Searches at HERA for squarks in R-parity violating supersymmetry

被引：21

作者：

Adloff, C ^{[1
]}

Andreev, V

Andrieu, B

Anthonis, T

Arkadov, V

Astvatsatourov, A

Ayyaz, I

Babaev, A

Bähr, J

Baranov, P

Barrelet, E

Bartel, W

Bassler, U

Bate, P

Beglarian, A

Behnke, O

Beier, C

Belousov, A

Benisch, T

Berger, C

Bernardi, G

Berndt, T

Bizot, JC

Boudry, V

Braunschweig, W

Brisson, V

Bröker, HB

Brown, DP

Brückner, W

Bruel, P

Bruncko, D

Bürger, J

Büsser, FW

Bunyatyan, A

Burkhardt, H

Burrage, A

Buschhorn, G

Campbell, AJ

Cao, J

Carli, T

Caron, S

Clarke, D

Clerbaux, B

Collard, C

Contreras, JG

Coppens, YR

Coughlan, JA

Cousinou, MC

Cox, BE

Cozzika, G

机构：

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

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

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

[4] CERN, Geneva, Switzerland

[5] Safarik Univ, Kosice, Slovakia

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

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

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

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

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

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

[12] DESY, Zeuthen, Germany

[13] Yerevan Phys Inst, Yerevan 375036, Armenia

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

[15] Paul Scherrer Inst, Villigen, Switzerland

[16] Ist Nazl Fis Nucl, Rome, Italy

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

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

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

[20] Univ Paris 07, IN2P3, CNRS, Paris, France

[21] Univ Paris 06, LPNHE, Paris, France

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

[23] Univ Paris 11, CNRS, IN2P3, LAL, F-91405 Orsay, France

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

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

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

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

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

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

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

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

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

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

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

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

[36] Univ Heidelberg, Kirchhoff Inst Phys, Heidelberg, Germany

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

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

[39] Univ Hamburg, Inst Expt Phys 2, Hamburg, Germany

[40] DESY, D-2000 Hamburg, Germany

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

[42] Joint Inst Nucl Res, Dubna, Russia

[43] Univ Dortmund, Inst Phys, Dortmund, Germany

[44] Inst Nucl Phys, Krakow, Poland

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

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

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

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

来源：

EUROPEAN PHYSICAL JOURNAL C | 2001年 / 20卷 / 04期

关键词：

D O I：

10.1007/s100520100716

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

摘要：

A search for squarks in R-parity violating supersymmetry is performed in e(+)p collisions at HERA at a centre of mass energy of 300 GeV, using HI data corresponding to an integrated luminosity of 37 pb(-1). The direct production of single squarks of any generation in positron-quark fusion via a Yukawa coupling lambda' is considered, taking into account R-parity violating and conserving decays of the squarks. No significant deviation from the Standard Model expectation is found. The results are interpreted in terms of constraints within the minimal Supersymmetric Standard Model (MSSM), the constrained MSSM and the minimal Supergravity model, and their sensitivity to the model parameters is studied in detail. For a Yukawa coupling of electromagnetic strength, squark masses below 260 GeV are excluded at 95% confidence level in a large part of the parameter space. For a 100 times smaller coupling strength masses up to 182 GeV are excluded.

引用

页码：639 / 657

页数：19

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