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

Adler, V.; Wickens, J.; Wang, J.; Vanlaer, P.; Vander Velde, C.; Thomas, L.; Rugovac, S.; Reis, T.; Mohammadi, A.; Marage, P. E.; Léonard, A.; Hreus, T.; Gay, A. P.R.; Dewulf, J. P.; Dero, V.; De Lentdecker, G.; Clerbaux, B.; Villella, I.; Van Onsem, G. P.; Van Mulders, P.; Van Lancker, L.; Van Doninck, W.; Tavernier, S.; Olbrechts, A.; Maes, M.; Kalogeropoulos, A.; Goorens, R.; Gonzalez Suarez, R.; Devroede, O.; Blyweert, S.; Blekman, F.; Van Spilbeeck, A.; Van Remortel, N.; Van Mechelen, P.; Van Haevermaet, H.; Staykova, Z.; Selvaggi, M.; Rougny, R.; Roland, B.; Ochesanu, S.; Mucibello, L.; Luyckx, S.; Janssen, X.; Druzhkin, D.; De Wolf, E. A.; Cornelis, T.; Beaumont, W.; Bansal, S.; Bansal, M.; Zuyeuski, R.; Missevitch, O.; Korzhik, M.; Fedorov, A.; Suarez Gonzalez, J.; Stefanovitch, R.; Solin, A.; Shumeiko, N.; Mossolov, V.; Makarenko, V.; Litomin, A.; Emeliantchik, I.; Chekhovsky, V.; Wulz, C. E.; Widl, E.; Walzel, G.; Waltenberger, W.; Taurok, A.; Szoncsó, F.; Strauss, J.; Schöfb...

Abstract

Results are presented from searches for the standard model Higgs boson in proton-proton collisions at s=7 and 8 TeV in the Compact Muon Solenoid experiment at the LHC, using data samples corresponding to integrated luminosities of up to 5.1 fb-1 at 7 TeV and 5.3 fb-1 at 8 TeV. The search is performed in five decay modes: γγ, ZZ, W+W-, τ+τ-, and bb-. An excess of events is observed above the expected background, with 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, γγ 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. © 2012 CERN.

• Journal Article Type: Article
• Publication Date: Sep 17, 2012
• Deposit Date: Oct 1, 2012
• Publicly Available Date: Feb 9, 2016
• Journal: Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
• Print ISSN: 0370-2693
• Publisher: Elsevier
• Peer Reviewed: Peer Reviewed
• Volume: 716
• Issue: 1
• Pages: 30-61
• DOI: https://doi.org/10.1016/j.physletb.2012.08.021
• Keywords: CMS, physics, Higgs, Higgs boson
• Public URL: https://uwe-repository.worktribe.com/output/943807
• Publisher URL: http://dx.doi.org/10.1016/j.physletb.2012.08.021
• Additional Information: Corporate Creators : CMS Collaboration
• Contract Date: Feb 9, 2016