Search for Higgs boson off-shell production in proton-proton collisions at 7 and 8 TeV and derivation of constraints on its total decay width

被引：0
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作者：
V. Khachatryan
A. M. Sirunyan
A. Tumasyan
W. Adam
E. Asilar
T. Bergauer
J. Brandstetter
E. Brondolin
M. Dragicevic
J. Erö
M. Flechl
M. Friedl
R. Frühwirth
V. M. Ghete
C. Hartl
N. Hörmann
J. Hrubec
M. Jeitler
A. König
M. Krammer
I. Krätschmer
D. Liko
T. Matsushita
I. Mikulec
D. Rabady
N. Rad
B. Rahbaran
H. Rohringer
J. Schieck
R. Schöfbeck
J. Strauss
W. Treberer-Treberspurg
W. Waltenberger
C.-E. Wulz
V. Mossolov
N. Shumeiko
J. Suarez Gonzalez
S. Alderweireldt
T. Cornelis
E. A. De Wolf
X. Janssen
A. Knutsson
J. Lauwers
S. Luyckx
M. Van De Klundert
H. Van Haevermaet
P. Van Mechelen
N. Van Remortel
A. Van Spilbeeck
S. Abu Zeid
机构：
[1] Yerevan Physics Institute,State Key Laboratory of Nuclear Physics and Technology
[2] Institut für Hochenergiephysik der OeAW,Department of Physics
[3] National Centre for Particle and High Energy Physics,National Centre for Particle Physics
[4] Universiteit Antwerpen,National Centre for Physics
[5] Vrije Universiteit Brussel,Institute of Experimental Physics, Faculty of Physics
[6] Université Libre de Bruxelles,Skobeltsyn Institute of Nuclear Physics
[7] Ghent University,Institute for Particle Physics
[8] Université Catholique de Louvain,Faculty of Physics
[9] Université de Mons,School of Physics and Astronomy
[10] Centro Brasileiro de Pesquisas Fisicas,Facoltà Ingegneria
[11] Universidade do Estado do Rio de Janeiro,undefined
[12] Universidade Estadual Paulista,undefined
[13] Universidade Federal do ABC,undefined
[14] Institute for Nuclear Research and Nuclear Energy,undefined
[15] University of Sofia,undefined
[16] Beihang University,undefined
[17] Institute of High Energy Physics,undefined
[18] Peking University,undefined
[19] Universidad de Los Andes,undefined
[20] University of Split,undefined
[21] Faculty of Electrical Engineering,undefined
[22] Mechanical Engineering and Naval Architecture,undefined
[23] University of Split,undefined
[24] Faculty of Science,undefined
[25] Institute Rudjer Boskovic,undefined
[26] University of Cyprus,undefined
[27] Charles University,undefined
[28] Universidad San Francisco de Quito,undefined
[29] Academy of Scientific Research and Technology of the Arab Republic of Egypt,undefined
[30] Egyptian Network of High Energy Physics,undefined
[31] National Institute of Chemical Physics and Biophysics,undefined
[32] University of Helsinki,undefined
[33] Helsinki Institute of Physics,undefined
[34] Lappeenranta University of Technology,undefined
[35] DSM/IRFU,undefined
[36] CEA/Saclay,undefined
[37] Laboratoire Leprince-Ringuet,undefined
[38] Ecole Polytechnique,undefined
[39] IN2P3-CNRS,undefined
[40] Institut Pluridisciplinaire Hubert Curien,undefined
[41] Université de Strasbourg,undefined
[42] Université de Haute Alsace Mulhouse,undefined
[43] CNRS/IN2P3,undefined
[44] Centre de Calcul de l’Institut National de Physique Nucleaire et de Physique des Particules,undefined
[45] CNRS/IN2P3,undefined
[46] Université de Lyon,undefined
[47] Université Claude Bernard Lyon 1,undefined
[48] CNRS-IN2P3,undefined
[49] Institut de Physique Nucléaire de Lyon,undefined
[50] Georgian Technical University,undefined
来源：
Journal of High Energy Physics | / 2016卷
关键词：
Hadron-Hadron scattering (experiments); Higgs physics;
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摘要：
A search is presented for the Higgs boson off-shell production in gluon fusion and vector boson fusion processes with the Higgs boson decaying into a W+W− pair and the W bosons decaying leptonically. The data observed in this analysis are used to constrain the Higgs boson total decay width. The analysis is based on the data collected by the CMS experiment at the LHC, corresponding to integrated luminosities of 4.9 fb−1 at a centre-of-mass energy of 7 TeV and 19.4 fb−1 at 8 TeV, respectively. An observed (expected) upper limit on the off-shell Higgs boson event yield normalised to the standard model prediction of 2.4 (6.2) is obtained at the 95% CL for the gluon fusion process and of 19.3 (34.4) for the vector boson fusion process. Observed and expected limits on the total width of 26 and 66 MeV are found, respectively, at the 95% confidence level (CL). These limits are combined with the previous result in the ZZ channel leading to observed and expected 95% CL upper limits on the width of 13 and 26 MeV, respectively. [graphic not available: see fulltext]
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