1 Higgs Mechanism 13.9.2007 - Cyril Topfel. 2 What to expect from this Presentation (Table of Contents) Some very limited theory explanation Higgs at.

Slides:

Advertisements

Similar presentations

Z’ Production in 331 models

Advertisements

Martin zur Nedden, HU Berlin 1 WS 2007/08: Physik am LHC 5. Higgs Searches The Higgs-mechanism in the SM Yukava-coupling, masses of fermions Higgs Production:

Experimental Particle Physics PHYS6011 Joel Goldstein, RAL 1.Introduction & Accelerators 2.Particle Interactions and Detectors (2) 3.Collider Experiments.

Higgs physics theory aspects experimental approaches Monika Jurcovicova Department of Nuclear Physics, Comenius University Bratislava H f ~ m f.

The elusive agent of electroweak symmetry breaking - an experimentalist point of view - Ulrich Heintz Brown University.

Recent Results on the Possibility of Observing a Standard Model Higgs Boson Decaying to WW (*) Majid Hashemi University of Antwerp, Belgium.

Higgs Searches using Vector Boson Fusion. 2 Why a “Low Mass” Higgs (1) M H

THE SEARCH FOR THE HIGGS BOSON Aungshuman Zaman Department of Physics and Astronomy Stony Brook University October 11, 2010.

3.Phenomenology of Two Higgs Doublet Models. Charged Higgs Bosons.

Hunting for New Particles & Forces. Example: Two particles produced Animations: QPJava-22.html u u d u d u.

30 August 04Lorenzo Feligioni1 Searches for Techniparticles at DØ Lorenzo Feligioni Boston University for the DØ collaboration.

On the Trail of the Higgs Boson Meenakshi Narain.

Jose E. Garcia presented by: Jose E. Garcia (IFIC-Valencia) on behalf of ATLAS Collaboration XXXIXth Rencontres de Moriond.

1 Search for Excited Leptons with the CMS Detector at the Large Hadron Collider. Andy Yen, Yong Yang, Marat Gataullin, Vladimir Litvine California Institute.

Discovery Potential for MSSM Higgs Bosons with ATLAS Johannes Haller (CERN) on behalf of the ATLAS collaboration International Europhysics Conference on.

1 Viktor Veszprémi (Purdue University, CDF Collaboration) SUSY 2005, Durham Search for the SM Higgs Boson at the CDF Experiment Search for the SM Higgs.

8.882 LHC Physics Experimental Methods and Measurements Higgs Physics and Other Essentials [Lecture 22, April 29, 2009]

Fabiola Gianotti, Physics at LHC, Pisa, April 2002 PART 2.

05/11/2006Prof. dr hab. Elżbieta Richter-Wąs Physics Program of the experiments at L arge H adron C ollider Lecture 5.

Top Quark Physics: An Overview Young Scientists’ Workshop, Ringberg castle, July 21 st 2006 Andrea Bangert.

Kaluza-Klein gluon production at the LHC

August 22, 2002UCI Quarknet The Higgs Particle Sarah D. Johnson University of La Verne August 22, 2002.

J. Nielsen1 What is the Higgs Boson? Jason Nielsen SCIPP / UC Santa Cruz VERTEX 2004 June 25, 2007 And how do we search for it?

1 Beate Heinemann, UC Berkeley and LBNL Università di Pisa, February 2010 Particle Physics from Tevatron to LHC: what we know and what we hope to discover.

1 Physics at Hadron Colliders Lecture III Beate Heinemann University of California, Berkeley and Lawrence Berkeley National Laboratory CERN, Summer Student.

Precise Measurements of SM Higgs at the ILC Simulation and Analysis V.Saveliev, Obninsk State University, Russia /DESY, Hamburg ECFA Study Workshop, Valencia.

Higgs Properties Measurement based on HZZ*4l with ATLAS

Study of Higgs boson production in bosonic decay channels at the LHC (including off-shell production) Susumu Oda Kyushu University On behalf of the ATLAS.

17 April. 2005,APS meeting, Tampa,FloridaS. Bhattacharya 1 Satyaki Bhattacharya Beyond Standard Model Higgs Search at LHC.

Potential for measuring the vertex at colliders E.A., Kanemura Phys. Lett. B626, 111(2005) E.A., Kanemura, Kanzaki hep-ph/ Eri Asakawa (KEK) 1.Introduction.

