Search for excited quarks in ep collisions at HERA

被引：9

作者：

Aaron, F. D. ^{[7
,45
]}

Alexa, C. ^{[7
]}

Alimujiang, K. ^{[1
]}

Andreev, V. ^{[26
]}

Antunovic, B. ^{[1
]}

Asmone, A. ^{[35
,36
]}

Backovic, S. ^{[32
]}

Baghdasaryan, A. ^{[41
]}

Barrelet, E. ^{[30
,31
]}

Bartel, W. ^{[1
]}

Begzsuren, K. ^{[38
]}

Belousov, A. ^{[26
]}

Bizot, J. C. ^{[28
]}

Boudry, V. ^{[29
]}

Bozovic-Jelisavcic, I. ^{[3
]}

Bracinik, J. ^{[4
]}

Brandt, G. ^{[1
]}

Brinkmann, M. ^{[1
]}

Brisson, V. ^{[28
]}

Bruncko, D. ^{[17
]}

Bunyatyan, A. ^{[14
,41
]}

Buschhorn, G. ^{[27
]}

Bystritskaya, L. ^{[25
]}

Campbell, A. J. ^{[1
]}

Avila, K. B. Cantun ^{[23
]}

Cassol-Brunner, F. ^{[22
]}

Cerny, K. ^{[34
]}

Cerny, V. ^{[17
,46
]}

Chekelian, V. ^{[27
]}

Cholewa, A. ^{[1
]}

Contreras, J. G. ^{[23
]}

Coughlan, J. A. ^{[8
]}

Cozzika, G. ^{[12
]}

Cvach, J. ^{[33
]}

Dainton, J. B. ^{[19
]}

Daum, K. ^{[40
,47
]}

Deak, M. ^{[1
]}

de Boer, Y. ^{[1
]}

Delcourt, B. ^{[28
]}

Del Degan, M. ^{[43
]}

Delvax, J. ^{[5
,6
]}

De Roeck, A. ^{[1
,48
]}

De Wolf, E. A. ^{[5
,6
]}

Diaconu, C. ^{[22
]}

Dodonov, V. ^{[14
]}

Dossanov, A. ^{[27
]}

Dubak, A. ^{[32
]}

Eckerlin, G. ^{[1
]}

Efremenko, V. ^{[25
]}

Egli, S. ^{[39
]}

机构：

[1] DESY, D-2000 Hamburg, Germany

[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, B-2020 Antwerp, Belgium

[6] ULB VUB, Interuniv Inst High Energies, Brussels, Belgium

[7] NIPNE, Bucharest, Romania

[8] Rutherford Appleton Lab, Didcot OX11 0QX, Oxon, England

[9] Inst Nucl Phys, Krakow, Poland

[10] TU Dortmund, Inst Phys, Dortmund, Germany

[11] Joint Inst Nucl Res, Dubna, Russia

[12] CE Saclay, DSM Irfu, CEA, Gif Sur Yvette, France

[13] Univ Hamburg, Inst Expt Phys, Hamburg, Germany

[14] Max Planck Inst Kernphys, D-69117 Heidelberg, Germany

[15] Heidelberg Univ, Inst Phys, D-6900 Heidelberg, Germany

[16] Heidelberg Univ, Kirchhoff Inst Phys, D-6900 Heidelberg, Germany

[17] Slovak Acad Sci, Inst Expt Phys, Kosice 04353, Slovakia

[18] Univ Lancaster, Dept Phys, Lancaster, England

[19] Univ Liverpool, Dept Phys, Liverpool L69 3BX, Merseyside, England

[20] Queen Mary Univ London, London E1 4NS, England

[21] Lund Univ, Dept Phys, Lund, Sweden

[22] Univ Mediterranee, CNRS, CPPM, IN2P3, Marseille, France

[23] CINVESTAV, Dept Fis Aplicada, Merida, Yucatan, Mexico

[24] CINVESTAV, Dept Fis, Merida, Yucatan, Mexico

[25] Inst Theoret & Expt Phys, Moscow 117259, Russia

[26] PN Lebedev Phys Inst, Moscow 117924, Russia

[27] Max Planck Inst Phys & Astrophys, D-80805 Munich, Germany

[28] Univ Paris 11, CNRS, LAL, IN2P3, Orsay, France

[29] CNRS, Ecole Polytech, IN2P3, LLR, Palaiseau, France

[30] Univ Paris 06, CNRS, LPNHE, IN2P3, Paris, France

[31] Univ Paris 07, CNRS, LPNHE, IN2P3, Paris, France

[32] Univ Montenegro, Fac Sci, Podgorica, Montenegro

[33] Acad Sci Czech Republ, Inst Phys, Prague, Czech Republic

[34] Charles Univ Prague, Fac Math & Phys, Prague, Czech Republic

[35] Univ Roma Tre, Dipartimento Fis, Rome, Italy

[36] INFN Roma 3, Rome, Italy

[37] Bulgarian Acad Sci, Inst Nucl Res & Nucl Energy, Sofia, Bulgaria

[38] Mongolian Acad Sci, Inst Phys & Technol, Ulaanbaatar, Mongolia

[39] Paul Scherrer Inst, Villigen, Switzerland

[40] Univ Wuppertal, Fachbereich C, Wuppertal, Germany

[41] Yerevan Phys Inst, Yerevan 375036, Armenia

[42] DESY, Zeuthen, Germany

[43] ETH, Inst Teilchenphys, Zurich, Switzerland

[44] Univ Zurich, Inst Phys, Zurich, Switzerland

[45] Univ Bucharest, Fac Phys, Bucharest, Romania

[46] Comenius Univ, Bratislava, Slovakia

[47] Univ Wuppertal, Rechenzentrum, Wuppertal, Germany

[48] CERN, CH-1211 Geneva 23, Switzerland

[49] Safarik Univ, Kosice, Slovakia

[50] Natl Tech Univ Athens, Dept Phys, GR-15773 Athens, Greece

来源：

PHYSICS LETTERS B | 2009年 / 678卷 / 04期

基金：

英国科学技术设施理事会;

关键词：

LIQUID ARGON CALORIMETER; CURRENT CROSS-SECTIONS; LEPTON PRODUCTION; ELECTRONS; FERMIONS; CALIBRATION; SCATTERING; GENERATOR; MOMENTUM; LIMITS;

D O I：

10.1016/j.physletb.2009.06.044

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

A search for excited quarks is performed using the full e(+/-)p data sample collected by the HI experiment at HERA, corresponding to a total integrated luminosity of 475 pb(-1). The electroweak decays of excited quarks q* -> q gamma. q* -> qZ and q* - qW with Subsequent hadronic or leptonic decays of the W and Z bosons are considered. No evidence for first generation excited quark production is found. Mass dependent exclusion limits on q* 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 quark searches. (C) 2009 Elsevier B.V. All rights reserved.

引用

页码：335 / 343

页数：9

共 54 条

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