Search for direct pair production of the top squark in all-hadronic final states in proton-proton collisions at=8 TeV with the ATLAS detector

被引:0
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作者
Aad, G. [118 ,119 ]
Abbott, B. [150 ]
Abdallah, J. [214 ]
Khalek, S. Abdel [154 ,155 ]
Abdinov, O. [14 ]
Aben, R. [143 ,144 ]
Abi, B. [151 ]
Abolins, M. [123 ]
AbouZeid, O. S. [222 ]
Abramowicz, H. [216 ]
Abreu, H. [194 ]
Abreu, R. [45 ]
Abulaiti, Y. [207 ,208 ]
Acharya, B. S. [229 ,230 ,250 ]
Adamczyk, L. [61 ]
Adams, D. L. [38 ]
Adelman, J. [247 ]
Adomeit, S. [134 ]
Adye, T. [179 ]
Agatonovic-Jovin, T. [18 ]
Aguilar-Saavedra, J. A. [166 ,171 ,172 ]
Agustoni, M. [23 ,24 ]
Ahlen, S. P. [32 ]
Ahmadov, F. [93 ,251 ]
Aielli, G. [184 ,185 ]
Akerstedt, H. [207 ,208 ]
Akesson, T. P. A. [114 ]
Akimoto, G. [218 ,219 ]
Akimov, A. V. [130 ]
Alberghi, G. L. [29 ,30 ]
Albert, J. [240 ]
Albrand, S. [82 ]
Alconada Verzini, M. J. [99 ,100 ]
Aleksa, M. [45 ]
Aleksandrov, I. N. [93 ]
Alexa, C. [39 ]
Alexander, G. [74 ,216 ]
Alexandre, G. [74 ]
Alexopoulos, T. [13 ]
Alhroob, M. [229 ,231 ]
Alimonti, G. [124 ]
Alio, L. [118 ,119 ]
Alison, J. [46 ]
Allbrooke, B. M. M. [25 ]
Allison, L. J. [101 ]
Allport, P. P. [104 ]
Almond, J. [117 ]
Aloisio, A. [139 ]
Alonso, A. [58 ,99 ,243 ]
Alonso, F. [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] CNRS, IN2P3, LAPP, Annecy Le Vieux, France
[8] Univ Savoie, Annecy Le Vieux, France
[9] Argonne Natl Lab, Div High Energy Phys, Argonne, IL 60439 USA
[10] Univ Arizona, Dept Phys, Tucson, AZ 85721 USA
[11] Univ Texas Arlington, Dept Phys, Arlington, TX 76019 USA
[12] Univ Athens, Dept Phys, Athens, Greece
[13] Natl Tech Univ Athens, Dept Phys, Zografos, Greece
[14] Azerbaijan Acad Sci, Inst Phys, Baku 370143, Azerbaijan
[15] Univ Autonoma Barcelona, Inst Fis Altes Energies, E-08193 Barcelona, Spain
[16] Univ Autonoma Barcelona, Dept Fis, E-08193 Barcelona, Spain
[17] Univ Belgrade, Inst Phys, Belgrade, Serbia
[18] Univ Belgrade, Vinca Inst Nucl Sci, Belgrade, Serbia
[19] Univ Bergen, Dept Phys & Technol, Bergen, Norway
[20] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Div Phys, Berkeley, CA 94720 USA
[21] Univ Calif Berkeley, Berkeley, CA 94720 USA
[22] Humboldt Univ, Dept Phys, Berlin, Germany
[23] Univ Bern, Albert Einstein Ctr Fundamental Phys, Bern, Switzerland
[24] Univ Bern, High Energy Phys Lab, Bern, Switzerland
[25] Univ Birmingham, Sch Phys & Astron, Birmingham, W Midlands, England
[26] Bogazici Univ, Dept Phys, Istanbul, Turkey
[27] Dogus Univ, Dept Phys, Istanbul, Turkey
[28] Gaziantep Univ, Dept Engn Phys, Gaziantep, Turkey
[29] Univ Bologna, INFN Sez Bologna, Bologna, Italy
[30] Univ Bologna, Dipartimento Fis & Astron, Bologna, Italy
[31] Univ Bonn, Inst Phys, Bonn, Germany
[32] Boston Univ, Dept Phys, Boston, MA 02215 USA
[33] Brandeis Univ, Dept Phys, Waltham, MA 02254 USA
[34] Univ Fed Rio de Janeiro, COPPE EE IF, Rio De Janeiro, Brazil
[35] Fed Univ Juiz de Fora UFJF, Juiz De Fora, Brazil
[36] Fed Univ Sao Joao del Rei UFSJ, Sao Joao Del Rei, Brazil
[37] Univ Sao Paulo, Inst Fis, BR-01498 Sao Paulo, Brazil
[38] Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA
[39] Natl Inst Phys & Nucl Engn, Bucharest, Romania
[40] Natl Inst Res & Dev Isotop & Mol Technol, Dept Phys, Cluj Napoca, Romania
[41] Univ Politehn Bucuresti, Bucharest, 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, Geneva, Switzerland
[46] Univ Chicago, Enrico Fermi Inst, Chicago, IL 60637 USA
[47] Catholic Univ 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
基金
加拿大自然科学与工程研究理事会; 美国国家科学基金会;
关键词
Hadron-Hadron Scattering; Supersymmetry; Top squark; Proton-proton scattering; SYMMETRY-BREAKING; MODEL; SUPERSYMMETRY; WEAK;
D O I
10.1007/JHEP09(2014)015
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 results of a search for direct pair production of the scalar partner to the top quark using an integrated luminosity of 20.1 fb(-1) of proton-proton collision data at = 8 TeV recorded with the ATLAS detector at the LHC are reported. The top squark is assumed to decay via or , where denotes the lightest neutralino (chargino) in supersymmetric models. The search targets a fully-hadronic final state in events with four or more jets and large missing transverse momentum. No significant excess over the Standard Model background prediction is observed, and exclusion limits are reported in terms of the top squark and neutralino masses and as a function of the branching fraction of . For a branching fraction of 100%, top squark masses in the range 270-645 GeV are excluded for masses below 30 GeV. For a branching fraction of 50% to either or , and assuming the mass to be twice the mass, top squark masses in the range 250-550 GeV are excluded for masses below 60 GeV.
引用
收藏
页码:1 / 51
页数:51
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