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

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题名:	Observation of a new boson at a mass of 125 GeV with the CMS experiment at the LHC
作者:	林宗泰;Blau, Bertrand;Apresyan, Artur;Bagliesi, Giuseppe;Lopez Perez, Juan Antonio;Velkovska, Julia;Gebauer, Iris;Varelas, Nikos;Timlin, Claire;Innocente, Vincenzo;Sawley, Marie-Christine;Hadjiiska, Roumyana;Gascon, Susan;Geiser, Achim;Spalding, William J;Markina, Anastasia;Chang, Yuan-Hann;Shukla, Prashant;Greco, Michela;Colaleo, Anna;Piotrzkowski, Krzysztof;Steinbrück, Georg;Avetisyan, Aram;Elliott-Peisert, Anna;Farrell, Chris;Chatterji, Sudeep;Pant, Lalit Mohan;Tricomi, Alessia;Martinez, German;D'Angelo, Pasqualino;Cockerill, David JA;Kuznetsov, Valentin;Von Goeler, Eberhard;Nappi, Aniello;Noy, Matthew;Ferencek, Dinko;Haas, Jeff;Chung, Man-Ho;Ekmedzic, Marko;Riley, Daniel;Lu, Ying;Hollingsworth, Matthew;Brooke, James John;Thomsen, Jan;Behner, Frank;Mott, Alexander;Ryu, Seangchan;Mohanty, Ajit Kumar;Spiropulu, Maria;De Moraes Gregores, Eduardo;Malcles, Julie;Jain, Shilpi;Luyckx, Sten;Danielson, Thomas;Fabbri, Fabrizio;Massa, Maurizio;Berry, Edmund;Chwalek, Thorsten;Dupont-Sagorin, Niels;Paktinat Mehdiabadi, Saeid;Szillasi, Zoltan;Bauer, Gerry;Hatakeyama, Kenichi;Kazana, Malgorzata;Dumanoglu, Isa;Frueboes, Tomasz;Segoni, Ilaria;Odeh, Mohammed;Bachtis, Michail;Costa, Salvatore;Letts, James;Kim, Tae Jeong;Saka, Halil;Skatchkov, Nikolai;Piparo, Danilo;Van Mechelen, Pierre;Vanini, Sara;Gulmini, Michele;Fulcher, Jonathan;West, Christopher;Zaytsev, Valentin;Gomez, Gervasio;Gninenko, Sergei;Dinardo, Mauro Emanuele;Manna, Norman;Ptochos, Fotios;Timciuc, Vladlen;Wilken, Rachel;Ford, William T;Grachov, Oleg;Dini, Paolo;Kovalskyi, Dmytro;Damgov, Jordan;Boimska, Bozena;Theel, Andreas;Chao, Yuan;Camanzi, Barbara;Beri, Suman Bala;Solin, Alexander;Cankocak, Kerem;Van Remortel, Nick
贡献者:	理學院物理學系
关键词:	Bosons;CMS;Decay;Elementary particles;Exact sciences and technology;Experiment;Higgs;Higgs bosons;High Energy Physics - Experiment;Nuclear physics;Particle Physics;Physics;Searching;Solenoids;Standard deviation;The physics of elementary particles and fields
日期:	2012-09-17
上传时间:	2026-04-23 12:33:04 (UTC+8)
出版者:	Elsevier;Kidlington: Elsevier B.V
摘要:	摘要： 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 $b\bar{b}$. 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 $\pm$ 0.4 (stat.) $\pm$ 0.5 (syst.) GeV. The decay to two photons indicates that the new particle is a boson with spin different from one. 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. Results are presented from searches for the standard model Higgs boson in proton-proton collisions at sqrt(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 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, 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, 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. 出版者： Kidlington: Elsevier B.V 出版日期： 2012-09-17 出處： Phys. Lett, 2012-09, Vol.716 (1), p.30-61 資源來源： Elsevier ScienceDirect Journals Complete 版權： 2012 CERN 版權： 2015 INIST-CNRS 版權： CC0 1.0 - Universal 識別號： ISSN: 0370-2693 識別號： ISSN: 1873-2445 識別號： EISSN: 1873-2445 識別號： DOI: 10.1016/j.physletb.2012.08.021 識別號： CODEN: PYLBAJ
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