W pair production cross-section and W branching fractions in e+e- interactions at 189 GeV

被引：28

作者：

Abreu, P

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

Bertrand, D

Besancon, M

Bilenky, MS

Bizouard, MA

Bloch, D

机构：

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

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

[3] Univ Instelling Antwerp, Dept Phys, B-2610 Wilrijk, Belgium

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

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

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

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

[8] Univ Bologna, Dipartimento Fis, IT-40126 Bologna, Italy

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

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

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

[12] Univ Estadual Rio De Janeiro, Inst Fis, Rio De Janeiro, Brazil

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

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

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

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

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

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

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

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

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

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

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

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

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

[26] Stanislaw Staszic Univ Min & Met, PL-30055 Krakow, Poland

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

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

[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, FR-75252 Paris 05, France

[32] Univ Lund, 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] Ist Nazl Fis Nucl, IT-20133 Milan, Italy

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

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

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

[40] Charles Univ, MFF, IPNP, Areal NFF, CZ-18000 Prague, 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 Rome 2, Dipartimento Fis, IT-00173 Rome, Italy

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

来源：

PHYSICS LETTERS B | 2000年 / 479卷 / 1-3期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1016/S0370-2693(00)00314-2

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The cross-section for the process e(+)e(-) --> W+ W- has been measured with the data sample collected by DELPHI at an average centre-of-mass energy of 189 GeV and corresponding to an integrated luminosity of 155 pb(-1). Based on the 2392 events selected as WW candidates, the cross-section for the doubly resonant process e(+)e(-) --> W+W- has been measured to be 15.83 +/- 0.38 (stat) +/- 0.20(syst)pb. The branching fractions of the W decay were also measured and found to be in good agreement with the Standard Model expectation. From these a value of the CKM mixing matrix element \ V-cs\ = 1.001 +/- 0.040 (stat) +/- 0.020(syst) was derived. (C) 2000 Elsevier Science B.V. All rights reserved.

引用

页码：89 / 100

页数：12

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