Hunting for the Higgs Boson. Ulrich Heintz Brown University
|
|
|
- Madeline Smith
- 5 years ago
- Views:
Transcription
1 Hunting for the Higgs Boson Ulrich Heintz Brown University
2 the standard model electromagnetism acts on all charged particles strong force acts on all quarks weak force acts on all particles spin ½ spin 1 3/24/2011 Ulrich Heintz - Moriond QCD 2
3 gauge theories gauge theories describe all three interactions Lagrangian invariant under continuous group of local transformations quantum electrodynamics Lagrangian invariant under local phase transformations need interactions of charged particles with a gauge field exactly describes electromagnetic interactions the quantum of the gauge field is the photon photon is mediator of the electromagnetic force electroweak theory (Glashow 1960) gauge theory of QED and weak interactions larger symmetry group additional gauge field quanta: W ± and Z 0 bosons weak force is short range W and Z are massive e e ν νe γ ZW e e e eν PROBLEM: cannot describe massive particles without breaking the symmetry 3/24/2011 Ulrich Heintz - Moriond QCD 3
4 spontaneous symmetry breaking 1965 Higgs Guralnik Hagen Kibble Brout Englert introduce a field with a special potential continuously degenerate ground state at non-zero field field equations have same symmetry as theory every ground state breaks the symmetry can describe massive particles by coupling them with the Higgs field the quantum of this field is the Higgs boson Higgs mechanism 3/24/2011 Ulrich Heintz - Moriond QCD 4
5 not just a nice idea 1973 Gargamelle bubble chamber observes weak neutral current 1979 Glashow, Salam, Weinberg receive Nobel Prize for their theory of the unified weak and electromagnetic interaction 1983 UA1 and UA2 find the W and Z bosons at CERN the hunt for the Higgs boson starts 3/24/2011 Ulrich Heintz - Moriond QCD 5
6 properties of the Higgs boson spin 0 coupling to the Higgs gives particles mass Higgs couples to pairs of all massive particles and their antiparticles H µ + µ if 210 MeV < m H < 270 MeV H bb H WW if 9 GeV < m H < 135 GeV if 135 GeV < m H coupling is proportional to particle mass decays to most massive particles with 2m<m H 3/24/2011 Ulrich Heintz - Moriond QCD 6
7 the mass of the Higgs boson not predicted by the theory constraints from theory Triviality Vacuum Stability 3/24/2011 Ulrich Heintz - Moriond QCD 7
8 the mass of the Higgs boson not yet measured by experiment constraints from experiment global ewk fit consistency test of all measured parameters with standard model preferred mass 90 GeV 3/24/2011 Ulrich Heintz - Moriond QCD 8
9 theoretical problems there is no (other) elementary spin-0 particle corrections to Higgs mass diverge as Λ new physics must exist at TeV scale does it have to be one elementary scalar? Supersymmetry at least 4 Higgs bosons strong dynamics role of Higgs is played by a bound state of the new strong interaction does the Higgs boson exist? 3/24/2011 Ulrich Heintz - Moriond QCD 9
10 early Higgs searches in decays of other particles, e.g. Y H+γ events/20 MeV should see monochromatic line in photon energy spectrum CUSB CESR PRD 35, 2883(1987) photon energy (MeV) exclude m H < 5 GeV 3/24/2011 Ulrich Heintz - Moriond QCD 10
11 L3 ALEPH LEP CERN, Geneva OPAL DELPHI e + e - collisions 1989: E com = 91 GeV 2000: E com = 209 GeV 3/24/2011 Ulrich Heintz - Moriond QCD 11
12 Higgs production at LEP LEP 1 LEP 2 Björken process Higgsstrahlung Center of mass energy (GeV) 3/24/2011 Ulrich Heintz - Moriond QCD 12
13 Higgs decay look for Z+Higgs M M H H < < 2m 2m π b H H e + e or gg or cc µ + µ or τ + τ M H < 2M W H bb e, µ directly detectable τ - decays to other particles g,c,b form jets of particles easy to identify cannot measure total energy hard to identify 3/24/2011 Ulrich Heintz - Moriond QCD 13
14 and then 3/24/2011 Ulrich Heintz - Moriond QCD 14
15 signal or fluctuation? 3 selections with increasing purity for m H = 115 GeV Data 17 Bkg 15.8 Sig 7.1 Data 5 Bkg 3.9 Sig 3.8 for m H > 109 GeV Data 4 Bkg 1.2 Sig 2.2 3/24/2011 Ulrich Heintz - Moriond QCD 15
16 the final LEP result the results of the experiment were inconclusive so we had to use statistics... from Louis Lyon s book statistics for nuclear and particle physicists CLs small if data agree better with background only large if data agree better with signal+background signal can be excluded at 95% CL if CL s < 0.05 exclude m H < 114 GeV 3/24/2011 Ulrich Heintz - Moriond QCD 16
