Measurement of the top-quark mass in the fully hadronic decay channel from ATLAS data at √s=7 TeV

被引:0
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作者
Aad, G. [118 ,119 ]
Abbott, B. [151 ]
Abdallah, J. [215 ]
Khalek, S. Abdel [155 ,156 ]
Abdinov, O. [15 ]
Aben, R. [144 ,145 ]
Abi, B. [152 ]
Abolins, M. [124 ]
AbouZeid, O. S. [223 ]
Abramowicz, H. [217 ]
Abreu, H. [216 ]
Abreu, R. [45 ]
Abulaiti, Y. [208 ,209 ]
Acharya, B. S. [230 ,231 ,251 ]
Adamczyka, L. [61 ]
Adams, D. L. [39 ]
Adelman, J. [248 ]
Adomeit, S. [135 ]
Adye, T. [180 ]
Agatonovic-Jovin, T. [18 ]
Aguilar-Saavedra, J. A. [167 ,172 ,173 ]
Agustoni, M. [24 ,25 ]
Ahlen, S. P. [33 ]
Ahmadov, F. [93 ,252 ]
Aielli, G. [185 ,186 ]
Akerstedt, H. [208 ,209 ]
Akesson, T. P. A. [114 ]
Akimoto, G. [219 ,220 ]
Akimov, A. V. [131 ]
Alberghi, G. L. [30 ,31 ]
Albert, J. [241 ]
Albrand, S. [82 ]
Verzini, M. J. Alconada [99 ,100 ]
Aleksa, M. [45 ]
Aleksandrov, I. N. [93 ]
Alexa, C. [40 ]
Alexander, G. [217 ]
Alexandre, G. [74 ]
Alexopoulos, T. [14 ]
Alhroob, M. [230 ,232 ]
Alimonti, G. [125 ]
Alio, L. [118 ,119 ]
Alison, J. [46 ]
Allbrooke, B. M. M. [26 ]
Allison, L. J. [101 ]
Allport, P. P. [104 ]
Almond, J. [117 ]
Aloisio, A. [140 ,141 ]
Alonso, A. [58 ]
Alonso, F. [99 ,100 ]
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, TR-06100 Ankara, Turkey
[5] Gazi Univ, Dept Phys, Ankara, Turkey
[6] TOBB Univ Econ & Technol, Div Phys, Ankara, Turkey
[7] Turkish Atom Energy Commiss, Ankara, Turkey
[8] CNRS, IN2P3, LAPP, Annecy Le Vieux, France
[9] Univ Savoie, Annecy Le Vieux, France
[10] Argonne Natl Lab, Div High Energy Phys, Argonne, IL 60439 USA
[11] Univ Arizona, Dept Phys, Tucson, AZ 85721 USA
[12] Univ Texas Arlington, Dept Phys, Arlington, TX 76019 USA
[13] Univ Athens, Dept Phys, Athens, Greece
[14] Natl Tech Univ Athens, Dept Phys, Zografos, Greece
[15] Azerbaijan Acad Sci, Inst Phys, Baku 370143, Azerbaijan
[16] Univ Autonoma Barcelona, Inst Fis Altes Energies, E-08193 Barcelona, Spain
[17] Univ Autonoma Barcelona, Dept Fis, E-08193 Barcelona, Spain
[18] Univ Belgrade, Inst Phys, Belgrade, Serbia
[19] Univ Belgrade, Vinca Inst Nucl Sci, Belgrade, Serbia
[20] Univ Bergen, Dept Phys & Technol, Bergen, Norway
[21] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Div Phys, Berkeley, CA 94720 USA
[22] Univ Calif Berkeley, Berkeley, CA 94720 USA
[23] Humboldt Univ, Dept Phys, Berlin, Germany
[24] Univ Bern, Albert Einstein Ctr Fundamental Phys, Bern, Switzerland
[25] Univ Bern, High Energy Phys Lab, Bern, Switzerland
[26] Univ Birmingham, Sch Phys & Astron, Birmingham, W Midlands, England
[27] Bogazici Univ, Dept Phys, Istanbul, Turkey
[28] Dogus Univ, Dept Phys, Istanbul, Turkey
[29] Gaziantep Univ, Dept Engn Phys, Gaziantep, Turkey
[30] Ist Nazl Fis Nucl, Sez Bologna, I-40126 Bologna, Italy
[31] Univ Bologna, Dipartimento Fis & Astron, Bologna, Italy
[32] Univ Bonn, Inst Phys, Bonn, Germany
[33] Boston Univ, Dept Phys, Boston, MA 02215 USA
[34] Brandeis Univ, Dept Phys, Waltham, MA 02254 USA
[35] Univ Fed Rio de Janeiro, COPPE EE IF, Rio De Janeiro, Brazil
[36] Univ Fed Juiz de Fora, Juiz de Fora, Brazil
[37] Fed Univ Sao Joao del Rei UFSJ, Sao Joao Del Rei, Brazil
[38] Univ Sao Paulo, Inst Fis, BR-01498 Sao Paulo, Brazil
[39] Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA
[40] Natl Inst Phys & Nucl Engn, Bucharest, Romania
[41] Natl Inst Res & Dev Isotop & Mol Technol, Dept Phys, Cluj Napoca, Romania
[42] Univ Buenos Aires, Dept Fis, Buenos Aires, DF, Argentina
[43] Univ Cambridge, Cavendish Lab, Cambridge CB3 0HE, England
[44] Carleton Univ, Dept Phys, Ottawa, ON K1S 5B6, Canada
[45] CERN, CH-1211 Geneva 23, Switzerland
[46] Univ Chicago, Enrico Fermi Inst, Chicago, IL 60637 USA
[47] Pontificia Univ Catolica Chile, Dept Fis, Santiago, Chile
[48] Univ Tecn Federico Santa Maria, Dept Fis, Valparaiso, Chile
[49] Chinese Acad Sci, Inst High Energy Phys, Beijing, Peoples R China
[50] Univ Sci & Technol China, Dept Modern Phys, Hefei, Anhui, Peoples R China
来源
EUROPEAN PHYSICAL JOURNAL C | 2015年 / 75卷 / 04期
基金
巴西圣保罗研究基金会; 美国国家科学基金会; 加拿大自然科学与工程研究理事会;
关键词
PARTON DISTRIBUTIONS;
D O I
10.1140/epjc/s10052-015-3373-1
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
The mass of the top quark is measured in a data set corresponding to 4.6 fb(-1) of proton-proton collisions with centre-of-mass energy root s = 7 TeV collected by the ATLAS detector at the LHC. Events consistent with hadronic decays of top-antitop quark pairs with at least six jets in the final state are selected. The substantial background from multijet production is modelled with data-driven methods that utilise the number of identified b-quark jets and the transverse momentum of the sixth leading jet, which have minimal correlation. The top-quark mass is obtained from template fits to the ratio of three-jet to dijet mass. The three-jet mass is calculated from the three jets produced in a top-quark decay. Using these three jets the dijet mass is obtained from the two jets produced in the W boson decay. The top-quark mass obtained from this fit is thus less sensitive to the uncertainty in the energy measurement of the jets. A binned likelihood fit yields a top-quark mass of m(t) = 175.1 +/- 1.4 (stat.) +/- 1.2 (syst.) GeV.
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页码:1 / 26
页数:26
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