

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

Search for spin-0 resonances in t t mass spectrum

Search for spin-0 resonances in t t mass spectrum Search for spin- resonances in t t mass spectrum Sébastien Brochet 1, Anne-Laure Pequegnot 1, Stéphane Perries 1, Viola Sordini 1 1 Institut de Physique Nucléaire de Lyon - Université Claude Bernard Lyon

More information

Strategies towards a precise measurements of the top-quark mass

Strategies towards a precise measurements of the top-quark mass La Thuile, February 2013 Strategies towards a precise measurements of the top-quark mass Peter Uwer GK1504 Outline 1. Motivation and introduction 2. Alternative methods 3. Summary Peter Uwer (HU Berlin)

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

Quick Overview: 1. R/ -SUSY. Why bother? 2. L/ in PYTHIA Trigger studies. 4. Sensitivity Estimates. 5. Summary & Outlook.

Quick Overview: 1. R/ -SUSY. Why bother? 2. L/ in PYTHIA Trigger studies. 4. Sensitivity Estimates. 5. Summary & Outlook. L-Violating Supersymmetry Preliminary Studies and Pythia 6.2 Peter Z. Skands (zeiler@thep.lu.se) Niels Bohr Institute - Experimental High Energy Physics Lund University - Theoretical High Energy Physics

More information

Fundamental Particles, Fundamental Questions. Elizabeth H. Simmons Dean and Professor, Lyman Briggs College

Fundamental Particles, Fundamental Questions. Elizabeth H. Simmons Dean and Professor, Lyman Briggs College Fundamental Particles, Fundamental Questions Elizabeth H. Simmons Dean and Professor, Lyman Briggs College The smallest pieces of matter Nuclear physics and particle physics study the smallest known building

More information

PX434 Physics of the Standard Model Dr Steven Boyd : P448. ATLAS Event Display

PX434 Physics of the Standard Model Dr Steven Boyd : P448. ATLAS Event Display PX434 Physics of the Standard Model Dr Steven Boyd : P448 ATLAS Event Display Intro Stuff Lectures are divided in chapters each chapter has a writeup which will be put online There is a module homepage

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

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

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

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

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

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

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

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

Selected Topics in Elementary Particle Physics ( Haupt-Seminar )

Selected Topics in Elementary Particle Physics ( Haupt-Seminar ) Selected Topics in Elementary Particle Physics ( Haupt-Seminar ) Paola Avella, Veronika Chobanova, Luigi Li Gioi, Christian Kiesling, Hans-Günther Moser, Martin Ritter, Pit Vanhoefer Time: Do, 12 ct -14

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

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

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

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

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

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

Channels & Challenges New Physics at LHC

Channels & Challenges New Physics at LHC Channels & Challenges New Physics at LHC Jürgen Reuter Carleton University, Ottawa Southampton, 15. January 2007 The success of the Standard Model Standard Model describes microcosm gauge interactions:

More information

High Energy Frontier Recent Results from the LHC. Lecture 3

High Energy Frontier Recent Results from the LHC. Lecture 3 High Energy Frontier Recent Results from the LHC University of Heidelberg WS 2012/13 Lecture 3 LHC-Searches II Supersymmetry 1 Please Register! https://uebungen.physik.uni-heidelberg.de/v/339 2 Searches

More information

Right-handed neutrinos

Right-handed neutrinos Right-handed neutrinos O. Steinkamp, N. Serra, B. Storaci Flavor physics Neutrino oscillations: Last Lecture Interpretation of neutrino mixing in two and three neutrino family formalism Neutrino oscillation

More information

FINDING SUPERSYMMETRY AT THE LHC

FINDING SUPERSYMMETRY AT THE LHC FINDING SUPERSYMMETRY AT THE LHC Tilman Plehn MPI München & University of Edinburgh TeV scale supersymmetry Signals at Tevatron and LHC Measurements at LHC SUSY parameters at LHC (and ILC) Tilman Plehn:

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

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

Large Hadron Collider:

Large Hadron Collider: Dezső Horváth: LHC: Computing and its Hungarian Contribution NorduGrid 2008, Budapest, 27 Oct 2008. p. 1/30 Large Hadron Collider: Computing and its Hungarian Contribution Dezső Horváth horvath@rmki.kfki.hu

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

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-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

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

The Missing Universe. Robin Aggleton University of Bristol

The Missing Universe. Robin Aggleton University of Bristol The Missing Universe Robin Aggleton University of Bristol The Whole (?) Picture General relativity (gravity) See a range of 10 50 m Quantum mechanics? 2 Basic Questions Q: What is everything made of? Q:

More information

Testing CPT Invariance with Antiprotonic Helium

Testing CPT Invariance with Antiprotonic Helium Testing CPT Invariance with Antiprotonic Helium Dezső Horváth horvath@rmki.kfki.hu. KFKI Research Institute for Particle and Nuclear Physics, Budapest and Institute of Nuclear Research, Debrecen, Hungary

