A search for leptoquark bosons in e- p collisions at HERA

被引：25

作者：

Adloff, C

Andreev, V

Andrieu, B

Anthonis, T

Arkadov, V

Astvatsatourov, A

Babaev, A

Bähr, J

Baranov, P

Barrelet, E

Bartel, W

Bate, P

Becker, J

Beglarian, A

Behnke, O

Beier, C

Belousov, A

Benisch, T

Berger, C

Berndt, T

Bizot, JC

Boehme, J

Boudry, V

Braunschweig, W

Brisson, V

Bröker, HB

Brown, DP

Brückner, W

Bruncko, D

Bürger, J

Büsser, FW

Bunyatyan, A

Burrage, A

Buschhorn, G

Bystritskaya, L

Campbell, AJ

Cao, J

Caron, S

Cassol-Brunner, F

Clarke, D

Clerbaux, B

Collard, C

Contreras, JG

Coppens, YR

Coughlan, JA

Cousinou, MC

Cox, BE

Cozzika, G

Cvach, J

Dainton, JB

机构：

[1] Berg Univ Gesamthsch Wuppertal, Fachbereich Phys, Wuppertal, Germany

[2] Rhein Westfal TH Aachen, Inst Phys 1, D-5100 Aachen, Germany

[3] Rhein Westfal TH Aachen, Inst Phys 3, D-5100 Aachen, Germany

[4] Univ Birmingham, Sch Phys & Space Res, Birmingham B15 2TT, W Midlands, England

[5] Free Univ Brussels, Interuniv Inst High Energies, Brussels, Belgium

[6] Univ Instelling Antwerp, B-2610 Wilrijk, Belgium

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

[8] Inst Nucl Phys, Krakow, Poland

[9] Univ Dortmund, Inst Phys, D-4600 Dortmund, Germany

[10] Joint Inst Nucl Res, Dubna, Russia

[11] CE Saclay, CEA, DSM, DAPNIA, Gif Sur Yvette, France

[12] DESY, D-2000 Hamburg, Germany

[13] Univ Hamburg, Inst Expt Phys 2, D-2000 Hamburg, Germany

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

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

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

[17] Univ Kiel, Inst Expt & Angew Phys, Kiel, Germany

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

[19] Univ Lancaster, Sch Phys & Chem, Lancaster, England

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

[21] Univ London Queen Mary & Westfield Coll, London E1 4NS, England

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

[23] Univ Manchester, Dept Phys, Manchester M13 9PL, Lancs, England

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

[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, F-91405 Orsay, France

[29] Ecole Polytech, CNRS, LPNHE, IN2P3, F-91128 Palaiseau, France

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

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

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

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

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

[35] INFN Roma 3, Rome, Italy

[36] Paul Scherrer Inst, Villigen, Switzerland

[37] Yerevan Phys Inst, Yerevan 375036, Armenia

[38] DESY, Zeuthen, Germany

[39] ETH Zurich, Inst Teilchenphys, Zurich, Switzerland

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

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

[42] Berg Univ Gesamthsch Wuppertal, Rechenzentrum, Wuppertal, Germany

[43] Univ Karlsruhe, Inst Expt Kernphys, D-7500 Karlsruhe, Germany

[44] CINVESTAV, Dept Fis Ap, Merida, Yucatan, Mexico

[45] Safarik Univ, Kosice, Slovakia

[46] CERN, Geneva, Switzerland

[47] CINVESTAV, Dept Fis, Mexico City 14000, DF, Mexico

来源：

PHYSICS LETTERS B | 2001年 / 523卷 / 3-4期

关键词：

D O I：

10.1016/S0370-2693(01)01262-X

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

A search for scalar and vector leptoquarks coupling to first generation fermions is performed in the H1 experiment at the ep collider HERA. The analysis uses e-p data collected in 1998 and 1999 at a centre-of-mass energy of 320 GeV, corresponding to an integrated luminosity of similar to 15 pb(-1). No evidence for the direct production of such particles is found in a data sample with a large transverse momentum final state electron or with large missing transverse momentum, and constraints on leptoquark models are established. For a Yukawa coupling of electromagnetic strength leptoquarks are excluded for masses up to similar to 290 GeV. This analysis complements the leptoquark searches performed previously using data collected whilst HERA was operating with positrons instead of electrons. (C) 2001 Elsevier Science B.V. All rights reserved.

引用

页码：234 / 242

页数：9

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