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

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

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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[superscript −1] at 7 TeV and 5.3 fb[superscript −1] a...

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Hlavní autoři: Apyan, Aram, Bendavid, Joshua L., Busza, Wit, Butz, Erik M., Cali, Ivan Amos, Chan, M., Gomez-Ceballos, Guillelmo, Goncharov, Maxim, Hahn, Kristian Allan, Kim, Y., Klute, Markus, Krajczar, Krisztian F., Ma, Teng, Nahn, Steven, Paus, Christoph M. E., Ralph, Duncan Kelley, Rudolph, Matthew Scott, Stephans, George S. F., Sung, Kevin Kai Hong, Velicanu, Dragos Alexandru, Wenger, Edward Allen, Wyslouch, Boleslaw, Yilmaz, Yetkin, Yoon, A. S., Zanetti, Marco, Wolf, Roger, Yang, Mingming, Bauer, Gerry P, Dutta, Valentina, Levin, Andrew Michael, Luckey Jr, P David, Roland, Christof E, Roland, Gunther M, Stoeckli, Fabian, Sumorok, Konstanty C
Další autoři: Massachusetts Institute of Technology. Department of Physics
Médium: Článek
Jazyk:en_US
Vydáno: Elsevier 2014
On-line přístup:http://hdl.handle.net/1721.1/91933
https://orcid.org/0000-0002-3831-9071
https://orcid.org/0000-0003-3106-4894
https://orcid.org/0000-0001-6332-5839
https://orcid.org/0000-0001-8983-2169
https://orcid.org/0000-0002-1260-777X
https://orcid.org/0000-0002-9418-6656
https://orcid.org/0000-0002-6047-4211
https://orcid.org/0000-0003-3681-0649
https://orcid.org/0000-0002-0869-5631
https://orcid.org/0000-0002-1136-6900
Popis
Shrnutí: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[superscript −1] at 7 TeV and 5.3 fb[superscript −1] at 8 TeV. The search is performed in five decay modes: γγ, ZZ, W[superscript +]W[superscript −], τ[superscript +]τ[superscript −], and b[bar over b]. 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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