Measurement of the ZZ cross-section in e+e- interactions at 183-189 GeV

被引：6

作者：

Abreu, P

Adam, W

Adye, T

Adzic, P

Ajinenko, I

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

Benekos, NC

Benvenuti, AC

Berat, C

Berggren, M

Berntzon, L

Bertrand, D

Besancon, M

Bilenky, MS

Bizouard, MA

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 Antwerp, Belgium

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

[5] Univ Etat 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, CNRS, IN2P3, Phys Corpusculaire Lab, F-75231 Paris 05, France

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

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

[17] DESY Zeuthen, D-15735 Zeuthen, Germany

[18] NCSR Demokritos, Inst Nucl Phys, GR-15310 Athens, Greece

[19] Acad Sci Czech Republ, Inst Phys, High Energy Phys Div, FZU, CZ-18040 Prague 8, Czech Republic

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

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

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

[23] HIP, FI-00014 Helsinki, Finland

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

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

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

[27] Univ Min & Met Krakow, PL-30055 Krakow, Poland

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

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

[30] Univ Liverpool, Dept Phys, Liverpool L69 3BX, Merseyside, England

[31] Univ Paris 06, CNRS, IN2P3, LPHNE, FR-75252 Paris 05, France

[32] Univ Paris 07, CNRS, IN2P3, LPHNE, FR-75252 Paris 05, France

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

[34] Univ Lyon 1, CNRS, IN2P3, IPNL, FR-69622 Villeurbanne, France

[35] Univ Aix Marseille 2, CNRS, IN2P3, CPP, FR-13288 Marseille 09, France

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

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

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

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

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

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

[42] NIKHEF, NL-1009 DB Amsterdam, Netherlands

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

[44] Univ Oslo, Dept Phys, NO-1000 Oslo 3, Norway

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

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

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

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

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

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

来源：

PHYSICS LETTERS B | 2001年 / 497卷 / 3-4期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1016/S0370-2693(00)01346-0

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Measurements of on-shell ZZ production are described, using data collected by DELPHI in 1997 and 1998, at centre-of-mass energies roots = 182.6 GeV and 188.6 GeV, respectively. Results obtained in each of the final states q (q) over barq (q) over bar, mu (+)mu (-) q (q) over bar e(+)e(-)q (q) over bar, nu<(<nu>)over bar>q (q) over bar, l(+)l(-)l(+)l(-), and nu<(<nu>)over bar>l(+)l(-) are presented. The measured cross-sections for on-shell ZZ production via the tree-level doubly-resonant graphs (NC02) are: sigma (NC02) (182.6 GeV) = 0.38 +/- 0.18 (stat) +/- 0.04 (syst) pb, sigma (NC02) (188.6 GeV) = 0.60+/-0.13 (stat) +/- 0.07 (syst) pb. They are consistent with the Standard Model expectations of 0.25 and 0.65 pb at each energy. (C) 2001 Published by Elsevier Science B.V.

引用

页码：199 / 213

页数：15

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