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

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 Flavor Puzzle. Wolfgang Altmannshofer Colloquium Aspen Center for Physics. June 26, 2014

The Flavor Puzzle. Wolfgang Altmannshofer Colloquium Aspen Center for Physics. June 26, 2014 The Flavor Puzzle Wolfgang Altmannshofer waltmannshofer@perimeterinstitute.ca Colloquium Aspen Center for Physics June 26, 2014 Wolfgang Altmannshofer The Flavor Puzzle June 26, 2014 1 / 40 The Search

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

Introduction to SME and Scattering Theory. Don Colladay. New College of Florida Sarasota, FL, 34243, U.S.A.

Introduction to SME and Scattering Theory. Don Colladay. New College of Florida Sarasota, FL, 34243, U.S.A. June 2012 Introduction to SME and Scattering Theory Don Colladay New College of Florida Sarasota, FL, 34243, U.S.A. This lecture was given at the IUCSS summer school during June of 2012. It contains a

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

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

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

Searches for Extra Dimensions, Leptoquarks, and Technicolor at the LHC

Searches for Extra Dimensions, Leptoquarks, and Technicolor at the LHC Searches for Extra Dimensions, Leptoquarks, and Technicolor at the LHC Sergio Grancagnolo Humboldt-Universitaet zu Berlin Rencontres de Blois on "Particle Physics and Cosmology" Extra Dimensions Arkani-Hamed,

More information

Kinematic Tau Reconstruction and Search For The Higgs Boson in Hadronic Tau Pair Decays with the CMS Experiment

Kinematic Tau Reconstruction and Search For The Higgs Boson in Hadronic Tau Pair Decays with the CMS Experiment Kinematic Tau Reconstruction and Search For The Higgs Boson in Hadronic Tau Pair Decays with the CMS Experiment Von der Fakultät für Mathematik, Informatik und Naturwissenschaften der Rheinisch- Westfälischen

More information

The ASACUSA (AD-3) experiment

The ASACUSA (AD-3) experiment The ASACUSA (AD-3) experiment Dezső Horváth KFKI Research Institute for Particle and Nuclear Physics, Budapest and Institute of Nuclear Research (ATOMKI), Debrecen The ASACUSA collaboration at CERN p-he

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

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

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

Higgs and Electroweak Physics

Higgs and Electroweak Physics Higgs and Electroweak Physics [theory summary] Southampton University & Rutherford Appleton LAB WIN2015 June 12, 2015, MPIK Heidelberg 1 Present: impressive success of LHC RUN 1 on the Higgs&EW Physics

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

Antimatter Experiments at CERN

Antimatter Experiments at CERN Dezső Horváth Antimatter FFK-2014, 1-5 December 2014, Dubna, Russia p. 1/24 Antimatter Experiments at CERN Dezső Horváth horvath.dezso@wigner.mta.hu Wigner Research Centre for Physics, Institute for Particle

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

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

ffmssmsc a C++ library for spectrum calculation and renormalization group analysis of the MSSM

ffmssmsc a C++ library for spectrum calculation and renormalization group analysis of the MSSM ffmssmsc a C++ library for spectrum calculation and renormalization group analysis of the MSSM Alexei Sheplyakov Joint Institute for Nuclear Research, Dubna, Russia SUSY 07 Karlsruhe, July 31, 2007 version

More information

Higgs Recoil Mass and Cross-Section Analysis at ILC AND Calibration of the CALICE SiW ECAL Prototype

Higgs Recoil Mass and Cross-Section Analysis at ILC AND Calibration of the CALICE SiW ECAL Prototype Higgs Recoil Mass and Cross-Section Analysis at ILC AND Calibration of the CALICE SiW ECAL Prototype H. Li To cite this version: H. Li. Higgs Recoil Mass and Cross-Section Analysis at ILC AND Calibration

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

Distributed analysis for the ATLAS Experiment in the S.Co.P.E Project

Distributed analysis for the ATLAS Experiment in the S.Co.P.E Project FINAL WORKSHOP OF GRID PROJECTS, PON RICERCA 2000-2006, AVVISO 1575 1 Distributed analysis for the ATLAS Experiment in the S.Co.P.E Project A. Aloisio 1,2, M. Alviggi 1,2, M. Biglietti 1,2, V. Canale 1,2,

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

Standard Model of Particle Physics

Standard Model of Particle Physics Standard Model of Particle Physics Chris Sachrajda School of Physics and Astronomy University of Southampton Southampton SO17 1BJ UK SUSSP61, St Andrews August 8th 3rd 006 Contents 1. Spontaneous Symmetry

