Search for SUSY with R-parity violating LL(E)over-bar couplings at √s=189 GeV

被引：21

作者：

Abreu, P ^{[1
]}

Adam, W

Adye, T

Adzic, P

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

Åsman, 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

Belous, K

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-2610 Wilrijk, Belgium

[3] Free Univ Brussels, 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, Dipartimento 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 Estadual Rio de Janeiro, Inst Fis, Rio De Janeiro, Brazil

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

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

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

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

[16] Demokritos Natl Ctr Sci Res, Inst Nucl Phys, GR-15310 Athens, Greece

[17] CAS, Inst Phys, FZU, High Energy Phys Div, 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 Nucl Sci, FR-38026 Grenoble, France

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

[22] Joint Inst Nucl Res, 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, PL-30055 Krakow, Poland

[26] Univ Paris Sud, Lab Accelerateur Lineaire, IN2P3, CNRS, 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, LPHHE, FR-75252 Paris 05, France

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

[32] Univ Lyon 1, INPNL, IN2P3, CNRS, FR-69622 Villeurbanne, France

[33] Univ Aix Marseille 2, CPP, IN2P3, CNRS, F-13288 Marseille 09, France

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

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

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

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

[38] Niels Bohr Inst, DK-2100 Copenhagen O, Denmark

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

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

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

[42] Univ Oslo, Dept Phys, NL-1000 Oslo, Norway

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

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

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

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

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

[48] Univ Rome 2, Dipartimento Fis, IT-00173 Rome, Italy

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

[50] Univ Rome 2, Dipartimento Fis, IT-00146 Rome, Italy

来源：

PHYSICS LETTERS B | 2000年 / 487卷 / 1-2期

关键词：

D O I：

10.1016/S0370-2693(00)00776-0

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Searches for pair production of supersymmetric particles under the assumption that R-parity is not conserved are presented, based on data recorded by the DELPHI detector in 1998 from e(+)e(-) collisions at a centre-of-mass energy of 189 GeV. Only one R-parity violating LL (E) over bar term (i.e. one lambda coupling), which couples scalar leptons to leptons, is considered to be dominant at a time. Moreover, it is assumed that the strength of the R-parity violating couplings is such that the lifetimes can be neglected. The search for pair production of neutralinos, charginos and sleptons has been performed for both direct R-parity violating decays and indirect cascade decays. The results are in agreement with Standard Model expectations, and are used to update the constraints on the MSSM parameter values and the mass limits previously derived at root s = 183 GeV. The present 95% C.L. Limits on supersymmetric particle masses are: m(<(chi)over tilde>0) > 30 GeV/c(2) and m(<(chi)over tilde>+/-) > 94 GeV/c(2); m(<(nu)over tilde>) > 76.5 GeV/c(2) (direct and indirect decays); m((l) over tilde R) > 83 GeV/c(2) (indirect decay only). (C) 2000 Elsevier Science B.V. All rights reserved.

引用

页码：36 / 52

页数：17

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