Evidence for the 125 GeV Higgs boson decaying to a pair of τ leptons

被引：0
|
作者：
S. Chatrchyan
V. Khachatryan
A.M. Sirunyan
A. Tumasyan
W. Adam
T. Bergauer
M. Dragicevic
J. Erö
C. Fabjan
M. Friedl
R. Frühwirth
V.M. Ghete
C. Hartl
N. Hörmann
J. Hrubec
M. Jeitler
W. Kiesenhofer
V. Knünz
M. Krammer
I. Krätschmer
D. Liko
I. Mikulec
D. Rabady
B. Rahbaran
H. Rohringer
R. Schöfbeck
J. Strauss
A. Taurok
W. Treberer-Treberspurg
W. Waltenberger
C.-E. Wulz
V. Mossolov
N. Shumeiko
J. Suarez Gonzalez
S. Alderweireldt
M. Bansal
S. Bansal
T. Cornelis
E.A. De Wolf
X. Janssen
A. Knutsson
S. Luyckx
S. Ochesanu
B. Roland
R. Rougny
H. Van Haevermaet
P. Van Mechelen
N. Van Remortel
A. Van Spilbeeck
F. Blekman
机构：
[1] Yerevan Physics Institute,State Key Laboratory of Nuclear Physics and Technology
[2] Institut für Hochenergiephysik der OeAW,Academy of Scientific Research and Technology of the Arab Republic of Egypt
[3] National Centre for Particle and High Energy Physics,Department of Physics
[4] Universiteit Antwerpen,Institute of High Energy Physics and Informatization
[5] Vrije Universiteit Brussel,National Centre for Particle Physics
[6] Université Libre de Bruxelles,National Centre for Physics
[7] Ghent University,Institute of Experimental Physics, Faculty of Physics
[8] Université Catholique de Louvain,Skobeltsyn Institute of Nuclear Physics
[9] Université de Mons,State Research Center of Russian Federation
[10] Centro Brasileiro de Pesquisas Fisicas,Instituto de Física de Cantabria (IFCA)
[11] Universidade do Estado do Rio de Janeiro,Institute for Particle Physics
[12] Universidade Estadual Paulista,Plasma Physics Research Center, Science and Research Branch
[13] Universidade Federal do ABC,Faculty of Physics
[14] Institute for Nuclear Research and Nuclear Energy,School of Physics and Astronomy
[15] University of Sofia,undefined
[16] Institute of High Energy Physics,undefined
[17] Peking University,undefined
[18] Universidad de Los Andes,undefined
[19] Technical University of Split,undefined
[20] University of Split,undefined
[21] Institute Rudjer Boskovic,undefined
[22] University of Cyprus,undefined
[23] Charles University,undefined
[24] Egyptian Network of High Energy Physics,undefined
[25] National Institute of Chemical Physics and Biophysics,undefined
[26] University of Helsinki,undefined
[27] Helsinki Institute of Physics,undefined
[28] Lappeenranta University of Technology,undefined
[29] DSM/IRFU,undefined
[30] CEA/Saclay,undefined
[31] Laboratoire Leprince-Ringuet,undefined
[32] Ecole Polytechnique,undefined
[33] IN2P3-CNRS,undefined
[34] Institut Pluridisciplinaire Hubert Curien,undefined
[35] Université de Strasbourg,undefined
[36] Université de Haute Alsace Mulhouse,undefined
[37] CNRS/IN2P3,undefined
[38] Centre de Calcul de l’Institut National de Physique Nucleaire et de Physique des Particules,undefined
[39] CNRS/IN2P3,undefined
[40] Université de Lyon,undefined
[41] Université Claude Bernard Lyon 1,undefined
[42] CNRS-IN2P3,undefined
[43] Institut de Physique Nucléaire de Lyon,undefined
[44] Tbilisi State University,undefined
[45] RWTH Aachen University,undefined
[46] I. Physikalisches Institut,undefined
[47] RWTH Aachen University,undefined
[48] III. Physikalisches Institut A,undefined
[49] RWTH Aachen University,undefined
[50] III. Physikalisches Institut B,undefined
来源：
Journal of High Energy Physics | / 2014卷
关键词：
Hadron-Hadron Scattering; Higgs physics;
D O I：
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学科分类号：
摘要：
A search for a standard model Higgs boson decaying into a pair of τ leptons is performed using events recorded by the CMS experiment at the LHC in 2011 and 2012. The dataset corresponds to an integrated luminosity of 4.9 fb−1 at a centre-of-mass energy of 7 TeV and 19.7 fb−1 at 8 TeV. Each τ lepton decays hadronically or leptonically to an electron or a muon, leading to six different final states for the τ -lepton pair, all considered in this analysis. An excess of events is observed over the expected background contributions, with a local significance larger than 3 standard deviations for mH values between 115 and 130 GeV. The best fit of the observed H → τ τ signal cross section times branching fraction for mH = 125 GeV is 0.78 ± 0.27 times the standard model expectation. These observations constitute evidence for the 125 GeV Higgs boson decaying to a pair of τ leptons. [graphic not available: see fulltext]
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