KIRTI RANJANDIS, Madison, Wisconsin, April 28, Top Quark Production Cross- Section at the Tevatron Collider On behalf of DØ & CDF Collaboration KIRTI.

C. K. MackayEPS 2003 Electroweak Physics and the Top Quark Mass at the LHC Kate Mackay University of Bristol On behalf of the Atlas & CMS Collaborations.

Implications (Perspectives) from Tevatron Higgs Ben Kilminster (Fermilab) Workshop on Implications of LHC results for TeV-scale physics August 29, 2011.

Electroweak physics at the LHC with ATLAS APS April 2003 Meeting – Philadelphia, PA Arthur M. Moraes University of Sheffield, UK (on behalf of the ATLAS.

Electroweak Symmetry Breaking without Higgs Bosons in ATLAS Ryuichi Takashima Kyoto University of Education For the ATLAS Collaboration.

Search for the Higgs boson in H  ZZ (*) decay modes on ATLAS German D Carrillo Montoya, Lashkar Kashif University of Wisconsin-Madison On behalf of the.

M. Biglietti (INFN Roma3) on behalf of ATLAS CDF CMS and D0 collaborations Frontiers in Particle Physics: From Dark Matter to the LHC and Beyond

Top Quark Physics At TeVatron and LHC. Overview A Lightning Review of the Standard Model Introducing the Top Quark tt* Pair Production Single Top Production.

The Higgs Boson Beate Heinemann, University of Liverpool  The Standard Model and Beyond  Tevatron and LHC  Tevatron Results on Higgs Searches  Future.

Searches for a light Higgs boson in association with a photon and two forward jets Emidio Gabrielli Helsinki Institute of Physics work made in coll. with.

Flavour independent neutral Higgs boson searches at LEP Ivo van Vulpen NIKHEF On behalf of the LEP collaborations EPS conference 2005.

Charged Higgs boson at the LHC 이강영 ( 건국대학교 연세대학교

SM Higgs decay to dimuons Ashok Kumar, Suman Beri Panjab University – Chandigarh INDIA-CMS meet March 3-5, 2005 Chandigarh.

Searching for the Higgs boson in the VH and VBF channels at ATLAS and CMS Dr. Adrian Buzatu Research Associate.

12 March 2006, LCWS06, BangaloreS. Bhattacharya 1 Satyaki Bhattacharya The Standard Model Higgs Search at the LHC University of Delhi.

On the Brink of Revelation and Revolution: Electroweak Symmetry Breaking in 2008 Rick St. Denis – Glasgow University.

K. Jakobs, Universität Freiburg CERN Summer Student Lectures, Aug Physics at Hadron Colliders Lecture 3 Search for the Higgs boson Higgs boson production.

K. Jakobs, Universität Freiburg CERN Summer Student Lectures, Aug Physics at Hadron Colliders Lecture 3 Search for the Higgs boson Higgs boson production.

Electroweak Summary Chris Hays, Oxford University for the EWK/BSM session conveners: Michael Kramer Dave South Filip Zarnecki XVI th Workshop on Deep Inelastic.

Higgs Physics in ATLAS Bruce Mellado University of Wisconsin US ATLAS Software Meeting BNL, August

Marc M. Baarmand – Florida Tech 1 TOP QUARK STUDIES FROM CMS AT LHC Marc M. Baarmand Florida Institute of Technology PHYSICS AT LHC Prague, Czech Republic,

Particle Physics II Chris Parkes Top Quark Discovery Decay Higgs Searches Indirect mW and mt Direct LEP & LHC searches 2 nd Handout.

Standard Hadron Colliders III. Triple Bosons & Top Quark P.Mättig Bergische Universität Wuppertal Peter Mättig, CERN Summer Students 2014.

Vanina Ruhlmann-Kleider DAPNIA/SPP (Saclay) V.Ruhlmann-KleiderPhysics at LHC, Praha Review of Higgs boson searches at LEP Introduction The SM Higgs.

La Thuile, March, 15 th, 2003 f Makoto Tomoto ( FNAL ) Prospects for Higgs Searches at DØ Makoto Tomoto Fermi National Accelerator Laboratory (For the.

Backup slides Z 0 Z 0 production Once  s > 2M Z ~ GeV ÞPair production of Z 0 Z 0 via t-channel electron exchange. e+e+ e-e- e Z0Z0 Z0Z0 Other.

LEP Search for Single Top production and new fermions Mario Antonelli LNF-INFN Frascati ICHEP 2002 Amsterdam on behalf of the 4- LEP experiments.