17 2000: the end of LEP 3/24/2011 Ulrich Heintz - Moriond QCD 17
18 Tevatron Fermilab, Chicago pp collisions E com 2 TeV 3/24/2011 Ulrich Heintz - Moriond QCD 18
19 Higgs production at Tevatron g t large cross section huge background H g q W/Z H q W Z small cross section moderate background 3/24/2011 Ulrich Heintz - Moriond QCD 19
20 Higgs search at Tevatron H bb H WW e ν 2 jets low mass Higgs m H < 135 GeV (H bb) background driven WH lνbb, ZH ll/ννbb µ ν 2 acollinear leptons high mass Higgs m H > 135 GeV (H WW) rate driven all production modes 3/24/2011 Ulrich Heintz - Moriond QCD 20
21 Higgs search at Tevatron ZH ννbb H WW backgrounds signal x 500 backgrounds signal x 10 M. Cooke this conference R. Lysak this conference need to use many observables combined into a discriminant variable this is a tough job! 3/24/2011 Ulrich Heintz - Moriond QCD 21
22 can we see such a small signal? observation of single top quark and WW production WW 3/24/2011 Ulrich Heintz - Moriond QCD 22
23 can we see such a small signal? WW production same final state as WH 3/24/2011 Ulrich Heintz - Moriond QCD 23
24 Tevatron Higgs limits J. Hays this conference 95% CL m H < GeV 158 < m H < 173 GeV 3/24/2011 Ulrich Heintz - Moriond QCD 24
25 will the Tevatron find the Higgs? M. Cooke this conference possibly exclude m H < 190 GeV 3/24/2011 Ulrich Heintz - Moriond QCD 25
26 LHC CMS pp collisions : E com = 7 TeV 2015: E com 14 TeV Alice ATLAS LHCb 3/24/2011 Ulrich Heintz - Moriond QCD 26
27 Higgs production at LHC Higgs production cross sections at LHC 3/24/2011 Ulrich Heintz - Moriond QCD 27
28 LHC projections for Higgs search mh < 130 GeV H γγ E com = 14 TeV 130 < mh < 190 GeV H W+W- llνν 190 < mh < 460 GeV H ZZ ll ll 460 < mh < 800 GeV H W+W- lνqq designed to discover Higgs with 100 < m H < 800 GeV 3/24/2011 Ulrich Heintz - Moriond QCD 28
29 the CMS experiment homogeneous electromagnetic calorimeter 78,000 lead tungstate crystals excellent photon energy resolution measure H γγ # of events / 0.5 GeV m H = 130 GeV L = 100 fb -1 M γγ (GeV) 3/24/2011 Ulrich Heintz - Moriond QCD 29
30 ATLAS 3/24/2011 Ulrich Heintz - Moriond QCD 30
31 LHC Operations 2010: delivered 45 pb -1 at E com = 7 TeV 2011: already delivered 20 pb -1 at E com = 7 TeV goal: 1-3 fb : E com 8 TeV 2015: E com 14 TeV 3/24/2011 Ulrich Heintz - Moriond QCD 31
32 first Higgs limits from LHC observed upper limit standard model prediction W. Quayle this conference exclude cross sections > 2.1 standard model prediction 3/24/2011 Ulrich Heintz - Moriond QCD 32
33 LHC projections W. Quayle this conference possibly exclude 130 < m H < 460 GeV 3/24/2011 Ulrich Heintz - Moriond QCD 33
34 the quest goes on the hunt for the Higgs boson has shaped particle physics experiments for the last three decades it still eludes detection LHC will find it (or exclude it) 3/24/2011 Ulrich Heintz - Moriond QCD 34
IX. Electroweak unification
IX. Electroweak unification The problem of divergence A theory of weak interactions only by means of W ± bosons leads to infinities e + e - γ W - W + e + W + ν e ν µ e - W - µ + µ Divergent integrals Figure
Introduction and Theoretical Background
Chapter 1 Introduction and Theoretical Background The Standard Model of particle physics has been tested by many experiments and has been shown to accurately describe particle interactions at the highest
Higgs Searches and Properties Measurement with ATLAS 杨海军 ( 上海交通大学 )
Higgs Searches and Properties Measurement with ATLAS 杨海军 ( 上海交通大学 ) 中国科学院大学 June 17, 2013 Outline Introduction of SM Higgs Searches at Tevatron, LEP and EW measurements ATLAS Experiment at LHC Higgs Production
The God particle at last? Astronomy Ireland, Oct 8 th, 2012
The God particle at last? Astronomy Ireland, Oct 8 th, 2012 Cormac O Raifeartaigh Waterford Institute of Technology CERN July 4 th 2012 (ATLAS and CMS ) A new particle of mass 125 GeV I The Higgs boson
The God particle at last? Science Week, Nov 15 th, 2012
The God particle at last? Science Week, Nov 15 th, 2012 Cormac O Raifeartaigh Waterford Institute of Technology CERN July 4 th 2012 (ATLAS and CMS ) A new particle of mass 125 GeV Why is the Higgs particle
