Observation of a new boson at a mass of 125 GeV with the CMS experiment at the LHC

Serguei Chatrchyan; Timothy A Barrass; Francis J D Bostock; Jim J Brooke; Emyr J Clement; David G Cussans; Henning U Flaecher; Robert J E Frazier; Joel Goldstein; Mark A Grimes; Greg P Heath; Helen F Heath; Luke Kreczko; W Lacesso; Simon Metson; David M Newbold; Kachanon Nirunpong; A Poll; Sergey Senkin; Vincent J Smith; Tom S Williams; The CMS Collaboration

doi:10.1016/j.physletb.2012.08.021

Observation of a new boson at a mass of 125 GeV with the CMS experiment at the LHC

Serguei Chatrchyan, Timothy A Barrass, Francis J D Bostock, Jim J Brooke, Emyr J Clement, David G Cussans, Henning U Flaecher, Robert J E Frazier, Joel Goldstein, Mark A Grimes, Greg P Heath, Helen F Heath, Luke Kreczko, W Lacesso, Simon Metson, David M Newbold, Kachanon Nirunpong, A Poll, Sergey Senkin, Vincent J SmithTom S Williams, The CMS Collaboration

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Abstract

Results are presented from searches for the standard model Higgs boson in proton-proton collisions at sqrt(s)=7 and 8 TeV in the CMS experiment at the LHC, using data samples corresponding to integrated luminosities of up to 5.1 inverse femtobarns at 7 TeV and 5.3 inverse femtobarns at 8 TeV. The search is performed in five decay modes: gamma gamma, ZZ, WW, tau tau, and b b-bar. An excess of events is observed above the expected background, a local significance of 5.0 standard deviations, at a mass near 125 GeV, signalling the production of a new particle. The expected significance for a standard model Higgs boson of that mass is 5.8 standard deviations. The excess is most significant in the two decay modes with the best mass resolution, gamma gamma and ZZ; a fit to these signals gives a mass of 125.3 +/- 0.4 (stat.) +/- 0.5 (syst.) GeV. The decay to two photons indicates that the new particle is a boson with spin different from one.

Original language	English
Pages (from-to)	30-61
Journal	Physics Letters B
Volume	716
Issue number	1
Early online date	18 Aug 2012
DOIs	https://doi.org/10.1016/j.physletb.2012.08.021
Publication status	Published - 17 Sept 2012

Keywords

higgs
CMS
physics

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Consolidated Grant 2012-16
Newbold, D. M. & Rademacker, J. H.
1/10/12 → 1/10/16
Project: Research
Particle physics equipment grant.
Newbold, D. M.
1/10/12 → 1/04/13
Project: Research
Wakeham Rebate for Rolling Grant 2010-11
Newbold, D. M.
20/02/12 → 20/03/12
Project: Research

1 Membership of external research organisation
1 - Research and Teaching at External Organisation

CMS project at CERN LHC
Helen F Heath (Contributor)
1995 → …
Activity: Other activity types › - Research and Teaching at External Organisation
European Organization for Nuclear Research (External organisation)
Joel Goldstein (Participant)
1993 → …
Activity: Membership types › Membership of external research organisation

Cite this

Chatrchyan, S., Barrass, T. A., Bostock, F. J. D., Brooke, J. J., Clement, E. J., Cussans, D. G., Flaecher, H. U., Frazier, R. J. E., Goldstein, J., Grimes, M. A., Heath, G. P., Heath, H. F., Kreczko, L., Lacesso, W., Metson, S., Newbold, D. M., Nirunpong, K., Poll, A., Senkin, S., ... CMS Collaboration, T. (2012). Observation of a new boson at a mass of 125 GeV with the CMS experiment at the LHC. Physics Letters B, 716(1), 30-61. https://doi.org/10.1016/j.physletb.2012.08.021

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title = "Observation of a new boson at a mass of 125 GeV with the CMS experiment at the LHC",

abstract = "Results are presented from searches for the standard model Higgs boson in proton-proton collisions at sqrt(s)=7 and 8 TeV in the CMS experiment at the LHC, using data samples corresponding to integrated luminosities of up to 5.1 inverse femtobarns at 7 TeV and 5.3 inverse femtobarns at 8 TeV. The search is performed in five decay modes: gamma gamma, ZZ, WW, tau tau, and b b-bar. An excess of events is observed above the expected background, a local significance of 5.0 standard deviations, at a mass near 125 GeV, signalling the production of a new particle. The expected significance for a standard model Higgs boson of that mass is 5.8 standard deviations. The excess is most significant in the two decay modes with the best mass resolution, gamma gamma and ZZ; a fit to these signals gives a mass of 125.3 +/- 0.4 (stat.) +/- 0.5 (syst.) GeV. The decay to two photons indicates that the new particle is a boson with spin different from one.",

keywords = "higgs, CMS, physics",

author = "Serguei Chatrchyan and Barrass, {Timothy A} and Bostock, {Francis J D} and Brooke, {Jim J} and Clement, {Emyr J} and Cussans, {David G} and Flaecher, {Henning U} and Frazier, {Robert J E} and Joel Goldstein and Grimes, {Mark A} and Heath, {Greg P} and Heath, {Helen F} and Luke Kreczko and W Lacesso and Simon Metson and Newbold, {David M} and Kachanon Nirunpong and A Poll and Sergey Senkin and Smith, {Vincent J} and Williams, {Tom S} and {CMS Collaboration}, The",

