Constraints on off-shell Higgs boson production and the Higgs boson total width in ZZ → 4l and ZZ → 2l2v final states with the ATLAS detector

被引:59
|
作者
Aaboudd, M. [54 ,55 ]
Aad, G. [154 ]
Abbott, B. [182 ]
Abdinov, O. [18 ]
Abeloos, B. [186 ]
Abhayasinghe, D. K. [145 ]
Abidi, S. H. [231 ]
AbouZeid, O. S. [61 ]
Abraham, N. L. [218 ]
Abramowicz, H. [224 ]
Abreu, H. [223 ]
Abulaiti, Y. [8 ]
Acharyaa, B. S. [100 ,101 ,263 ]
Adachi, S. [226 ,227 ]
Adam, L. [152 ]
Adamczyka, L. [131 ]
Adelman, J. [176 ]
Adersberger, M. [167 ]
Adiguzel, A. [16 ,282 ]
Adye, T. [204 ]
Affolder, A. A. [206 ]
Afik, Y. [223 ]
Agheorghiesei, C. [40 ]
Aguilar-Saavedra, J. A. [194 ,199 ]
Ahmadov, F. [124 ,280 ]
Aielli, G. [115 ,116 ]
Akatsuka, S. [134 ]
Akesson, T. P. A. [148 ]
Akilli, E. [78 ]
Akimov, A. V. [163 ]
Alberghi, G. L. [33 ,34 ]
Albert, J. [242 ]
Albicocco, P. [74 ,75 ]
Verzini, M. J. Alconada [138 ,139 ]
Alderweireldt, S. [173 ]
Aleksa, M. [57 ]
Aleksandrov, I. N. [124 ]
Alexa, C. [39 ]
Alexopoulos, T. [12 ]
Alhroob, M. [182 ]
Ali, B. [201 ]
Alimonti, G. [105 ]
Alison, J. [58 ]
Alkire, S. P. [209 ]
Allaire, C. [186 ]
Allbrooke, B. M. M. [218 ]
Allen, B. W. [185 ]
Allport, P. P. [31 ]
Aloisio, A. [107 ,108 ]
Alonso, A. [61 ]
机构
[1] Univ Adelaide, Dept Phys, Adelaide, SA, Australia
[2] SUNY Albany, Dept Phys, Albany, NY 12222 USA
[3] Univ Alberta, Dept Phys, Edmonton, AB, Canada
[4] Ankara Univ, Dept Phys, Ankara, Turkey
[5] Istanbul Aydin Univ, Istanbul, Turkey
[6] TOBB Univ Econ & Technol, Div Phys, Ankara, Turkey
[7] Univ Savoie Mt Blanc, LAPP, Univ Grenoble Alpes, CNRS,IN2P3, Annecy, France
[8] Argonne Natl Lab, Div High Energy Phys, Argonne, IL 60439 USA
[9] Univ Arizona, Dept Phys, Tucson, AZ 85721 USA
[10] Univ Texas Arlington, Dept Phys, POB 19059, Arlington, TX 76019 USA
[11] Natl & Kapodistrian Univ Athens, Dept Phys, Athens, Greece
[12] Natl Tech Univ Athens, Dept Phys, Zografos, Greece
[13] Univ Texas Austin, Dept Phys, Austin, TX 78712 USA
[14] Bahcesehir Univ, Fac Engn & Nat Sci, Istanbul, Turkey
[15] Istanbul Bilgi Univ, Fac Engn & Nat Sci, Istanbul, Turkey
[16] Bogazici Univ, Dept Phys, Istanbul, Turkey
[17] Gaziantep Univ, Dept Engn Phys, Gaziantep, Turkey
[18] Azerbaijan Acad Sci, Inst Phys, Baku, Azerbaijan
[19] Barcelona Inst Sci & Technol, IFAE, Barcelona, Spain
[20] Chinese Acad Sci, Inst High Energy Phys, Beijing, Peoples R China
[21] Tsinghua Univ, Dept Phys, Beijing, Peoples R China
[22] Nanjing Univ, Dept Phys, Nanjing, Jiangsu, Peoples R China
[23] UCAS, Beijing, Peoples R China
[24] Univ Belgrade, Inst Phys, Belgrade, Serbia
[25] Univ Bergen, Dept Phys & Technol, Bergen, Norway
[26] Lawrence Berkeley Natl Lab, Div Phys, Berkeley, CA USA
[27] Univ Calif Berkeley, Berkeley, CA 94720 USA
[28] Humboldt Univ, Inst Phys, Berlin, Germany
[29] Univ Bern, Albert Einstein Ctr Fundamental Phys, Bern, Switzerland
[30] Univ Bern, High Energy Phys Lab, Bern, Switzerland
[31] Univ Birmingham, Sch Phys & Astron, Birmingham, W Midlands, England
[32] Univ Antonio Narino, Ctr Invest, Bogota, Colombia
[33] Univ Bologna, Dipartimento Fis & Astron, Bologna, Italy
[34] Ist Nazl Fis Nucl, Sez Bologna, Bologna, Italy
[35] Univ Bonn, Inst Phys, Bonn, Germany
[36] Boston Univ, Dept Phys, 590 Commonwealth Ave, Boston, MA 02215 USA
[37] Brandeis Univ, Dept Phys, Waltham, MA 02254 USA
[38] Transilvania Univ Brasov, Brasov, Romania
[39] Horia Hulubei Natl Inst Phys & Nucl Engn, Bucharest, Romania
[40] Alexandru Ioan Cuza Univ, Dept Phys, Iasi, Romania
[41] Natl Inst Res & Dev Isotop & Mol Technol, Dept Phys, Cluj Napoca, Romania
[42] West Univ Timisoara, Timisoara, Romania
[43] Comenius Univ, Fac Math Phys & Informat, Bratislava, Slovakia
[44] Slovak Acad Sci, Dept Subnucl Phys, Inst Expt Phys, Kosice, Slovakia
[45] Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA
[46] Univ Buenos Aires, Dept Fis, Buenos Aires, DF, Argentina
[47] Univ Cambridge, Cavendish Lab, Cambridge, England
[48] Univ Cape Town, Dept Phys, Cape Town, South Africa
[49] Univ Johannesburg, Dept Mech Engn Sci, Johannesburg, South Africa
[50] Univ Witwatersrand, Sch Phys, Johannesburg, South Africa
基金
巴西圣保罗研究基金会; 加拿大自然科学与工程研究理事会; 美国国家科学基金会; 欧盟地平线“2020”;
关键词
PARTON DISTRIBUTIONS; SEARCH; DECAY;
D O I
10.1016/j.physletb.2018.09.048
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
A measurement of off-shell Higgs boson production in the ZZ -> 4l and ZZ -> 2l2v decay channels, where stands for either an electron or a muon, is performed using data from proton-proton collisions at a centre-of-mass energy of root s = 13 TeV. The data were collected by the ATLAS experiment in 2015 and 2016 at the Large Hadron Collider, and they correspond to an integrated luminosity of 36.1 fb(-1). An observed (expected) upper limit on the off-shell Higgs signal strength, defined as the event yield normalised to the Standard Model prediction, of 3.8 (3.4) is obtained at 95% confidence level (CL). Assuming the ratio of the Higgs boson couplings to the Standard Model predictions is independent of the momentum transfer of the Higgs production mechanism considered in the analysis, a combination with the on-shell signal-strength measurements yields an observed (expected) 95% CL upper limit on the Higgs boson total width of 14.4 (15.2) MeV. (C) 2018 The Author. Published by Elsevier B.V.
引用
收藏
页码:223 / 244
页数:22
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