Recent Results on New Phenomena and Higgs Searches at DZERO
Recent Results on New Phenomena and Higgs Searches at DZERO Neeti Parashar Louisiana Tech University Ruston, Louisiana U.S.A. 1 Outline Motivation for DØ Run II Detector at Fermilab The Fermilab Tevatron
The Why, What, and How? of the Higgs Boson
Modern Physics The Why, What, and How? of the Higgs Boson Sean Yeager University of Portland 10 April 2015 Outline Review of the Standard Model Review of Symmetries Symmetries in the Standard Model The
Higgs Searches and Properties Measurement with ATLAS. Haijun Yang (on behalf of the ATLAS) Shanghai Jiao Tong University
Higgs Searches and Properties Measurement with ATLAS Haijun Yang (on behalf of the ATLAS) Shanghai Jiao Tong University LHEP, Hainan, China, January 11-14, 2013 Outline Introduction of SM Higgs Searches
Bayes at the Frontier: The Promise and Challenges
: The Promise and Department of Physics, Florida State University September 21, 2012 Outline Introduction 1 Introduction 2 3 4 5 6 21st century astrophysics, cosmology, and high energy physics share many
Basics of Higgs Physics
Basics of iggs Physics Sven einemeyer, IFCA (Santander) Karlsruhe, 07/2007 1. The iggs Boson in the SM 2. The iggs Boson in the MSSM Sven einemeyer Basics of iggs Physics presusy07 (Karlsruhe) 23.07.2007
Search for Higgs Bosons at LEP. Haijun Yang University of Michigan, Ann Arbor
Search for Higgs Bosons at LEP Haijun Yang University of Michigan, Ann Arbor L3 On behalf of the L3 Collaboration American Physical Society Meeting(APS03), Philadelphia April 5-8, 2003 OUTLINE Introduction
Z boson studies at the ATLAS experiment at CERN. Giacomo Artoni Ph.D Thesis Project June 6, 2011
Z boson studies at the ATLAS experiment at CERN Giacomo Artoni Ph.D Thesis Project June 6, 2011 Outline Introduction to the LHC and ATLAS ((Very) Brief) Z boson history Measurement of σ Backgrounds Acceptances
STANDARD MODEL AND HIGGS BOSON
PHENIICS DAYS Title : Search for the Higgs boson decaying to two photons and produced in association with a pair of top quarks in the CMS experiment at LHC Thématique : Particle physics Encadrant CEA -
Physics at the TeV Scale Discovery Prospects Using the ATLAS Detector at the LHC
Physics at the TeV Scale Discovery Prospects Using the ATLAS Detector at the LHC Peter Krieger Carleton University Physics Motivations Experimental Theoretical New particles searches Standard Model Higgs
Tutorial 8: Discovery of the Higgs boson
Tutorial 8: Discovery of the Higgs boson Dr. M Flowerdew May 6, 2014 1 Introduction From its inception in the 1960 s, the Standard Model was quickly established, but it took about 50 years for all of the
The Standard Model Part. II
Our Story Thus Far The Standard Model Part. II!!We started with QED (and!)!!we extended this to the Fermi theory of weak interactions! Adding G F!!Today we will extended this to Glashow-Weinberg-Salam
Measurement of the Higgs Couplings by Means of an Exclusive Analysis of its Diphoton decay
Measurement of the Higgs Couplings by Means of an Exclusive Analysis of its Diphoton decay i.e. what do we know about the Higgs Marco Grassi The Discovery of a New Boson Evidence of a new boson with 5
- Chapter 1 - The Standard Model of Particle Physics
- Chapter 1 - The Standard Model of Particle Physics Section 1: Introduction and Overview Section 2: Theory recap about the SM Section 3: Measurements at the Z pole Section 4: Hadronic collision: a closer
Discovery of the Higgs Boson
Discovery of the Higgs Boson Seminar: Key Experiments in Particle Physics Martin Vogrin Munich, 22. July 2016 Outline Theoretical part Experiments Results Open problems Motivation The SM is really two
Lecture 03. The Standard Model of Particle Physics. Part II The Higgs Boson Properties of the SM
Lecture 03 The Standard Model of Particle Physics Part II The Higgs Boson Properties of the SM The Standard Model So far we talked about all the particles except the Higgs If we know what the particles
Results from the Tevatron: Standard Model Measurements and Searches for the Higgs. Ashutosh Kotwal Duke University
Results from the Tevatron: Standard Model Measurements and Searches for the Higgs Ashutosh Kotwal Duke University SLAC Summer Institute 31 July 2007 Why Build Accelerators? From Atoms to Quarks Scattering