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month = sep,

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doi = "10.1016/j.physletb.2012.08.021",

language = "English",

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Chatrchyan, S, Barrass, TA, Bostock, FJD, Brooke, JJ , Clement, EJ , Cussans, DG , Flaecher, HU, Frazier, RJE, Goldstein, J , Grimes, MA, Heath, GP, Heath, HF , Kreczko, L, Lacesso, W, Metson, S, Newbold, DM, Nirunpong, K, Poll, A, Senkin, S, Smith, VJ, Williams, TS & CMS Collaboration, T 2012, 'Observation of a new boson at a mass of 125 GeV with the CMS experiment at the LHC', Physics Letters B, vol. 716, no. 1, pp. 30-61. https://doi.org/10.1016/j.physletb.2012.08.021

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T1 - Observation of a new boson at a mass of 125 GeV with the CMS experiment at the LHC

AU - Chatrchyan, Serguei

AU - Barrass, Timothy A

AU - Bostock, Francis J D

AU - Brooke, Jim J

AU - Clement, Emyr J

AU - Cussans, David G

AU - Flaecher, Henning U

AU - Frazier, Robert J E

AU - Goldstein, Joel

AU - Grimes, Mark A

AU - Heath, Greg P

AU - Heath, Helen F

AU - Kreczko, Luke

AU - Lacesso, W

AU - Metson, Simon

AU - Newbold, David M

AU - Nirunpong, Kachanon

AU - Poll, A

AU - Senkin, Sergey

AU - Smith, Vincent J

AU - Williams, Tom S

AU - CMS Collaboration, The

PY - 2012/9/17

Y1 - 2012/9/17

N2 - Results are presented from searches for the standard model Higgs boson in proton-proton collisions at sqrt(s)=7 and 8 TeV in the CMS experiment at the LHC, using data samples corresponding to integrated luminosities of up to 5.1 inverse femtobarns at 7 TeV and 5.3 inverse femtobarns at 8 TeV. The search is performed in five decay modes: gamma gamma, ZZ, WW, tau tau, and b b-bar. An excess of events is observed above the expected background, a local significance of 5.0 standard deviations, at a mass near 125 GeV, signalling the production of a new particle. The expected significance for a standard model Higgs boson of that mass is 5.8 standard deviations. The excess is most significant in the two decay modes with the best mass resolution, gamma gamma and ZZ; a fit to these signals gives a mass of 125.3 +/- 0.4 (stat.) +/- 0.5 (syst.) GeV. The decay to two photons indicates that the new particle is a boson with spin different from one.

AB - Results are presented from searches for the standard model Higgs boson in proton-proton collisions at sqrt(s)=7 and 8 TeV in the CMS experiment at the LHC, using data samples corresponding to integrated luminosities of up to 5.1 inverse femtobarns at 7 TeV and 5.3 inverse femtobarns at 8 TeV. The search is performed in five decay modes: gamma gamma, ZZ, WW, tau tau, and b b-bar. An excess of events is observed above the expected background, a local significance of 5.0 standard deviations, at a mass near 125 GeV, signalling the production of a new particle. The expected significance for a standard model Higgs boson of that mass is 5.8 standard deviations. The excess is most significant in the two decay modes with the best mass resolution, gamma gamma and ZZ; a fit to these signals gives a mass of 125.3 +/- 0.4 (stat.) +/- 0.5 (syst.) GeV. The decay to two photons indicates that the new particle is a boson with spin different from one.

KW - higgs

KW - CMS

KW - physics

U2 - 10.1016/j.physletb.2012.08.021

DO - 10.1016/j.physletb.2012.08.021

M3 - Article (Academic Journal)

SN - 0370-2693

VL - 716

SP - 30

EP - 61

JO - Physics Letters B

JF - Physics Letters B

IS - 1

ER -

Observation of a new boson at a mass of 125 GeV with the CMS experiment at the LHC

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Projects

Consolidated Grant 2012-16

Particle physics equipment grant.

Wakeham Rebate for Rolling Grant 2010-11

Activities

CMS project at CERN LHC

European Organization for Nuclear Research (External organisation)

Cite this