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

来源：

PHYSICS LETTERS B | 2008年 / 666卷 / 02期

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

页码：131 / 139

页数：9

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