Search for R-parity violation with a (U)over-bar(D)over-bar(D)over-bar coupling at √s ≈ 189 GeV

被引：15

作者：

Abreu, P ^{[1
]}

Adam, W

Adye, T

Adzic, P

Ajinenko, I

Albrecht, Z

Alderweireld, T

Alekseev, GD

Alemany, R

Allmendinger, T

Allport, PP

Almehed, S

Amaldi, U

Amapane, N

Amato, S

Anassontzis, EG

Andersson, P

Andreazza, A

Andringa, S

Antilogus, P

Apel, WD

Arnoud, Y

Asman, B

Augustin, JE

Augustinus, A

Baillon, P

Ballestrero, A

Bambade, P

Barao, F

Barbiellini, G

Barbier, R

Bardin, DY

Barker, G

Baroncelli, A

Battaglia, M

Baubillier, M

Becks, KH

Begalli, M

Behrmann, A

Beilliere, P

Belokopytov, Y

Benekos, NC

Benvenuti, AC

Berat, C

Berggren, M

Berntzon, L

Bertrand, D

Besancon, M

Bilenky, MS

Bizouard, MA

机构：

[1] Iowa State Univ, Dept Phys & Astron, Ames, IA 50011 USA

[2] Univ Instelling Antwerp, Dept Phys, B-1050 Brussels, Belgium

[3] ULB, VUB, IIHE, B-1050 Brussels, Belgium

[4] Univ Mons, Fac Sci, B-7000 Mons, Belgium

[5] Univ Athens, Phys Lab, GR-10680 Athens, Greece

[6] Univ Bergen, Dept Phys, NO-5007 Bergen, Norway

[7] Univ Bologna, Dipartmento Fis, IT-40126 Bologna, Italy

[8] Ist Nazl Fis Nucl, IT-40126 Bologna, Italy

[9] Ctr Brasileiro Pesquisas Fis, BR-22290 Rio De Janeiro, Brazil

[10] Pontificia Univ Catolica Rio de Janeiro, Dept Fis, BR-22453 Rio De Janeiro, Brazil

[11] Univ Estado Rio De Janeiro, Inst Fis, Rio De Janeiro, Brazil

[12] Comenius Univ, Fac Math & Phys, SK-84215 Bratislava, Slovakia

[13] Coll France, CNRS, IN2P3, Phys Corpusculaire Lab, FR-75231 Paris 05, France

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

[15] ULP, CNRS, IN2P3, Inst Rech Subatom, FR-67037 Strasbourg, France

[16] NCSR Demokritos, Inst Nucl Phys, GR-15310 Athens, Greece

[17] CAS, Inst Phys, FZU, Div High Energy Phys, CZ-18040 Prague 8, Czech Republic

[18] Univ Genoa, Dipartimento Fis, IT-16146 Genoa, Italy

[19] Ist Nazl Fis Nucl, IT-16146 Genoa, Italy

[20] Univ Grenoble 1, CNRS, IN2P3, Inst Sci Nucl, FR-38026 Grenoble, France

[21] Helsinki Inst Phys, FI-00014 Helsinki, Finland

[22] Dubna Joint Nucl Res Inst, RU-101000 Moscow, Russia

[23] Univ Karlsruhe, Inst Expt Kernphys, DE-76128 Karlsruhe, Germany

[24] Inst Nucl Phys, PL-30055 Krakow, Poland

[25] Univ Min & Met Krakow, PL-30055 Krakow, Poland

[26] Univ Paris 11, CNRS, IN2P3, Lab Accelerateur Lineaire, FR-91405 Orsay, France

[27] Univ Lancaster, Sch Phys & Chem, Lancaster LA1 4YB, England

[28] FCUL, IST, LIP, PT-1000 Lisbon, Portugal

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

[30] Univ Paris 06, CNRS, IN2P3, LPNHE, FR-75252 Paris 05, France

[31] Univ Paris 07, CNRS, IN2P3, LPNHE, FR-75252 Paris 05, France

[32] Lund Univ, Dept Phys, SE-22363 Lund, Sweden

[33] Univ Lyon 1, CNRS, IN2P3, IPNL, FR-69622 Villeurbanne, France

[34] Univ Aix Marseille 2, CNRS, IN2P3, CPP, FR-13288 Marseille 09, France

[35] Univ Milan, Dipartimento Fis, IT-20133 Milan, Italy

[36] MILANO, Ist Nazl Fis Nucl, IT-20133 Milan, Italy

[37] Univ Milan, Dipartimento Fis, IT-20126 Milan, Italy

[38] MILANO, Ist Nazl Fis Nucl, IT-20126 Milan, Italy

[39] Niels Bohr Inst, DK-2100 Copenhagen 0, Denmark

[40] Charles Univ Prague, IPNP MFF, Areal MFF, CZ-18000 Prague 8, Czech Republic

[41] NIKHEF H, NL-1009 DB Amsterdam, Netherlands

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

[43] Univ Oslo, Dept Phys, NO-1000 Oslo 3, Norway

[44] Univ Oviedo, Dept Fis, ES-33007 Oviedo, Spain

[45] Univ Oxford, Dept Phys, Oxford OX1 3RH, England

[46] Univ Padua, Dipartimento Fis, IT-35131 Padua, Italy

[47] Ist Nazl Fis Nucl, IT-35131 Padua, Italy

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

[49] Univ Roma Tor Vergata, Dipartimento Fis, IT-00173 Rome, Italy

[50] Ist Nazl Fis Nucl, IT-00173 Rome, Italy

来源：

PHYSICS LETTERS B | 2001年 / 500卷 / 1-2期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1016/S0370-2693(01)00017-X

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Searches for pair production of gauginos and squarks in e(+)e(-) collisions at a centre-of-mass energy of 189 GeV have been performed on data corresponding to an integrated luminosity of 158 pb(-1) collected by the DELPHI detector at LEP. The data were analyzed under the assumption of non-conservation of R-parity through a single dominant (U) over bar(D) over bar(D) over bar coupling between squarks and quarks. Typical final states contain between 4 and 10 jets with or without additional leptons. No excess of data above Standard Model expectations was observed. The results were used to constrain domains of the MSSM parameter space and derive limits on the masses of supersymmetric particles. The following mass limits at 95% CL were obtained from these searches: neutralino mass: m(<(<chi>)over tilde>1)(0) greater than or equal to 32 GeV; chargino mass: m(<(<chi>)over tilde>1)(+) greater than or equal to 94 GeV; stop and sboctom mass (indirect decay) with DeltaM > 5 GeV: m((t) over tilde1) greater than or equal to 74 GeV for Phi (mix) = 0 rad, m((t) over tilde1) greater than or equal to 59 GeV for Phi (mix) = 0.98 rad, m((b) over tilde1) greater than or equal to 72 GeV for Phi (mix) = 0 rad. The angle phi (mix) is the mixing angle between left and right handed quarks. (C) 2001 Elsevier Science B.V. All rights reserved.

引用

页码：22 / 36

页数：15

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