Search for Higgs Boson Decay to a Charm Quark-Antiquark Pair in Proton-Proton Collisions at √s=13 TeV

被引:22
|
作者
Tumasyan, A. [1 ]
Adam, W. [2 ]
Andrejkovic, J. W. [2 ]
Bergauer, T. [2 ]
Chatterjee, S. [2 ]
Damanakis, K. [2 ]
Dragicevic, M. [2 ]
Del Valle, A. Escalante [2 ]
Hussain, P. S. [2 ]
Jeitler, M. [2 ,202 ]
Krammer, N. [2 ]
Lechner, L. [2 ]
Liko, D. [2 ]
Mikulec, I. [2 ]
Paulitsch, P. [2 ]
Pitters, F. M. [2 ]
Schieck, J. [2 ,202 ]
Schoefbeck, R. [2 ]
Schwarz, D. [2 ]
Templ, S. [2 ]
Waltenberger, W. [2 ]
Wulz, C. -E. [2 ,202 ]
Darwish, M. R. [3 ,203 ]
Janssen, T. [3 ]
Kello, T. [3 ,5 ]
Sfar, H. Rejeb [3 ]
Van Mechelen, P. [3 ]
Bols, E. S. [4 ]
D'Hondt, J. [4 ]
De Moor, A. [4 ]
Delcourt, M. [4 ]
El Faham, H. [4 ]
Lowette, S. [4 ]
Moortgat, S. [4 ]
Morton, A. [4 ]
Mueller, D. [4 ]
Sahasransu, A. R. [4 ]
Tavernier, S. [4 ]
Van Doninck, W. [4 ]
Vannerom, D. [4 ]
Clerbaux, B. [5 ]
De Lentdecker, G. [5 ]
Favart, L. [5 ]
Hohov, D. [5 ]
Jaramillo, J. [5 ]
Lee, K. [5 ,106 ]
Mahdavikhorrami, M. [5 ]
Makarenko, I. [5 ]
Malara, A. [5 ]
Paredes, S. [5 ]
机构
[1] Yerevan Phys Inst, Yerevan, Armenia
[2] Inst Hochenergiephys, Vienna, Austria
[3] Univ Antwerp, Antwerp, Belgium
[4] Vrije Univ Brussel, Brussels, Belgium
[5] Univ Libre Bruxelles, Brussels, Belgium
[6] Univ Ghent, Ghent, Belgium
[7] Catholic Univ Louvain, Louvain La Neuve, Belgium
[8] Ctr Brasileiro Pesquisas Fis, Rio De Janeiro, Brazil
[9] Univ Estado Rio de Janeiro, Rio De Janeiro, Brazil
[10] Univ Fed ABC, Univ Estadual Paulista, Sao Paulo, Brazil
[11] Bulgarian Acad Sci, Inst Nucl Res & Nucl Energy, Sofia, Bulgaria
[12] Univ Sofia, Sofia, Bulgaria
[13] Univ Tarapaca, Inst Alta Invest, Casilla 7 D, Arica, Chile
[14] Beihang Univ, Beijing, Peoples R China
[15] Tsinghua Univ, Dept Phys, Beijing, Peoples R China
[16] Inst High Energy Phys, Beijing, Peoples R China
[17] Peking Univ, State Key Lab Nucl Phys & Technol, Beijing, Peoples R China
[18] Sun Yat Sen Univ, Guangzhou, Peoples R China
[19] Fudan Univ, Inst Modern Phys, Shanghai, Peoples R China
[20] Fudan Univ, Key Lab Nucl Phys & Ion Beam Applicat MOE, Shanghai, Peoples R China
[21] Zhejiang Univ, Hangzhou, Zhejiang, Peoples R China
[22] Univ Los Andes, Bogota, Colombia
[23] Univ Antioquia, Medellin, Colombia
[24] Univ Split, Fac Elect Engn Mech Engn & Naval Architecture, Split, Croatia
[25] Univ Split, Fac Sci, Split, Croatia
[26] Inst Rudjer Boskovic, Zagreb, Croatia
[27] Univ Cyprus, Nicosia, Cyprus
[28] Charles Univ Prague, Prague, Czech Republic
[29] Escuela Politec Nacl, Quito, Ecuador
[30] Univ San Francisco Quito, Quito, Ecuador
[31] Acad Sci Res & Technol Arab Republ Egypt, Egyptian Network High Energy Phys, Cairo, Egypt
[32] Fayoum Univ, Ctr High Energy Phys CHEP FU, Al Fayyum, Egypt
[33] NICPB, Tallinn, Estonia
[34] Univ Helsinki, Dept Phys, Helsinki, Finland
[35] Helsinki Inst Phys, Helsinki, Finland
[36] Lappeenranta Lahti Univ Technol, Lappeenranta, Finland
[37] Univ Paris Saclay, CEA, IRFU, Gif Sur Yvette, France
[38] Inst Polytech Paris, Ecole Polytech, CNRS, Lab Leprince Ringuet,IN2P3, Palaiseau, France
[39] Univ Strasbourg, CNRS, IPHC, UMR 7178, Strasbourg, France
[40] Inst Phys 2 Infinis Lyon IP2I, Villeurbanne, France
[41] Georgian Tech Univ, Tbilisi, Georgia
[42] Rhein Westfal TH Aachen, Phys Inst 1, Aachen, Germany
[43] Rhein Westfal TH Aachen, Phys Inst A 3, Aachen, Germany
[44] Rhein Westfal TH Aachen, Phys Inst B 3, Aachen, Germany
[45] DESY, Hamburg, Germany
[46] Univ Hamburg, Hamburg, Germany
[47] Karlsruher Inst Technol, Karlsruhe, Germany
[48] NCSR Demokritos, Inst Nucl & Particle Phys INPP, Aghia Paraskevi, Greece
[49] Natl & Kapodistrian Univ Athens, Athens, Greece
[50] Natl Tech Univ Athens, Athens, Greece
基金
巴西圣保罗研究基金会; 芬兰科学院;
关键词
HADRON; STRAHLUNG; PROGRAM;
D O I
10.1103/PhysRevLett.131.061801
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
A search for the standard model Higgs boson decaying to a charm quark-antiquark pair, H ? cc-, produced in association with a leptonically decaying V (W or Z) boson is presented. The search is performed with proton-proton collisions at vs = 13 TeV collected by the CMS experiment, corresponding to an integrated luminosity of 138 fb-1. Novel charm jet identification and analysis methods using machine learning techniques are employed. The analysis is validated by searching for Z ? cc- in VZ events, leading to its first observation at a hadron collider with a significance of 5.7 standard deviations. The observed (expected) upper limit on s(VH)B(H ? cc-) is 0.94 (0.50(-0.15)(+0.22) )pb at 95% confidence level (C.L.), corresponding to 14 (7.6(-2.3)(+3.4)) times the standard model prediction. For the Higgs-charm Yukawa coupling modifier, ?c, the observed (expected) 95% C.L. interval is 1.1 < |?(c)| < 5.5 (|?(c)| < 3.4), the most stringent constraint to date.
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页数:21
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