A study of single W production in e+e- collisions at √s=161-183 GeV

被引:22
|
作者
Barate, R [1 ]
Decamp, D
Ghez, P
Goy, C
Jezequel, S
Lees, JP
Martin, F
Merle, E
Minard, MN
Pietrzyk, B
Przysiezniak, H
Alemany, R
Casado, MP
Chmeissani, M
Crespo, JM
Fernandez, E
Fernandez-Bosman, M
Garrido, L
Graugès, E
Juste, A
Martinez, M
Merino, G
Miquel, R
Mir, LM
Morawitz, P
Pacheco, A
Park, IC
Riu, I
Colaleo, A
Creanza, D
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, G
Huang, X
Lin, J
Ouyang, Q
Wang, T
Xie, Y
Xu, R
Xue, S
机构
[1] Phys Particules Lab, CNRS, IN2P3, F-74019 Annecy Le Vieux, France
[2] Univ Autonoma Barcelona, Inst Fis Altes Energies, E-08193 Barcelona, Spain
[3] Ist Nazl Fis Nucl, Dipartimento Fis, Sez Bari, 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 Clermont Ferrand, Phys Corpusculaire Lab, CNRS, IN2P3, F-63177 Clermont Ferrand, Aubiere, France
[7] Niels Bohr Inst, DK-2100 Copenhagen, Denmark
[8] Democritos Nucl Res Ctr, GR-15310 Athens, Greece
[9] Ecole Polytech, Lab Phys Nucl & Hautes Energies, CNRS, IN2P3, F-91128 Palaiseau, France
[10] Univ Florence, Dipartimento Fis, Ist Nazl Fis Nucl, Sez Firenze, I-50125 Florence, Italy
[11] Florida State Univ, Supercomp Computat Res Inst, Tallahassee, FL 32306 USA
[12] Ist Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, Italy
[13] Univ Glasgow, Dept Phys & Astron, Glasgow G12 8QQ, Lanark, Scotland
[14] Univ Heidelberg, Inst Hochenergiephys, D-69120 Heidelberg, Germany
[15] Univ London Imperial Coll Sci Technol & Med, Dept Phys, London SW7 2BZ, England
[16] Univ Innsbruck, Inst Expt Phys, A-6020 Innsbruck, Austria
[17] Univ Lancaster, Dept Phys, Lancaster LA1 4YB, England
[18] Johannes Gutenberg Univ Mainz, Inst Phys, D-55099 Mainz, Germany
[19] Fac Sci Luminy, Ctr Phys Particules, CNRS, IN2P3, F-13288 Marseille, France
[20] Univ Milan, Dipartimento Fis, I-20133 Milan, Italy
[21] Ist Nazl Fis Nucl, Sez Milano, I-20133 Milan, Italy
[22] Max Planck Inst Phys & Astrophys, Werner Heisenberg Inst, D-80805 Munich, Germany
[23] Univ Paris 11, Lab Accelerateur Lineaire, CNRS, IN2P3, F-91898 Orsay, France
[24] Univ Pisa, Dipartimento Fis, Ist Nazl Fis Nucl, Sez Pisa, I-56010 Pisa, Italy
[25] Scuola Normale Super Pisa, I-56010 Pisa, Italy
[26] Univ London Royal Holloway & Bedford New Coll, Dept Phys, Egham TW20 0EX, Surrey, England
[27] Rutherford Appleton Lab, Particle Phys Dept, Didcot OX11 0QX, Oxon, England
[28] Ctr Etud Saclay, Serv Phys Particules, CEA, DAPNIA, F-91191 Gif Sur Yvette, France
[29] Univ Calif Santa Cruz, Inst Particle Phys, Santa Cruz, CA 95064 USA
[30] Univ Sheffield, Dept Phys, Sheffield S3 7RH, S Yorkshire, England
[31] Univ Siegen, Fachbereich Phys, D-57068 Siegen, Germany
[32] Univ Trieste, Dipartimento Fis, I-34127 Trieste, Italy
[33] Ist Nazl Fis Nucl, Sez Trieste, I-34127 Trieste, Italy
[34] Univ Washington, Expt Elementary Particle Phys, Seattle, WA 98195 USA
[35] Univ Wisconsin, Dept Phys, Madison, WI 53706 USA
[36] Univ Barcelona, E-08028 Barcelona, Spain
[37] Ist Nazl Fis Nucl, Ctr Siciliano Fis Nucl & Struttura Mat, Sez Catania, I-95129 Catania, Italy
[38] Univ Turin, Ist Fis Gen, I-10125 Turin, Italy
[39] CNR, Ist Cosmogeofis, I-10133 Turin, Italy
关键词
D O I
10.1016/S0370-2693(99)00899-0
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
Single W production is studied in the data recorded with the ALEPH detector at LEP at centre-of-mass energies between 161 and 183 GeV. The cross section is measured to be sigma(w) = 0.41 +/- 0.17(stat.) +/- 0.04(syst.) pb at 183 GeV, consistent with the Standard Model expectation. Limits on non-standard WW gamma couplings are deduced as -1.6 < kappa gamma < 1.5 (lambda(gamma) = 0) and -1.6 < lambda(gamma) < 1.6 (kappa(gamma) = 1) at 95% C.L. A search for effectively invisible decays of the W boson in W pair production is performed, leading to an upper Limit on the branching ratio of 1.3% (Gamma(inv) = 27 MeV) at 95% C.L. (C) 1999 Elsevier Science B.V. All rights reserved.
引用
收藏
页码:389 / 400
页数:12
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