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

Authors

Serguei Chatrchyan, Vardan Khachatryan, Albert M Sirunyan, Armen Tumasyan, Wolfgang Adam, Ernest Aguilo, Thomas Bergauer, Marko Dragicevic, Janos Erö, Christian Fabjan, M Friedl, Rudolf Frühwirth, VM Ghete, J Hammer, M Hoch, N Hörmann, J Hrubec, M Jeitler, W Kiesenhofer, V Knünz, M Krammer, I Krätschmer, D Liko, W Majerotto, I Mikulec, M Pernicka, B Rahbaran, C Rohringer, H Rohringer, R Schöfbeck, J Strauss, F Szoncsó, A Taurok, W Waltenberger, G Walzel, E Widl, C-E Wulz, I Emeliantchik, V Makarenko, N Shumeiko, A Solin, R Stefanovitch, J Suarez Gonzalez, A Fedorov, M Korzhik, O Missevitch, R Zuyeuski, M Bansal, S Bansal, W Beaumont, Tom Cornelis, EA De Wolf, D Druzhkin, X Janssen, S Luyckx, L Mucibello, S Ochesanu, B Roland, R Rougny, M Selvaggi, Z Staykova, H Van Haevermaet, P Van Mechelen, A Van Spilbeeck, F Blekman, S Blyweert, J DʼHondt, O Devroede, R Gonzalez Suarez, R Goorens, A Kalogeropoulos, M Maes, A Olbrechts, S Tavernier, W Van Doninck, L Van Lancker, P Van Mulders, GP Van Onsem, I Villella, B Clerbaux, G De Lentdecker, V Dero, JP Dewulf, APR Gay, T Hreus, A Léonard, PE Marage, A Mohammadi, T Reis, S Rugovac, L Thomas, C Vander Velde, P Vanlaer, J Wang, J Wickens, Volker Adler, Kelly Beernaert, Anna Cimmino, Silvia Costantini, Guillaume Garcia, M Grunewald, Benjamin Klein, Jeremie Lellouch, Andrey Marinov, Joseph McCartin, AA Ocampo Rios, Dirk Ryckbosch, Nadja Strobbe, Filip Thyssen, Michael Tytgat, S Walsh, Efe Yazgan, Nikolaos Zaganidis, S Basegmez, G Bruno, R Castello, L Ceard, J De Favereau De Jeneret, C Delaere, P Demin, T du Pree, D Favart, L Forthomme, A Giammanco, G Grégoire, J Hollar, V Lemaitre, J Liao, O Militaru, C Nuttens, D Pagano, A Pin, K Piotrzkowski, N Schul, JM Vizan Garcia, N Beliy, T Caebergs, E Daubie, GH Hammad, GA Alves, L Brito, M Correa Martin Junior, T Martins, ME Pol, MHG Souza, WL Aldá Júnior, W Carvalho, A Custódio, EM Da Costa, D De Jesus Damiao

Publication date

2012/9/17

Journal

Physics Letters B

Volume

716

Issue

Pages

30-61

Publisher

North-Holland

Description

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.

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Cited by 22685