Higgs Searches at CMS
Higgs Searches at CMS Ashok Kumar Department of Physics and Astrophysics University of Delhi 110007 Delhi, India 1 Introduction A search for the Higgs boson in the Standard Model (SM) and the Beyond Standard
The search for the (SM) Higgs Boson
Tevatron and LHC WS16/17 TUM S.Bethke, F. Simon V9: Search for the Higgs Boson (1) 1 Lecture 9: The search for the (SM) Higgs Boson theoretical basics Higgs production and decay Higgs search in e + e annihilation
PoS(EPS-HEP2011)250. Search for Higgs to WW (lνlν, lνqq) with the ATLAS Detector. Jonas Strandberg
with the ATLAS Detector Royal Institute of Technology, KTH, Stockholm, Sweden E-mail: jostran@kth.se Higgs boson searches in the H WW ( ) lνlν (l = e, µ) and the H WW ( ) lνqq decay modes, using. fb of
Particle Physics. Tommy Ohlsson. Theoretical Particle Physics, Department of Physics, KTH Royal Institute of Technology, Stockholm, Sweden
Particle Physics Tommy Ohlsson Theoretical Particle Physics, Department of Physics, KTH Royal Institute of Technology, Stockholm, Sweden International Baccalaureate T. Ohlsson (KTH) Particle Physics 1/
Potential Discoveries at the Large Hadron Collider. Chris Quigg
Potential Discoveries at the Large Hadron Collider Chris Quigg Fermilab quigg@fnal.gov XXIII Taiwan Spring School Tainan 31 March - 3 April 2010 Electroweak theory successes Theoretical Physics Department,
Combined Higgs Results
Chapter 2 Combined Higgs Results This chapter presents the combined ATLAS search for the Standard Model Higgs boson. The analysis has been performed using 4.7 fb of s = 7 TeV data collected in 2, and 5.8
Measurements of the Higgs Boson at the LHC and Tevatron
Measurements of the Higgs Boson at the LHC and Tevatron Somnath Choudhury (for the ATLAS, CMS, DØ and CDF collaborations) 44 th International Symposium on Multiparticle Dynamics 8 12 September 2014, Bologna
Genesis of Electroweak. Unification
Unification Tom Kibble Imperial College London ICTP October 2014 1 Outline Development of the electroweak theory, which incorporates the idea of the Higgs boson as I saw it from my standpoint in Imperial
ATLAS Discovery Potential of the Standard Model Higgs Boson
ATLAS Discovery Potential of the Standard Model Higgs Boson Christian Weiser University of Freiburg (on behalf of the ATLAS Collaboration) 14th Lomonosov Conference on Elementary Particle Physics Moscow,
Higgs searches at L3
Higgs searches at L3 D. Teyssier To cite this version: D. Teyssier. Higgs searches at L3. High Energy Physics Conference - HEP-MAD 0, Sep 200, Antananariv, Madagascar. World Scientific, pp.67-72, 2002.
Standard Model Higgs Searches at the Tevatron (Low Mass : M H ~140 GeV/c 2 )
Standard Model Higgs Searches at the Tevatron (Low Mass : M H ~140 GeV/c 2 ) For the CDF and Dø Collaborations Kohei Yorita University of Chicago The XLIIIrd Rencontres de Moriond EW La Thuile in Italy,
8.882 LHC Physics. Higgs Physics and Other Essentials. [Lecture 22, April 29, 2009] Experimental Methods and Measurements
![8.882 LHC Physics. Higgs Physics and Other Essentials. [Lecture 22, April 29, 2009] Experimental Methods and Measurements](/thumbs/93/111455275.jpg "8.882 LHC Physics. Higgs Physics and Other Essentials. [Lecture 22, April 29, 2009] Experimental Methods and Measurements")
8.882 LHC Physics Experimental Methods and Measurements Higgs Physics and Other Essentials [Lecture 22, April 29, 2009] Organization Next week lectures: Monday 2pm and Tuesday 9:30am (which room?) Project
Two-Higgs-doublet models with Higgs symmetry
Two-Higgs-doublet models with Higgs symmetry Chaehyun Yu a a School of Physics, KIAS, Seoul 130-722, Korea Abstract We investigate two-higgs-doublet models (2HDMs) with local U(1) H Higgs flavor symmetry
Particle physics today. Giulia Zanderighi (CERN & University of Oxford)
Particle physics today Giulia Zanderighi (CERN & University of Oxford) Particle Physics Particle Physics is fundamental research, as opposed to many applied sciences (medicine, biology, chemistry, nano-science,
Higgs cross-sections
Ph.D. Detailed Research Project Search for a Standard Model Higgs boson in the H ZZ ( ) 4l decay channel at the ATLAS Experiment at Cern Ph.D. Candidate: Giacomo Artoni Supervisor: Prof. Carlo Dionisi,
