Search for excited electrons in ep collisions at HERA

被引:25
作者
Aaron, F. D. [6 ,43 ]
Alexa, C. [6 ]
Andreev, V. [24 ]
Antunovic, B.
Aplin, S. [12 ]
Asmone, A. [33 ,34 ]
Astvatsatourov, A. [5 ]
Bacchetta, A. [12 ]
Backovic, S. [30 ]
Baghdasaryan, A. [39 ]
Baranov, P. [24 ]
Barrelet, E. [28 ,29 ]
Bartel, W. [12 ]
Beckingham, M. [12 ]
Begzsuren, K. [36 ]
Behnke, O. [15 ]
Belousov, A. [24 ]
Berger, N. [41 ]
Bizot, J. C. [26 ]
Boenig, M. -O. [9 ]
Boudry, V. [27 ]
Bozovic-Jelisavcic, I. [3 ]
Bracinik, J. [4 ]
Brandt, G. [12 ]
Brinkmann, M. [12 ]
Brisson, V. [26 ]
Bruncko, D. [16 ]
Bunyatyan, A. [14 ,39 ]
Buschhorn, G. [25 ]
Bystritskaya, L. [23 ]
Campbell, A. J. [12 ]
Avila, K. B. Cantun [21 ]
Cassol-Brunner, F. [1 ]
Cerny, K. [16 ,44 ]
Cerny, V. [32 ]
Chekelian, V. [25 ]
Cholewa, A. [12 ]
Contreras, J. G. [21 ]
Coughlan, J. A. [7 ]
Cozzika, G. [11 ]
Cvach, J. [31 ]
Dainton, J. B. [18 ]
Daum, K. [38 ,45 ]
Deak, M. [12 ]
de Boer, Y. [12 ]
Delcourt, B. [26 ]
Del Degan, M. [41 ]
Delvax, J. [5 ]
De Roeck, A. [12 ,46 ]
De Wolf, E. A. [5 ]
机构
[1] Univ Mediterranee, CNRS, IN2P3, CPPM, Marseille, France
[2] Rhein Westfal TH Aachen, Inst Phys 1, D-5100 Aachen, Germany
[3] Vinca Inst Nucl Sci, Belgrade, Serbia
[4] Univ Birmingham, Sch Phys & Astron, Birmingham, W Midlands, England
[5] Univ Antwerp, Interuniv Inst High Energies ULB VUB, Antwerp, Belgium
[6] NIPNE, Bucharest, Romania
[7] Rutherford Appleton Lab, Didcot OX11 0QX, Oxon, England
[8] Inst Nucl Phys, Krakow, Poland
[9] TU Dortmund, Inst Phys, Dortmund, Germany
[10] Joint Inst Nucl Res, Dubna, Russia
[11] CE Saclay, DSM DAPNIA, CEA, Gif Sur Yvette, France
[12] DESY, D-2000 Hamburg, Germany
[13] Univ Hamburg, Inst Expt Phys, Hamburg, Germany
[14] Max Planck Inst Kernphys, Heidelberg, Germany
[15] Heidelberg Univ, Inst Phys, D-6900 Heidelberg, Germany
[16] Slovak Acad Sci, Inst Expt Phys, Kosice 04353, Slovakia
[17] Univ Lancaster, Dept Phys, Lancaster, England
[18] Univ Liverpool, Dept Phys, Liverpool L69 3BX, Merseyside, England
[19] Queen Mary Univ London, London E1 4NS, England
[20] Lund Univ, Dept Phys, Lund, Sweden
[21] CINVESTAV, Dept Fis Aplicada, Merida, Yucatan, Mexico
[22] CINVESTAV, Dept Fis, Mexico City 14000, DF, Mexico
[23] Inst Theoret & Expt Phys, Moscow 117259, Russia
[24] PN Lebedev Phys Inst, Moscow 117924, Russia
[25] Max Planck Inst Phys & Astrophys, D-80805 Munich, Germany
[26] Univ Paris 11, CNRS, IN2P3, LAL, F-91405 Orsay, France
[27] Ecole Polytech, CNRS, IN2P3, LLR, F-91128 Palaiseau, France
[28] Univ Paris 06, CNRS, IN2P3, LPNHE, Paris, France
[29] Univ Paris 07, CNRS, IN2P3, LPNHE, Paris, France
[30] Univ Montenegro, Fac Sci, Podgorica, Montenegro
[31] Acad Sci Czech Republ, Inst Phys, Prague, Czech Republic
[32] Charles Univ Prague, Fac Math & Phys, Prague, Czech Republic
[33] Univ Roma Tre, Dipartimento Fis, Rome, Italy
[34] INFN Roma 3, Rome, Italy
[35] Bulgarian Acad Sci, Inst Nucl Res & Nucl Energy, Sofia, Bulgaria
[36] Mongolian Acad Sci, Inst Phys & Technol, Ulaanbaatar, Mongolia
[37] Paul Scherrer Inst, Villigen, Switzerland
[38] Univ Wuppertal, Fachbereich C, Wuppertal, Germany
[39] Yerevan Phys Inst, Yerevan 375036, Armenia
[40] DESY, Zeuthen, Germany
[41] ETH, Inst Teilchenphys, Zurich, Switzerland
[42] Univ Zurich, Inst Phys, Zurich, Switzerland
[43] Univ Bucharest, Fac Phys, Bucharest, Romania
[44] Comenius Univ, Bratislava, Slovakia
[45] Univ Wuppertal, Rechenzentrum, Wuppertal, Germany
[46] CERN, Geneva, Switzerland
[47] Safarik Univ, Kosice, Slovakia
[48] Natl Tech Univ Athens, Dept Phys, GR-15773 Zografos, Greece
[49] Ulaanbaatar Univ, Ulaanbaatar, Mongolia
[50] Heidelberg Univ, Kirchhoff Inst Phys, Heidelberg, Germany
基金
英国科学技术设施理事会;
关键词
D O I
10.1016/j.physletb.2008.07.014
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
A search for excited electrons is performed using the full e(+/-) p data sample collected by the HI experiment at HERA, corresponding to a total luminosity of 475 pb(-1). The electroweak decays of excited electrons e* -> e gamma, e* -> eZ and e* -> vW with subsequent hadronic or leptonic decays of the W and Z bosons are considered. No evidence for excited electron production is found. Mass dependent exclusion limits on e* production cross sections and on the ratio f/Lambda of the coupling to the compositeness scale are derived within gauge mediated models. These limits extend the excluded region compared to previous excited electron searches. The e* production via contact interactions is also addressed for the first time in ep collisions. (C) 2008 Elsevier B.V. All rights reserved.
引用
收藏
页码:131 / 139
页数:9
相关论文
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