Search for single top quark production at HERA

被引：36

作者：

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

Martin, M. Aldaya ^{[1
]}

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. ^{[13
]}

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. ^{[27
,32
]}

Eckerlin, G. ^{[1
]}

Efremenko, V. ^{[25
]}

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] Interuniv Inst High Energies ULB VUB, 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, CEA, DSM Irfu, 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, Mexico City 14000, DF, 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 Sud, LAL, CNRS, IN2P3, Orsay, France

[29] Ecole Polytech, CNRS, IN2P3, LLR, F-91128 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, Geneva, Switzerland

[49] Univ PJ Safarik, Kosice, Slovakia

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

来源：

PHYSICS LETTERS B | 2009年 / 678卷 / 05期

基金：

英国科学技术设施理事会;

关键词：

LIQUID ARGON CALORIMETER; EP COLLISIONS; BOSON PRODUCTION; ROOT-S; GENERATOR; PHOTOPRODUCTION; CALIBRATION; LEP;

D O I：

10.1016/j.physletb.2009.06.057

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

A search for single top quark production is performed in the full e(+/-)p data sample collected by the H1 experiment at HERA, corresponding to an integrated luminosity of 474 pb(-1). Decays of top quarks into a b quark and a W boson with Subsequent leptonic or hadronic decay of the W are investigated. A multivariate analysis is performed to discriminate top quark production from Standard Model background processes. An upper limit on the top quark production cross section via flavour changing neutral current processes sigma(ep -> et X) < 0.25 pb is established at 95% CL. Limits on the anomalous coupling K-tu gamma are derived. (C) 2009 Elsevier B.V. All rights reserved.

引用

页码：450 / 458

页数：9

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