Search for excited electrons and muons in √s=8 TeV proton-proton collisions with the ATLAS detector

被引:18
|
作者
Aad, G. [73 ]
Abajyan, T.
Abbott, B. [153 ]
Abdallah, J. [16 ,17 ]
Khalek, S. Abdel [157 ,158 ]
Abdinov, O. [15 ]
Aben, R. [146 ,147 ]
Abi, B. [154 ]
Abolins, M. [126 ]
AbouZeid, O. S. [219 ]
Abramowicz, H. [213 ]
Abreu, H. [191 ]
Abulaiti, Y. [204 ,205 ]
Acharya, B. S. [226 ,227 ,247 ]
Adamczyk, L. [61 ]
Adams, D. L. [39 ]
Addy, T. N. [85 ]
Adelman, J. [244 ]
Adomeit, S. [137 ]
Adye, T. [176 ]
Aefsky, S. [34 ]
Agatonovic-Jovin, T. [19 ]
Aguilar-Saavedra, J. A. [169 ,170 ,171 ]
Agustoni, M. [24 ,25 ]
Ahlen, S. P. [33 ]
Ahmad, A. [207 ,208 ,237 ]
Ahmadov, F. [15 ,95 ]
Ahsan, M. [65 ]
Aielli, G. [181 ,182 ]
Akesson, T. P. [116 ]
Akimoto, G. [215 ,216 ]
Akimov, A. V. [133 ]
Alam, M. A. [110 ]
Albert, J. [237 ]
Albrand, S. [82 ,83 ,84 ]
Alconada Verzini, M. J. [101 ,102 ]
Aleksa, M. [45 ]
Aleksandrov, I. N. [95 ]
Alessandria, F. [127 ]
Alexa, C. [40 ]
Alexander, G. [213 ]
Alexandre, G. [74 ]
Alexopoulos, T. [14 ]
Alhroob, M. [226 ,228 ]
Aliev, M. [23 ]
Alimonti, G. [127 ]
Alio, L. [120 ,121 ]
Alison, J. [46 ]
Allbrooke, B. M. M. [26 ]
Allison, L. J. [103 ]
机构
[1] Univ Adelaide, Sch Chem & 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] Fed Univ Juiz de Fora UFJF, 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 Politehn Bucuresti, Bucharest, Romania
[43] Univ Buenos Aires, Dept Fis, Buenos Aires, DF, Argentina
[44] Univ Cambridge, Cavendish Lab, Cambridge CB3 0HE, England
[45] CERN, Geneva, 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
NEW JOURNAL OF PHYSICS | 2013年 / 15卷
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
LEPTON PRODUCTION; EP COLLISIONS; QUARK;
D O I
10.1088/1367-2630/15/9/093011
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
The ATLAS detector at the Large Hadron Collider is used to search for excited electrons and excited muons in the channel pp -> ll* -> ll gamma, assuming that excited leptons are produced via contact interactions. The analysis is based on 13 fb(-1) of pp collisions at a centre-of-mass energy of 8 TeV. No evidence for excited leptons is found, and a limit is set at the 95% credibility level on the cross section times branching ratio as a function of the excited-lepton mass m(l*). For m(l*) >= 0.8 TeV, the respective upper limits on sigma B(l(*) -> l gamma) are 0.75 and 0.90 fb for the e* and mu* searches. Limits on sigma B are converted into lower bounds on the compositeness scale 3. In the special case where Lambda = m(l*), excited-electron and excited-muon masses below 2.2 TeV are excluded.
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页数:32
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