I. Antoniadis CERN. IAS CERN Novice Workshop, NTU, 7 Feb 2014
I. Antoniadis CERN IAS CERN Novice Workshop, NTU, 7 Feb 2014 1 2 3 the Large Hadron Collider (LHC) Largest scientific instrument ever built, 27km of circumference >10 000 people involved in its design
希格斯玻色子的发现和属性测量 杨海军 ( 上海交通大学, 代表 ATLAS 合作组 ) 中国物理学会秋季会议 2013 年 9 月 日
希格斯玻色子的发现和属性测量 杨海军 ( 上海交通大学, 代表 ATLAS 合作组 ) 中国物理学会秋季会议 2013 年 9 月 13-15 日 Outline Brief Introduction of Standard Model ATLAS Experiment at LHC Higgs Production and decays at LHC Major challenge for Higgs
arxiv:hep-ph/ v1 17 Apr 2000
SEARCH FOR NEW PHYSICS WITH ATLAS AT THE LHC arxiv:hep-ph/0004161v1 17 Apr 2000 V.A. MITSOU CERN, EP Division, CH-1211 Geneva 23, Switzerland and University of Athens, Physics Department, Nuclear and Particle
The God Particle and what it means. Peter Bussey. CiS Northern Meeting, April
The God Particle and what it means. Peter Bussey CiS Northern Meeting, April 27 2013 2010,2012 1993 Good publicity for an elementary particle! The CERN laboratory site, Geneva, Switzerland. Photographs
Search for WZ lνbb at CDF: Proving ground of the Hunt for the
Search for WZ lνbb at CDF: Proving ground of the Hunt for the Justin Keung University of Pennsylvania March 24 rd, 2010 HEP Seminar @ University of Virginia Outline Motivation: Higgs Boson Search Importance
PoS(ICHEP 2010)544. Higgs searches at the Tevatron. Ben Kilminster Fermilab bjk AT fnal.gov
Fermilab E-mail: bjk AT fnal.gov We present combined CDF and D searches for the Standard Model (SM) and Minimal Supersymmetric Standard Model (MSSM) Higgs boson using up to 6.7 fb of integrated luminosity
Higgs Prospects at the Upgraded Tevatron: Fermilab Study Results
Higgs Prospects at the Upgraded Tevatron: Fermilab Study Results John D. Hobbs for the Fermilab RunII SUSY/Higgs Working Group SUNY Stony Brook Preliminary results from a Fermilab study of the sensitivity
The Higgs Boson as a Probe of New Physics. Ian Lewis (University of Kansas)
The Higgs Boson as a Probe of New Physics Ian Lewis University of Kansas 1 July 4, 2012 ATLAS and CMS announce discovery of a new particle. Consistent with long sought-after Higgs boson. "We have reached
Search for the Higgs Boson at the LHC. Karl Jakobs Physikalisches Institut Universität Freiburg
Search for the Higgs Boson at the LHC Karl Jakobs Physikalisches Institut Universität Freiburg Outline of the talk:. Introduction, the Higgs boson in the Standard Model. The Standard Model Higgs boson
Searching for the Higgs at the Tevatron
Searching for the Higgs at the Tevatron 5 th May 2009 Particle Physics Seminar, Oxford Outline Introduction The challenges and analysis strategies Low mass SM Higgs searches High mass SM Higgs searches
String Theory in the LHC Era
String Theory in the LHC Era J Marsano (marsano@uchicago.edu) 1 String Theory in the LHC Era 1. Electromagnetism and Special Relativity 2. The Quantum World 3. Why do we need the Higgs? 4. The Standard
Weak Interactions. The Theory of GLASHOW, SALAM and WEINBERG
Weak Interactions The Theory of GLASHOW, SALAM and WEINBERG ~ 1959-1968 (Nobel 1979) Theory of the unified weak and electromagnetic interaction, transmitted by exchange of intermediate vector bosons mass
The search for standard model Higgs boson in ZH l + l b b channel at DØ
The search for standard model Higgs boson in ZH l + l b b channel at DØ University of Science and Technology of China E-mail: pengj@fnal.gov on behalf of the DØ collaboration We present a search for the
Study of Higgs Boson Decaying to Four Muons at s =14 TeV
Study of Higgs Boson Decaying to Four Muons at s =14 TeV R.M. Aly 1, A.A. Abdelalim 1,2, M.N.El-Bakrey 1 and A. Mahrous 1 1 Department of physics, Faculty of science, Helwan University, Cairo, Egypt. 2
Lecture 23. November 16, Developing the SM s electroweak theory. Fermion mass generation using a Higgs weak doublet
Lecture 23 November 16, 2017 Developing the SM s electroweak theory Research News: Higgs boson properties and use as a dark matter probe Fermion mass generation using a Higgs weak doublet Summary of the
Higgs Boson Physics at the Tevatron
Higgs Boson Physics at the Tevatron Koji Sato On Behalf of CDF and D0 Collaborations Windows on the Universe Qui Nhon, August 14, 2013 1 Tevatron Run II p p collisions at s = 1.96 TeV (1.8 TeV in Run I).
