ZZ production in e+ e- int eractions at $\sqrt{s} =$ 183-209 G eV期刊界 All Journals 搜尽天下杂志传播学术成果专业期刊搜索期刊信息化学术搜索

按检索

ZZ production in e+ e- int eractions at $\sqrt{s} =$ 183-209 G eV

Authors:	The DELPHI Collaboration

Institution:	(1) Department of Physics and Astronomy, Iowa State University, Ames, IA 50011-3160, USA;(2) IIHE, ULB-VUB, Pleinlaan 2, 1050 Brussels, Belgium;(3) Physics Laboratory, University of Athens, Solonos Str. 104, 10680 Athens, Greece;(4) Department of Physics, University of Bergen, All?gaten 55, 5007 Bergen, Norway;(5) Dipartimento di Fisica, Universit? di Bologna and INFN, Via Irnerio 46, 40126 Bologna, Italy;(6) Centro Brasileiro de Pesquisas F?sicas, rua Xavier Sigaud 150, 22290 Rio de Janeiro, Brazil;(7) Inst. de F?sica, Univ. Estadual do Rio de Janeiro, rua S?o Francisco Xavier 524, Rio de Janeiro, Brazil;(8) Coll?ge de France, Lab. de Physique Corpusculaire, IN2P3-CNRS, 75231 Paris Cedex 05, France;(9) CERN, 1211 Geneva 23, Switzerland;(10) Institut de Recherches Subatomiques, IN2P3 – CNRS/ULP – BP20, 67037 Strasbourg Cedex, France;(11) DESY-Zeuthen, Platanenallee 6, 15735 Zeuthen, Germany;(12) Institute of Nuclear Physics, N.C.S.R. Demokritos, P.O. Box 60228, 15310 Athens, Greece;(13) FZU, Inst. of Phys., C.A.S. High Energy Physics Division, Na Slovance 2, 182 21 Praha 8, Czech Republic;(14) Dipartimento di Fisica, Universit? di Genova and INFN, Via Dodecaneso 33, 16146 Genova, Italy;(15) Institut des Sciences Nucl?aires, IN2P3-CNRS, Universit? de Grenoble 1, 38026 Grenoble Cedex, France;(16) Helsinki Institute of Physics and Department of Physical Sciences, P.O. Box 64, 00014 University of Helsinki, Finland;(17) Head Post Office, Joint Institute for Nuclear Research, Dubna, P.O. Box 79, 101 000 Moscow, Russian Federation;(18) Institut f?r Experimentelle Kernphysik, Universit?t Karlsruhe, Postfach 6980, 76128 Karlsruhe, Germany;(19) Institute of Nuclear Physics PAN, Ul. Radzikowskiego 152, 31142 Krakow, Poland;(20) Faculty of Physics and Nuclear Techniques, University of Mining and Metallurgy, 30055 Krakow, Poland;(21) Lab. de l’Acc?l?rateur Lin?aire, Universit? de Paris-Sud, IN2P3-CNRS, B?t. 200, 91405 Orsay Cedex, France;(22) School of Physics and Chemistry, University of Lancaster, Lancaster, LA1 4YB, UK;(23) LIP, IST, FCUL, Av. Elias Garcia, 14-1o, 1000 Lisboa Codex, Portugal;(24) Department of Physics, University of Liverpool, P.O. Box 147, Liverpool, L69 3BX, UK;(25) Dept. of Physics and Astronomy, Kelvin Building, University of Glasgow, Glasgow, G12 8QQ, UK;(26) LPNHE, IN2P3-CNRS, Univ. Paris VI et VII, Tour 33 (RdC), 4 place Jussieu, 75252 Paris Cedex 05, France;(27) Department of Physics, University of Lund, S?lvegatan 14, 223 63 Lund, Sweden;(28) Universit? Claude Bernard de Lyon, IPNL, IN2P3-CNRS, 69622 Villeurbanne Cedex, France;(29) Dipartimento di Fisica, Universit? di Milano and INFN-MILANO, Via Celoria 16, 20133 Milan, Italy;(30) Dipartimento di Fisica, Univ. di Milano-Bicocca and INFN-MILANO, Piazza della Scienza 3, 20126 Milan, Italy;(31) IPNP of MFF, Charles Univ., Areal MFF, V Holesovickach 2, 180 00 Praha 8, Czech Republic;(32) NIKHEF, Postbus 41882, 1009 DB Amsterdam, The