Measurement of AFBb(b)over-bar in hadronic Z decays using a jet charge technique

被引：15

作者：

Abreu, P ^{[1
]}

Adam, W

Adye, T

Adzic, P

Albrecht, Z

Aldeweireld, T

Alekseev, GD

Alemany, R

Allmendinger, T

Allport, PP

Almehed, S

Amaldi, U

Amato, S

Anassontzis, EG

Andersson, P

Andreazza, A

Andringa, S

Antilogus, P

Apel, WD

Arnoud, Y

Åsman, B

Augustin, JE

Augustinus, A

Baillon, P

Bambade, P

Barao, F

Barbiellini, G

Barbier, R

Bardin, DY

Barker, G

Baroncelli, A

Battaglia, M

Baubillier, M

Becks, KH

Begalli, M

Beilliere, P

Belokopytov, Y

Belous, K

Benvenuti, AC

Berat, C

Berggren, M

Bertini, D

Bertrand, D

Besancon, M

Bianchi, F

Bigi, M

Bilenky, MS

Bizouard, MA

Bloch, D

Blom, HM

机构：

[1] Inst Super Tecn, LIP, FCUL, Av Elias Garcia 14-1, P-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] ULB, VUB, 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, N-5007 Bergen, Norway

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

[9] Ist Nazl Fis Nucl, I-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 Estado 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, F-75231 Paris 05, France

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

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

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

[18] CAS, Inst Phys, FZU, Div High Energy Phys, CZ-18040 Prague 8, Czech Republic

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

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

[21] Univ Grenoble 1, IN2P3, CNRS, Inst Neurol Sci, F-38026 Grenoble, France

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

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

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

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

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

[27] Univ Paris Sud, Lab Accelerateur Lineaire, IN2P3, CNRS, F-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, LPNHE, IN2P3, CNRS, F-75252 Paris 05, France

[31] Univ Paris 07, F-75252 Paris 05, France

[32] Lund Univ, Dept Phys, S-22363 Lund, Sweden

[33] Univ Lyon 1, IPNL, IN2P3, CNRS, F-69622 Villeurbanne, France

[34] Univ Aix Marseille 2, CPP, IN2P3, CNRS, F-13288 Marseille 09, France

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

[36] Ist Nazl Fis Nucl, I-20133 Milan, Italy

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

[38] Charles Univ Prague, Nucl Ctr, MFF, CZ-18000 Prague 8, Czech Republic

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

[40] Univ Oslo, Dept Phys, N-1000 Oslo 3, Norway

[41] Univ Oviedo, Dept Fis, E-33007 Oviedo, Spain

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

[43] Univ Padua, Dipartimento Fis, I-35131 Padua, Italy

[44] Ist Nazl Fis Nucl, I-35131 Padua, Italy

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

[46] Univ Roma Tor Vergata, Dipartimento Fis, I-00173 Rome, Italy

[47] Ist Nazl Fis Nucl, I-00173 Rome, Italy

[48] Univ Roma 3, Dipartimento Fis, I-00146 Rome, Italy

[49] Ist Nazl Fis Nucl, I-00146 Rome, Italy

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

来源：

EUROPEAN PHYSICAL JOURNAL C | 1999年 / 9卷 / 03期

关键词：

D O I：

10.1007/s100520050030

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

摘要：

The bb forward-backward asymmetry has been determined from the average charge how measured in a sample of 3,500,000 hadronic Z decays collected with the DELPHI detector in 1992 - 1995. The measurement is performed in an enriched b (b) over bar sample selected using an impact parameter tag and results in the following values for the bl; forward-backward asymmetry: A(FB)(b (b) over bar) (89.55 GeV) = 0.068 +/- 0.016 (stat.) +/- 0.0013(syst.) A(FB)(b (b) over bar)(91.26 GeV) = 0.0982 +/- 0.0047(stat.) +/- 0.0016(syst.) A(FB)(b (b) over bar)(92.94 GeV) = 0.123 +/- 0.016 (stat.) +/- 0.0027(syst.) The b (b) over bar charge separation required for this analysis is directly measured in the b tagged sample, while the other charge separations are obtained from a fragmentation model precisely calibrated to data. The effective weak mixing angle is deduced from the measurement to be: sin(2)theta(eff)1 = 0.23186 +/- 0.00063.

引用

页码：367 / 381

页数：15

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