Discovery Potential for the Standard Model Higgs at ATLAS
IL NUOVO CIMENTO Vol.?, N.?? Discovery Potential for the Standard Model Higgs at Glen Cowan (on behalf of the Collaboration) Physics Department, Royal Holloway, University of London, Egham, Surrey TW EX,
Physics at the LHC: from Standard Model to new discoveries
Physics at the LHC: from Standard Model to new discoveries Kirill Melnikov University of Hawaii May 2006 Sendai, June 2006 Physics at the LHC: from Standard Model to new discoveries p. 1/22 Outline Standard
Electroweak unification
Electroweak unification Electroweak unification τ Experimental facts τ SU(2) L U(1) Y gauge theory τ Charged current interaction τ Neutral current interaction τ Gauge self-interactions III/1 Experimental
Overview. The quest of Particle Physics research is to understand the fundamental particles of nature and their interactions.
Overview The quest of Particle Physics research is to understand the fundamental particles of nature and their interactions. Our understanding is about to take a giant leap.. the Large Hadron Collider
Lecture 11. Weak interactions
Lecture 11 Weak interactions 1962-66: Formula/on of a Unified Electroweak Theory (Glashow, Salam, Weinberg) 4 intermediate spin 1 interaction carriers ( bosons ): the photon (γ) responsible for all electromagnetic
The ATLAS Detector at the LHC
The ATLAS Detector at the LHC Results from the New Energy Frontier Cristina Oropeza Barrera Experimental Particle Physics University of Glasgow Somewhere near the Swiss Alps... A Toroidal LHC ApparatuS
Identification of the Higgs boson produced in association with top quark pairs in proton-proton
Identification of the Higgs boson produced in association with top quark pairs in proton-proton collision: an analysis of the final state containing three leptons with the ATLAS detector Valentina Vecchio,
The Discovery of the Higgs Boson: one step closer to understanding the beginning of the Universe
The Discovery of the Higgs Boson: one step closer to understanding the beginning of the Universe Anna Goussiou Department of Physics, UW & ATLAS Collaboration, CERN Kane Hall, University of Washington
Upgrade of ATLAS and CMS for High Luminosity LHC: Detector performance and Physics potential
IL NUOVO CIMENTO 4 C (27) 8 DOI.393/ncc/i27-78-7 Colloquia: IFAE 26 Upgrade of ATLAS and CMS for High Luminosity LHC: Detector performance and Physics potential M. Testa LNF-INFN - Frascati (RM), Italy
Higgs Production at LHC
Higgs Production at LHC Vittorio Del Duca INFN LNF WONP-NURT La Habana 5 february 2013 CERN North Jura ATLAS Sketch of LHC North Ring 26,6 Km long and 3,8 m of diameter, made of 8 arches connected by 8
Higgs rush at CERN. Frank Filthaut Radboud University Nijmegen / Nikhef
Higgs rush at CERN Frank Filthaut Radboud University Nijmegen / Nikhef Contents: Particle physics: general picture The Higgs boson The recent results Particle Physics: the General Picture Going beyond
Discovery potential of the SM Higgs with ATLAS
Discovery potential of the SM Higgs with P. Fleischmann On behalf of the Collaboration st October Abstract The discovery potential of the Standard Model Higgs boson with the experiment at the Large Hadron
High Energy Tests of the Electroweak Theory
High Energy Tests of the Electroweak Theory Sabine Lammers Indiana University and TU-Dresden Eleanore Trefftz GastProfessorin TU-Dresden Colloquium January 7, 2014 What is particle physics? not subatomic
ETH Zurich HS Mauro Donegà: Higgs physics meeting name date 1
Higgs physics - lecture 3 ETH Zurich HS 2015 Mauro Donegà meeting name date 1 Practicalities mauro.donega@cern.ch pasquale.musella@cern.ch Moodle will store slides, exercises, papers and references Detailed
Last Friday: pp(bar) Physics Intro, the TeVatron
Last Friday: pp(bar) Physics Intro, the TeVatron Today: The Large Hadron Collider (LHC) The Large Hadron Collider (LHC) 7 TeV + 7 TeV Protons Protons 10 11 Protons per bunch Bunch Crossings 4x10 7 Hz Proton
Discovery Physics at the Large Hadron Collider
+ / 2 GeV N evt 4 10 3 10 2 10 CMS 2010 Preliminary s=7 TeV -1 L dt = 35 pb R > 0.15 R > 0.20 R > 0.25 R > 0.30 R > 0.35 R > 0.40 R > 0.45 R > 0.50 10 1 100 150 200 250 300 350 400 [GeV] M R Discovery
Search for Higgs in H WW lνlν
Search for Higgs in H WW lνlν John Alison University of Pennsylvania on behalf of the ATLAS Collaboration Higgs Physics Standard Model Remarkably Accurate Description Data. One Remaining Piece: Higgs Boson.