Netherlands;(33) Physics Department, National Technical University, Zografou Campus, 15773 Athens, Greece;(34) Physics Department, University of Oslo, Blindern, 0316 Oslo, Norway;(35) Dpto. Fisica, Univ. Oviedo, Avda. Calvo Sotelo s/n, 33007 Oviedo, Spain;(36) Department of Physics, University of Oxford, Keble Road, Oxford, OX1 3RH, UK;(37) Dipartimento di Fisica, Universit? di Padova and INFN, Via Marzolo 8, 35131 Padua, Italy;(38) Rutherford Appleton Laboratory, Chilton, Didcot, OX11 OQX, UK;(39) Dipartimento di Fisica, Universit? di Roma II and INFN, Tor Vergata, 00173 Rome, Italy;(40) Dipartimento di Fisica, Universit? di Roma III and INFN, Via della Vasca Navale 84, 00146 Rome, Italy;(41) DAPNIA/Service de Physique des Particules, CEA-Saclay, 91191 Gif-sur-Yvette Cedex, France;(42) Instituto de Fisica de Cantabria (CSIC-UC), Avda. los Castros s/n, 39006 Santander, Spain;(43) Inst. for High Energy Physics, Serpukov, P.O. Box 35, Protvino, Moscow Region, Russian Federation;(44) J. Stefan Institute, Jamova 39, 1000 Ljubljana, Slovenia;(45) Laboratory for Astroparticle Physics, University of Nova Gorica, Kostanjeviska 16a, 5000 Nova Gorica, Slovenia;(46) Department of Physics, University of Ljubljana, 1000 Ljubljana, Slovenia;(47) Fysikum, Stockholm University, Box 6730, 113 85 Stockholm, Sweden;(48) Dipartimento di Fisica Sperimentale, Universit? di Torino and INFN, Via P. Giuria 1, 10125 Turin, Italy;(49) Dipartimento di Fisica Teorica, Universit? di Torino and INFN, Via Giuria 1, 10125 Turin, Italy;(50) Dipartimento di Fisica, Universit? di Trieste and INFN, Via A. Valerio 2, 34127 Trieste, Italy;(51) Istituto di Fisica, Universit? di Udine and INFN, 33100 Udine, Italy;(52) Univ. Federal do Rio de Janeiro, C.P. 68528 Cidade Univ., Ilha do Fund?o, 21945-970 Rio de Janeiro, Brazil;(53) Department of Radiation Sciences, University of Uppsala, P.O. Box 535, 751 21 Uppsala, Sweden;(54) IFIC, Valencia-CSIC, and D.F.A.M.N., U. de Valencia, Avda. Dr. Moliner 50, 46100 Burjassot, Valencia, Spain;(55) Institut f?r Hochenergiephysik, ?sterr. Akad. d. Wissensch., Nikolsdorfergasse 18, 1050 Vienna, Austria;(56) Inst. Nuclear Studies and University of Warsaw, Ul. Hoza 69, 00681 Warsaw, Poland;(57) University of Warwick, Coventry, CV4 7AL, UK;(58) Fachbereich Physik, University of Wuppertal, Postfach 100 127, 42097 Wuppertal, Germany;

Abstract:	Measurements of on-shell ZZ production are described, using data from the DELPHI experiment at LEP in e ⁺ e ^- collisions at centre-of-mass energies between 183 and 209 GeV, corresponding to an integrated luminosity of about 665 pb^-1. Results obtained in each of the final states $q \bar{q} q \bar{q}$ , $\nu \bar{\nu} q \bar{q}$ , $\mu^+ \mu^- q \bar{q}$ , $e^+e^- q \bar{q}$ , $\tau^+ \tau^- q \bar{q}$ , l ⁺ l ^- l ⁺ l ^-, and $\nu \bar{\nu} l^+l^-$ (with $l=e,\mu$ ) are presented. The measured production cross-sections are consistent with the Standard Model expectations. These results update and supersede those already published at 183 and 189 GeV.Received: 3 March 2002, Revised: 28 May 2003, Published online: 19 September 2003

Keywords:
本文献已被 SpringerLink 等数据库收录！

设为首页 | 免责声明 | 关于勤云 | 加入收藏