Search for stable hadronising squarks and gluinos with the ATLAS experiment at the LHC

被引:68
作者
Aad, G. [70 ]
Abbott, B. [149 ]
Abdallah, J. [17 ,18 ,19 ]
Abdelalim, A. A. [71 ]
Abdesselam, A. [157 ]
Abdinov, O. [16 ]
Abi, B. [150 ]
Abolins, M. [123 ]
Abramowicz, H.
Abreu, H. [153 ,154 ]
Acerbi, E.
Acharya, B. S.
Adams, D. L. [38 ]
Addy, T. N. [83 ]
Adelman, J. [234 ]
Aderholz, M. [135 ]
Adomeit, S. [134 ]
Adragna, P. [107 ]
Adye, T. [171 ]
Aefsky, S. [35 ]
Aguilar-Saavedra, J. A. [165 ,166 ]
Aharrouche, M. [115 ]
Ahlen, S. P. [34 ]
Ahles, F. [70 ]
Ahmad, A. [200 ]
Ahsan, M. [61 ]
Aielli, G. [176 ,177 ]
Akdogan, T. [1 ]
Akesson, T. P. [113 ]
Akimoto, G. [206 ,207 ]
Akimov, A. V. [130 ]
Alam, M. S. [2 ]
Alam, M. A. [108 ]
Albrand, S. [80 ,81 ,82 ]
Aleksa, M. [44 ]
Aleksandrov, I. N. [94 ]
Aleppo, M. [124 ,125 ]
Alessandria, F. [124 ]
Alexa, C. [39 ]
Alexander, G.
Alexandre, G. [71 ]
Alexopoulos, T. [15 ]
Alhroob, M. [33 ]
Aliev, M. [25 ]
Alimonti, G. [124 ]
Alison, J. [160 ]
Aliyev, M. [16 ]
Allport, P. P. [104 ]
Allwood-Spiers, S. E. [78 ]
Almond, J. [116 ]
机构
[1] Bogazici Univ, Dept Phys, Istanbul, Turkey
[2] SUNY Albany, Albany, NY 12222 USA
[3] Univ Alberta, Dept Phys, Edmonton, AB, Canada
[4] Ankara Univ, Dept Phys, TR-06100 Ankara, Turkey
[5] Dumlupinar Univ, Dept Phys, Kutahya, Turkey
[6] Gazi Univ, Dept Phys, Ankara, Turkey
[7] TOBB Univ Econ & Technol, Div Phys, Ankara, Turkey
[8] Turkish Atom Energy Commiss, Ankara, Turkey
[9] CNRS, IN2P3, LAPP, Annecy Le Vieux, France
[10] Univ Savoie, Annecy Le Vieux, France
[11] Argonne Natl Lab, Div High Energy Phys, Argonne, IL USA
[12] Univ Arizona, Dept Phys, Tucson, AZ 85721 USA
[13] Univ Texas Arlington, Dept Phys, Arlington, TX 76019 USA
[14] Univ Athens, Dept Phys, Athens, Greece
[15] Natl Tech Univ Athens, Dept Phys, Zografos, Greece
[16] Azerbaijan Acad Sci, Inst Phys, Baku 370143, Azerbaijan
[17] Inst Fis Altes Energies, Barcelona, Spain
[18] Univ Autonoma Barcelona, E-08193 Barcelona, Spain
[19] ICREA, Barcelona, Spain
[20] Univ Belgrade, Inst Phys, Belgrade, Serbia
[21] Vinca Inst Nucl Sci, Belgrade, Serbia
[22] Univ Bergen, Dept Phys & Technol, Bergen, Norway
[23] Lawrence Berkeley Natl Lab, Div Phys, Berkeley, CA USA
[24] Univ Calif Berkeley, Berkeley, CA 94720 USA
[25] Humboldt Univ, Dept Phys, Berlin, Germany
[26] Univ Bern, Albert Einstein Ctr Fundamental Phys, Bern, Switzerland
[27] Univ Bern, High Energy Phys Lab, Bern, Switzerland
[28] Univ Birmingham, Sch Phys & Astron, Birmingham, W Midlands, England
[29] Dogus Univ, Div Phys, Istanbul, Turkey
[30] Gaziantep Univ, Dept Engn Phys, Gaziantep, Turkey
[31] INFN Sez Bologna, Bologna, Italy
[32] Univ Bologna, Dipartmento Fis, Bologna, Italy
[33] Univ Bonn, Inst Phys, D-5300 Bonn, Germany
[34] Boston Univ, Dept Phys, Boston, MA 02215 USA
[35] Brandeis Univ, Dept Phys, Waltham, MA 02254 USA
[36] Univ Fed Rio De Janeiro COPPE EE IF, Rio De Janeiro, 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] Univ Politehn Bucuresti, Bucharest, Romania
[41] Univ Buenos Aires, Dept Fis, Buenos Aires, DF, Argentina
[42] Univ Cambridge, Cavendish Lab, Cambridge CB3 0HE, England
[43] Carleton Univ, Dept Phys, Ottawa, ON K1S 5B6, Canada
[44] CERN, Geneva, Switzerland
[45] Univ Chicago, Enrico Fermi Inst, Chicago, IL 60637 USA
[46] Pontificia Univ Catolica Chile, Dept Fis, Santiago, Chile
[47] Univ Tecn Federico Santa Maria, Dept Fis, Valparaiso, Chile
[48] Chinese Acad Sci, Inst High Energy Phys, Beijing, Peoples R China
[49] Univ Sci & Technol China, Dept Modern Phys, Hefei, Anhui, Peoples R China
[50] Nanjing Univ, Dept Phys, Jiangsu, Peoples R China
基金
加拿大自然科学与工程研究理事会; 巴西圣保罗研究基金会; 美国国家科学基金会;
关键词
Supersymmetry; Long-lived particle; R-hadron; Limit; E(+)E(-) COLLISIONS; PARTICLES;
D O I
10.1016/j.physletb.2011.05.010
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
Hitherto unobserved long-lived massive particles with electric and/or colour charge are predicted by a range of theories which extend the Standard Model. In this Letter a search is performed at the ATLAS experiment for slow-moving charged particles produced in proton-proton collisions at 7 TeV centre-of-mass energy at the LHC, using a data-set corresponding to an integrated luminosity of 34 pb(-1). No deviations from Standard Model expectations are found. This result is interpreted in a framework of supersymmetry models in which coloured sparticles can hadronise into long-lived bound hadronic states, termed R-hadrons, and 95% CL limits are set on the production cross-sections of squarks and gluinos. The influence of R-hadron interactions in matter was studied using a number of different models, and lower mass limits for stable sbottoms and stops are found to be 294 and 309 GeV respectively. The lower mass limit for a stable gluino lies in the range from 562 to 586 GeV depending on the model assumed. Each of these constraints is the most stringent to date. (C) 2011 CERN. Published by Elsevier B.V. All rights reserved.
引用
收藏
页码:1 / 19
页数:19
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