Phenomenology. Gavin P. Salam. BUSSTEPP Ambleside, August LPTHE, Universities of Paris VI and VII and CNRS
Phenomenology Gavin P. Salam LPTHE, Universities of Paris VI and VII and CNRS BUSSTEPP Ambleside, August 2005 Phenomenology Lecture 2 (Searching for the Higgs) Phenomenology: lecture 2 (p. 27) High-energy
Search for the Standard Model Higgs in H ZZ 4l channel with the CMS experiment
Journal of Physics: Conference Series OPEN ACCESS Search for the Standard Model Higgs in H ZZ 4l channel with the CMS experiment To cite this article: Nicola De Filippis and the CMS Collaboration 23 J.
The Higgs discovery - a portal to new physics
The Higgs discovery - a portal to new physics Department of astronomy and theoretical physics, 2012-10-17 1 / 1 The Higgs discovery 2 / 1 July 4th 2012 - a historic day in many ways... 3 / 1 July 4th 2012
Study of Higgs boson leptonic decay modes
Study of Higgs boson leptonic decay modes Windows on the Universe ICSE, Vietnam 11-17.08.2013 Pawel Brückman de Renstrom on behalf of the ATLAS, CMS, CDF, D0 Collaborations ( Institute of Nuclear Physics
Weak. interactions. V. Hedberg Weak Interactions 1
Weak interactions V. Hedberg Weak Interactions 1 The electroweak theory y Gauge invariant theories. y y=x 2 A y =x 2 x y =y x =-x x The equation y=x 2 is symmetric or invariant under the transformation
Physics at Hadron Colliders
Physics at Hadron Colliders Part 2 Standard Model Physics Test of Quantum Chromodynamics - Jet production - W/Z production - Production of Top quarks Precision measurements -W mass - Top-quark mass QCD
A first trip to the world of particle physics
A first trip to the world of particle physics Itinerary Massimo Passera Padova - 13/03/2013 1 Massimo Passera Padova - 13/03/2013 2 The 4 fundamental interactions! Electromagnetic! Weak! Strong! Gravitational
Weak. interactions. V. Hedberg Weak Interactions 1
Weak interactions V. Hedberg Weak Interactions 1 The electroweak theory y Gauge invariant theories. y y=x 2 A y =x 2 x y =y x =-x x The equation y=x 2 is symmetric or invariant under the transformation
Essentials of Particle Physics
Essentials of Particle Physics Kajari Mazumdar Department of High Energy Physics Tata Institute of Fundamental Research Mumbai http://www.tifr.res.in/~mazumdar Kajari.Mazumdar@gmail.com KSTA Lecture Series
CMS Higgs Results Adi Bornheim Caltech
CMS Higgs Results Adi Bornheim Caltech 06.04.2014 1 A brief history of recent times W & Z Boson t-quark H Boson 1964 1974 1984 1994 2004 2014 Peter Higgs This talk : Summary of 29 CMS publications and
The Compact Muon Solenoid Experiment. Conference Report. Mailing address: CMS CERN, CH-1211 GENEVA 23, Switzerland
Available on CMS information server CMS CR -08/036 he Compact Muon Solenoid Experiment Conference Report Mailing address: CMS CERN, CH GENEVA 3, Switzerland 30 April 08 (v4, 08 May 08) Measurement of the
Elementary Particles II
Elementary Particles II S Higgs: A Very Short Introduction Higgs Field, Higgs Boson, Production, Decays First Observation 1 Reminder - I Extend Abelian Higgs model to non-abelian gauge symmetry: ( x) +
Higgs searches in CMS
Higgs searches in CMS Mario Pelliccioni Istituto Nazionale di Fisica Nucleare Torino Miami 2012 17/12/12 Introduction Why do we even bother to look for the Higgs? An Higgs boson naturally emerges from
From the Discovery of the Higgs Boson to the Search for Dark Matter -New results from the LHC-
From the Discovery of the Higgs Boson to the Search for Dark Matter -New results from the LHC- Karl Jakobs Physikalisches Institut Universität Freiburg / Germany LHC and Data Taking, First look at the
Higgs couplings and mass measurements with ATLAS. Krisztian Peters CERN On behalf of the ATLAS Collaboration
Higgs couplings and mass measurements with ATLAS CERN On behalf of the ATLAS Collaboration July observation: qualitative picture A single state observed around ~125 GeV Qualitatively all observations consistent
Search for the Higgs boson in fermionic channels using the CMS detector
Search for the Higgs boson in fermionic channels using the CMS detector Centre for Cosmology, Particle Physics and Phenomenology (CP3) Université catholique de Louvain Chemin du Cyclotron, 2 B-1348, Louvain-la-Neuve
Lecture 39, 40 Supplement: Particle physics in the LHC era
Lecture 39, 40 Supplement: Particle physics in the LHC era The Matter Particles (Fermions) plus their antiparticles... What is measured? quarks confined into hadrons A zoo of strongly interacting particles...