More information

Higgs Vacuum Stability & Physics Beyond the Standard Model

Higgs Vacuum Stability & Physics Beyond the Standard Model Higgs Vacuum Stability & Physics Beyond the Standard Model Archil Kobakhidze AK & A. Spencer-Smith, Phys Lett B 722 (2013) 130 [arxiv:1301.2846] AK & A. Spencer-Smith, JHEP 1308 (2013) 036 [arxiv:1305.7283]

More information

The Higgs Boson. Linac08 Victoria BC, Canada CANADA S NATIONAL LABORATORY FOR PARTICLE AND NUCLEAR PHYSICS

The Higgs Boson. Linac08 Victoria BC, Canada CANADA S NATIONAL LABORATORY FOR PARTICLE AND NUCLEAR PHYSICS CANADA S NATIONAL LABORATORY FOR PARTICLE AND NUCLEAR PHYSICS Owned and operated as a joint venture by a consortium of Canadian universities via a contribution through the National Research Council Canada

More information

How NOT to do a data analysis

How NOT to do a data analysis How NOT to do a data analysis The Physics case: neutrinoless double beta decay The experimental apparatus The reported results A critical review of the analysis The ROOT code A. Fontana and P. Pedroni

More information

ASACUSA: Measuring the Antiproton Mass and Magnetic Moment

ASACUSA: Measuring the Antiproton Mass and Magnetic Moment Dezső Horváth ASACUSA ECFA, 4 October 2013, Wigner FK, Budapest p. 1/19 ASACUSA: Measuring the Antiproton Mass and Magnetic Moment Dezső Horváth on behalf of the ASACUSA Collaboration horvath.dezso@wigner.mta.hu

More information

STRING THEORY: Past, Present, and Future

STRING THEORY: Past, Present, and Future STRING THEORY: Past, Present, and Future John H. Schwarz Simons Center March 25, 2014 1 OUTLINE I) Early History and Basic Concepts II) String Theory for Unification III) Superstring Revolutions IV) Remaining

More information

REALIZING EINSTEIN S DREAM Exploring Our Mysterious Universe

REALIZING EINSTEIN S DREAM Exploring Our Mysterious Universe REALIZING EINSTEIN S DREAM Exploring Our Mysterious Universe The End of Physics Albert A. Michelson, at the dedication of Ryerson Physics Lab, U. of Chicago, 1894 The Miracle Year - 1905 Relativity Quantum

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

Axion/Saxion Cosmology Revisited

Axion/Saxion Cosmology Revisited Axion/Saxion Cosmology Revisited Masahiro Yamaguchi (Tohoku University) Based on Nakamura, Okumura, MY, PRD77 ( 08) and Work in Progress 1. Introduction Fine Tuning Problems of Particle Physics Smallness

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

Why the high lying glueball does not mix with the neighbouring f 0. Abstract

Why the high lying glueball does not mix with the neighbouring f 0. Abstract Why the high lying glueball does not mix with the neighbouring f 0. L. Ya. Glozman Institute for Theoretical Physics, University of Graz, Universitätsplatz 5, A-800 Graz, Austria Abstract Chiral symmetry

More information

Kísérleti eszközök fejlesztése a nagyenergiájú fizika számára. Development of experimental methods for the high-energy physics.

Kísérleti eszközök fejlesztése a nagyenergiájú fizika számára. Development of experimental methods for the high-energy physics. Kísérleti eszközök fejlesztése a nagyenergiájú fizika számára Töltött Higgs-bozon keresése a CERN-i L3 detektornál és precíziós helyzetmeghatározó-rendszer építése a CERN-i CMS detektor Müon rendszeréhez

More information

PHOTOS as a pocket parton shower: flexibility tests for the algorithm

PHOTOS as a pocket parton shower: flexibility tests for the algorithm PHOTOS as a pocket parton shower: flexibility tests for the algorithm Piotr Golonka and Zbigniew Was CERN, 1211 Geneva 23, Switzerland, and Institute of Nuclear Physics, ul. Radzikowskiego 152, 31-342

More information

Weak Interactions: towards the Standard Model of Physics

Weak Interactions: towards the Standard Model of Physics Weak Interactions: towards the Standard Model of Physics Weak interactions From β-decay to Neutral currents Weak interactions: are very different world CP-violation: power of logics and audacity Some experimental

More information

Matter and Antimatter: Not Quite a Mirror Image

Matter and Antimatter: Not Quite a Mirror Image Matter and Antimatter: Not Quite a Mirror Image (and some recent experimental results from the BABAR experiment at the Stanford Linear Accelerator Center) Patricia Burchat, Physics Department Stanford

More information

Introduction to Calorimetry / Calorimeter Design The ATLAS Calorimeters

Introduction to Calorimetry / Calorimeter Design The ATLAS Calorimeters ATLAS Calorimetry at the Large Hadron Collider Peter Krieger, University of Toronto / IPP Introduction to Calorimetry / Calorimeter Design The ATLAS Calorimeters Peter Krieger, University of Toronto WRNPPC

More information