Measurement of the mass of the top quark in decays with a J/ψ meson in pp collisions 8 Tev

被引:6
作者
Khachatryan, V. [1 ]
Sirunyan, A. M. [1 ]
Tumasyan, A. [1 ]
Adam, W. [2 ]
Asilar, E. [2 ]
Bergauer, T. [2 ]
Brandstetter, J. [2 ]
Brondolin, E. [2 ]
Dragicevic, M. [2 ]
Eroe, J. [2 ]
Flechl, M. [2 ]
Friedl, M. [2 ]
Fruehwirth, R. [2 ,196 ]
Ghete, V. M. [2 ]
Hartl, C. [2 ]
Hoermann, N. [2 ]
Hrubec, J. [2 ]
Jeitler, M. [2 ,196 ]
Koenig, A. [2 ]
Kraetschmer, I. [2 ]
Liko, D. [2 ]
Matsushita, T. [2 ]
Mikulec, I. [2 ]
Rabady, D. [2 ]
Rad, N. [2 ]
Rahbaran, B. [2 ]
Rohringer, H. [2 ]
Schieck, J. [2 ,196 ]
Strauss, J. [2 ]
Treberer-Treberspurg, W. [2 ]
Waltenberger, W. [2 ]
Wulz, C. -E. [2 ,196 ]
Mossolov, V. [3 ]
Shumeiko, N. [3 ]
Gonzalez, J. Suarez [3 ]
Alderweireldt, S. [4 ]
De Wolf, E. A. [4 ]
Janssen, X. [4 ]
Lauwers, J. [4 ]
Van De Klundert, M. [4 ]
Van Haevermaet, H. [4 ]
Van Mechelen, P. [4 ]
Van Remortel, N. [4 ]
Van Spilbeeck, A. [4 ]
Abu Zeid, S. [5 ]
Blekman, F. [5 ]
D'Hondt, J. [5 ]
Daci, N. [5 ]
De Bruyn, I. [5 ]
Deroover, K. [5 ]
机构
[1] Yerevan Phys Inst, Yerevan, Armenia
[2] OeAW, Inst Hochenergiephys, Vienna, Austria
[3] Natl Ctr Particle & High Energy Phys, Minsk, BELARUS
[4] Univ Antwerp, Antwerp, Belgium
[5] Vrije Univ Brussel, Brussels, Belgium
[6] Univ Libre Bruxelles, Brussels, Belgium
[7] Univ Ghent, Ghent, Belgium
[8] Catholic Univ Louvain, Louvain, Belgium
[9] Univ Mons, Mons, Belgium
[10] Ctr Brasileiro Pesquisas Fis, Rio De Janeiro, Brazil
[11] Univ Estado Rio de Janeiro, Rio De Janeiro, Brazil
[12] Univ Estadual Paulista, Sao Paulo, Brazil
[13] Univ Fed ABC, Sao Paulo, Brazil
[14] Inst Nucl Energy Res, Sofia, Bulgaria
[15] Univ Sofia, Sofia, Bulgaria
[16] Beihang Univ, Beijing, Peoples R China
[17] Inst High Energy Phys, Beijing, Peoples R China
[18] Peking Univ, State Key Lab Nucl Phys & Technol, Beijing, Peoples R China
[19] Univ Los Andes, Bogota, Colombia
[20] Univ Split, Fac Elect Engn Mech Engn & Naval Architecture, Split, Croatia
[21] Univ Split, Fac Sci, Split, Croatia
[22] Inst Rudjer Boskov, Zagreb, Croatia
[23] Univ Cyprus, Nicosia, Cyprus
[24] Charles Univ Prague, Prague, Czech Republic
[25] Univ San Francisco Quito, Quito, Ecuador
[26] Acad Sci Res & Technol, Egyptian Network High Energy Phys, Cairo, Egypt
[27] NICPB, Tallinn, Estonia
[28] Univ Helsinki, Dept Phys, Helsinki, Finland
[29] Helsinki Inst Phys, Helsinki, Finland
[30] Lappeenranta Univ Technol, Lappeenranta, Finland
[31] Univ Paris Saclay, CEA, IRFU, Gif Sur Yvette, France
[32] CNRS, IN2P3, Ecole Polytech, Lab Leprince Ringuet, Paris, France
[33] Univ Strasbourg, Univ Haute Alsace Mulhouse, CNRS IN2P3, Inst Pluridisciplinaire Hubert Curien, Strasbourg, France
[34] CNRS, IN2P3, Inst Natl Phys Nucl & Phys Particules, Ctr Calcul, Villeurbanne, France
[35] Univ Claude Bernard Lyon 1, CNRS, IN2P3, Inst Phys Nucl Lyon, Villeurbanne, France
[36] Georgian Tech Univ, Tbilisi, Georgia
[37] Tbilisi State Univ, Tbilisi, Georgia
[38] Rhein Westfal TH Aachen, Phys Inst 1, Aachen, Germany
[39] Rhein Westfal TH Aachen, Phys Inst A 3, Aachen, Germany
[40] Rhein Westfal TH Aachen, Phys Inst B 3, Aachen, Germany
[41] Deutsch Elekt Synchrotron, Hamburg, Germany
[42] Univ Hamburg, Hamburg, Germany
[43] Inst Expt Kernphys, Karlsruhe, Germany
[44] NCSR Demokritos, INPP, Aghia Paraskevi, Greece
[45] Natl & Kapodistrian Univ Athens, Athens, Greece
[46] Univ Ioannina, Ioannina, Greece
[47] Eotvos Lorand Univ, MTA ELTE Lendulet CMS Particle & Nucl Phys Grp, Budapest, Hungary
[48] Wigner Res Ctr Phys, Budapest, Hungary
[49] Inst Nucl Res ATOMKI, Debrecen, Hungary
[50] Univ Debrecen, Debrecen, Hungary
来源
JOURNAL OF HIGH ENERGY PHYSICS | 2016年 / 12期
基金
芬兰科学院; 美国国家科学基金会; 奥地利科学基金会; 欧洲研究理事会; 巴西圣保罗研究基金会;
关键词
Hadron-Hadron scattering (experiments); Top physics; LHC;
D O I
10.1007/JHEP12(2016)123
中图分类号
O412 [相对论、场论]; O572.2 [粒子物理学];
学科分类号
摘要
A first measurement of the top quark mass in the decay channel t -> (W -> l nu)(b -> J/psi + X -> mu(+) + mu(-) + X) is presented. The analysis uses events selected from the proton-proton collisions recorded by the CMS detector at the LHC at a center-of-mass energy of 8TeV. The data correspond to an integrated luminosity of 19.7 fb(-1), with 666 t (t) over bar and single top quark candidate events containing a reconstructed J/psi candidate decaying into an oppositely-charged muon pair. The mass of the (J/psi + l) system, where l is an electron or a muon from W boson decay, is used to extract a top quark mass of 173.5 +/- 3.0 (stat) +/- 0.9 (syst) GeV.
引用
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页数:39
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