Experimental verification of the Salaam-Weinberg model. Pásztor Attila, Eötvös University Experimental Particle Physics Student Seminar
Experimental verification of the Salaam-Weinberg model Pásztor Attila, Eötvös University Experimental Particle Physics Student Seminar Contents Theoretical considerations Discovery of W and Z bosons (and
The Higgs boson. Marina Cobal University of Udine
The Higgs boson Marina Cobal University of Udine Suggested books F.Halzen, A.D.Martin, Quarks & Leptons: An Introductory Course in Modern Particle Physics, Wiley 1984 Cap.14,15 W.E.Burcham,M.Jobes, Nuclear
Searching for the Higgs at the LHC
Searching for the Higgs at the LHC Philip Lawson Boston University - PY 898 - Special Topics in LHC Physics 3/16/2009 1 Outline Theory & Background of Higgs Mechanism Production Modes Decay Modes - Discovery
The Role and Discovery of the Higgs
The Role and Discovery of the Higgs David Clarke Abstract This paper summarizes the importance of the Higgs boson in QFT and outlines experiments leading up to the discovery of the Higgs boson. First we
Determination of Electroweak Parameters
Determination of Electroweak Parameters Seminar Particle Physics at the LHC Proceedings R. Gugel Freiburg, 27.05.2014 Contents 1 Motivation 1 2 Template Method 4 3 Mass of the W Boson 5 3.1 Measurement
Higgs boson searches in the H ττ channel
* On behalf of the CMS Collaboration DESY Hamburg, KIT E mail: agni.bethani@desy.de A search for Higgs bosons in decay channels with two τ leptons in the final state is described. The search is performed
Le Modèle Standard et ses extensions
Particules Élémentaires, Gravitation et Cosmologie Année 2007-08 08 Le Modèle Standard et ses extensions Cours III: 15 février f 2008 Weak Interactions: from Fermi s s model to a gauge theory 15 fevrier
Particle Physics: Introduction to the Standard Model
Particle Physics: Introduction to the Standard Model Electroweak measurements and the Higgs boson Frédéric Machefert frederic@cern.ch Laboratoire de l accélérateur linéaire (CNRS) Cours de l École Normale
7 Physics at Hadron Colliders
7 Physics at Hadron Colliders The present and future Hadron Colliders - The Tevatron and the LHC Test of the Standard Model at Hadron Colliders Jet, W/Z, Top-quark production Physics of Beauty Quarks (T.
How and Why to go Beyond the Discovery of the Higgs Boson
How and Why to go Beyond the Discovery of the Higgs Boson John Alison University of Chicago http://hep.uchicago.edu/~johnda/comptonlectures.html Lecture Outline April 1st: Newton s dream & 20th Century
Pedro Teixeira-Dias. Higgs Overview
Pedro Teixeira-Dias Higgs Overview UK HEP Forum Cosener s House, 20/9/2010 20/9/2010 Pedro Teixeira-Dias/RHUL UK HEP Forum Cosener s House 2 Overview LHC data taking at high energy started in 2010 First
The Standard Model and Beyond
The Standard Model and Beyond Nobuchika Okada Department of Physics and Astronomy The University of Alabama 2011 BCVSPIN ADVANCED STUDY INSTITUTE IN PARTICLE PHYSICS AND COSMOLOGY Huê, Vietnam, 25-30,
High Energy Physics. QuarkNet summer workshop June 24-28, 2013
High Energy Physics QuarkNet summer workshop June 24-28, 2013 1 The Birth of Particle Physics In 1896, Thompson showed that electrons were particles, not a fluid. In 1905, Einstein argued that photons
La ricerca dell Higgs Standard Model a CDF
La ricerca dell Higgs Standard Model a CDF Melisa Rossi INFN-TS Giornata di seminari INFN Trieste - 7 Luglio 2009 FNAL: Fermi National Accelerator Lab Tevatron currently provides the highest energy proton-antiproton