Jim Olsen Princeton University Colloquium of the School of Physics and Astronomy Queen Mary University of London January 17, 2014 Nature of the New Boson:

LHC Prospects on Standard Model Higgs Riccardo Ranieri INFN and Università degli Studi di Firenze on behalf of ATLAS and CMS Collaborations ICHEP’04 32.

Search for Standard Model Higgs in ZH  l + l  bb channel at DØ Shaohua Fu Fermilab For the DØ Collaboration DPF 2006, Oct. 29 – Nov. 3 Honolulu, Hawaii.

Suyong Choi (SKKU) SUSY Standard Model Higgs Searches at DØ Suyong Choi SKKU, Korea for DØ Collaboration.

Electroweak Physics Lecture 6

Venkat Kaushik, Jae Yu University of Texas at Arlington

g g s High Mass Higgs at the Tevatron

Lecture 13 Higgs Hunting --- The experimental Perspective

Hunting the Last Missing Particle of the Standard Model

Status of LHC/ATLAS/CMS and Physics explored at LHC

Xinyu Miao Department of Physics Univ. of Arizona 03/30/07

Experimental Particle PhysicsPHYS6011 Performing an analysis Lecture 5

Beate Heinemann, UC Berkeley and LBNL

Presentation transcript:

1 Higgs Mechanism Cyril Topfel

2 What to expect from this Presentation (Table of Contents) Some very limited theory explanation Higgs at LEP Higgs at the Tevatron Higgs at the LHC Conclusions

3 The Higgs-Mechanism... is responsible for the mass of massive particles... causes the electroweak symmetry breaking... is the last piece of the Standard Model that hasn‘t been shown experimentally The Higgs particle will be found at the LHC, if it exists.

4 Some Theory Higgs-Potential Symmetric, but non-symmetric in the ground state. v = 246 GeV Non-zero vacuum expectation value: G F = e -5 GEV -2 No constrain for In the Higgs mass

5 Some Theory Masses of the gauge bosons through symmetry breaking: Due to gauge invariance Fermions get their masses through Yukawa coupling with the Higgs field. The coupling strengths are free parameters. (But g top ~1, why?

6 Higgs Production at e+e- Colliders

7 Higgs Production at Hadron Colliders gg Fusion W/Z Fusion H-radiation 10x > > (~= at low mass)

8 Higgs Decay Modes H massDom. proc <130 GeVH->bb (ff) >130 GeVH->V*V #  (H) ~10MeV <GeV #: V*V: one real and one virtual Vector Boson: W*W or Z*Z >180 GeVH->VV tt-channel not very relevant m(H)>500 ->  ~ m ~10MeV H->  : rare decays, but clean signature

9 Higgs at LEP LEP1 sensitive to: e + e - -> (H 0 -> bb) (Z 0 -> ) e + e - -> (H 0 -> bb) (Z 0 -> l + l - ) ( l : e or  ) LEP2 additionally involved decay modes e + e - -> (H 0 -> bb) (Z 0 ->qq) e + e - -> (H 0 ->  ) (Z 0 ->qq) e + e - -> (H 0 -> qq) (Z 0 ->  ) ET miss ! leptonic ! BR* m(H) = 115 GeV 17% 6% 60% 10% Background!

10 LEP -> GeV! Q = L (s+b) /L (b) BG (simulated) S (simulated) 1-sigma (BG) 2-sigma (BG) BUT: Combined data only 1.7 sigma 95% CL of Higgs mass lower bound of 114 GeV

11 Tevatron

12 Constrains on Higgs mass m(H)>114 GeV (LEP II) m(H)<166 GeV (LEP II) Results from precision electroweak measurements: M(H) = 85 (+39) (-28) GeV

13 LHC Cross-sections 10 to 100 x larger at the LHC (depending on Higgs mass)

14 LHC M(H)<120 GeV Signal x-secion*BR 0.36pb BG x-secion (ttbb) 60pb Dominant decay channel: H-bb (but only usable in associated production mode) Good b-tagging needed t-tagging to reduce bck M(H)<140 GeV 2 forward jets Higgs decay products in central region -> fb -1 -> ~ 40 fb -1 needed for discovery

15 LHC M(H)<150 GeV X-section * BR 50 fb, But very clean signature EM Calorimetry efficiency Crucial (ATLAS vs CMS performance) M(H)>130 GeV X-section * BR 5.7 fb, very clean signature High mass:

16 LHC: Discovery potential

17 Thank You