Search for supersymmetric particles in e+e- collisions at √s up to 202 GeV and mass limit for the lightest neutralino

被引：52

作者：

Barate, R ^{[1
]}

De Bonis, I

Decamp, D

Ghez, P

Goy, C

Jezequel, S

Lees, JP

Martin, F

Merle, E

Minard, MN

Pietrzyk, B

Bravo, S

Casado, MP

Chmeissani, M

Crespo, JM

Fernandez, E

Fernandez-Bosman, M

Garrido, L

Graugés, E

Lopez, J

Martinez, M

Merino, G

Miquel, R

Mir, LM

Pacheco, A

Paneque, D

Ruiz, H

Colaleo, A

Creanza, D

De Filippis, N

de Palma, M

Iaselli, G

Maggi, G

Maggi, M

Nuzzo, S

Ranieri, A

Raso, G

Ruggieri, F

Selvaggi, G

Silvestris, L

Tempesta, P

Tricomi, A

Zito, C

Huang, X

Lin, J

Ouyang, Q

Wang, T

Xie, Y

Xu, R

Xue, S

机构：

[1] IN2P3, CNRS, Phys Particules Lab, LAPP, F-74019 Annecy Le Vieux, France

[2] Univ Autonoma Barcelona, Inst Fis Altes Energies, E-08193 Barcelona, Spain

[3] Ist Nazl Fis Nucl, Sezione Bari, Dipartimento Fis, I-70126 Bari, Italy

[4] Acad Sinica, Inst High Energy Phys, Beijing, Peoples R China

[5] CERN, European Lab Particle Phys, CH-1211 Geneva 23, Switzerland

[6] Univ Blaise Pascal, Phys Corpusculaire Lab, IN2P3, CNRS, F-63177 Clermont Ferrand, France

[7] Niels Bohr Inst, DK-2100 Copenhagen, Denmark

[8] Democritos Nucl Res Ctr, NRCD, GR-15310 Attiki, Greece

[9] Ecole Polytech, IN2P3, CNRS, Lab Phys Nucl & Hautes Energies, F-91128 Palaiseau, France

[10] Univ Florence, Dipartimento Fis, Ist Nazl Fis Nucl, Sezione Firenze, I-50125 Florence, Italy

[11] Ist Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, Italy

[12] Univ Glasgow, Dept Phys & Astron, Glasgow G12 8QQ, Lanark, Scotland

[13] Heidelberg Univ, Kirchoff Inst Phys, D-69120 Heidelberg, Germany

[14] Univ London Imperial Coll Sci Technol & Med, Dept Phys, London SW7 2BZ, England

[15] Univ Innsbruck, Inst Expt Phys, A-6020 Innsbruck, Austria

[16] Univ Lancaster, Dept Phys, Lancaster LA1 4YB, England

[17] Johannes Gutenberg Univ Mainz, Inst Phys, D-55099 Mainz, Germany

[18] Univ Mediteranee, CNRS, IN2P3, Ctr Phys Particules Marseille, F-13288 Marseille, France

[19] Univ Milan, Dipartimento Fis, I-20133 Milan, Italy

[20] Ist Nazl Fis Nucl, Sezione Milano, I-20133 Milan, Italy

[21] Max Planck Inst Phys & Astrophys, Werner Heisenberg Inst, D-80805 Munich, Germany

[22] Univ Paris 11, Lab Accelerateur Lineaire, IN2P3, CNRS, F-91898 Orsay, France

[23] Univ Pisa, Dipartimento Fis, Ist Nazl Fis Nucl, Sezione Pisa, I-56010 Pisa, Italy

[24] Scuola Normale Super Pisa, I-56010 Pisa, Italy

[25] Univ London Royal Holloway & Bedford New Coll, Dept Phys, Egham TW20 0EX, Surrey, England

[26] Rutherford Appleton Lab, Particle Phys Dept, Didcot OX11 0QX, Oxon, England

[27] Ctr Etud Saclay, CEA, DAPNIA, Serv Phys Particules, F-91191 Gif Sur Yvette, France

[28] Univ Calif Santa Cruz, Inst Particle Phys, Santa Cruz, CA 95064 USA

[29] Univ Sheffield, Dept Phys, Sheffield S3 7RH, S Yorkshire, England

[30] Univ Siegen, Fachbereich Phys, D-57068 Siegen, Germany

[31] Univ Trieste, Dipartmento Fis, I-34127 Trieste, Italy

[32] Ist Nazl Fis Nucl, Sezione Trieste, I-34127 Trieste, Italy

[33] Univ Washington, Expt Elementary Particule Phys, Seattle, WA 98195 USA

[34] Univ Wisconsin, Dept Phys, Madison, WI 53706 USA

[35] Univ Barcelona, Barcelona 08208, Spain

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

[37] Univ Palermo, Dipartimento Fis & Tecnol Relat, Palermo, Italy

[38] Dipartimento Fis, I-95129 Catania, Italy

[39] Ist Nazl Fis Nucl, Sezione Catania, I-95129 Catania, Italy

[40] Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA

[41] CNR, Ist Cosmogeofis, I-10133 Turin, Italy

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

[43] Tsinghua Univ, Dept Phys, Beijing 100084, Peoples R China

来源：

PHYSICS LETTERS B | 2001年 / 499卷 / 1-2期

关键词：

D O I：

10.1016/S0370-2693(01)00015-6

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Searches for pair production of squarks, sleptons, charginos and neutralinos are performed with the data collected by the ALEPH detector at LEP at centre-of-mass energies from 188.6 to 201.6 GeV. No evidence for any such signals is observed in a total integrated luminosity of about 410 ph(-1). The negative results of the searches are translated into exclusion domains in the space of the relevant MSSM parameters, which improve significantly on the constraints set previously. Under the assumptions of gaugino and sfermion mass unification, these results allow a 95% C.L. lower limit of 37 GeV/c(2) to be set on the mass of the lightest neutralino for any tan beta and sfermion mass. Additional constraints in the MSSM parameter space are derived from the negative results of ALEPH searches for Higgs bosons. The results are also interpreted in the framework of minimal supergravity. (C) 2001 Published by Elsevier Science B.V.

引用

页码：67 / 84

页数：18

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