A MEASUREMENT OF A(FB)(B) IN LIFETIME TAGGED HEAVY FLAVOR Z DECAYS

被引：17

作者：

BUSKULIC, D

CASPER, D

DEBONIS, I

DECAMP, D

GHEZ, P

GOY, C

LEES, JP

MINARD, MN

ODIER, P

PETRZYK, B

ARIZTIZABAL, F

CHMEISSANI, M

CRESPO, JM

EFTHYMIOPOULOS, I

FERNANDEZ, E

FERNANDEZBOSMAN, M

GAITAN, V

GARRIDO, LI

MARTINEZ, M

MATTISON, T

ORTEU, S

PACHECO, A

PADILLO, C

PALLA, F

PASCUAL, A

PERLAS, JA

TEUBERT, F

CREANZA, D

DEPALMA, M

FARILLA, A

IASELLI, G

MAGGI, G

MARINELLI, N

NATALI, S

NUZZO, S

RANIERI, A

RASO, G

ROMANO, F

RUGGIERI, F

SELVAGGI, G

SILVESTRIS, L

TEMPESTA, P

ZITO, G

CHAI, Y

HUANG, D

HUANG, X

LIN, J

WANG, T

XIE, Y

XU, D

机构：

[1] UNIV AUTONOMA BARCELONA, INST FIS ALTES ENERGIES, F-08193 BELLATERRA, FRANCE

[2] INFN, DIPARTIMENTO FIS, SEZ BARI, I-70126 BARI, ITALY

[3] CHINESE ACAD SCI, INST HIGH ENERGY PHYS, BEIJING, PEOPLES R CHINA

[4] CERN, DIV PPE, CH-1211 GENEVA 23, SWITZERLAND

[5] UNIV CLERMONT FERRAND, PHYS CORPUSCULAIRE LAB, IN2P3, CNRS, F-63177 CLERMONT FERRAND, FRANCE

[6] NIELS BOHR INST, DK-21000 COPENHAGEN, DENMARK

[7] NRCD, ATHENS, GREECE

[8] ECOLE POLYTECH, PHYS NUCL & HAUTES ENERGIES LAB, IN2P3, CNRS, F-91128 PALAISEAU, FRANCE

[9] MAX PLANCK INST PHYS & ASTROPHYS, WERNER HEISENBERG INST, D-80805 MUNICH, GERMANY

[10] UNIV PARIS 11, ACCELERATEUR LINEAIRE LAB, IN2P3, CNRS, F-91405 ORSAY, FRANCE

[11] UNIV PISQ, INFN, DIPARTIMENTO FIS, SEZ PISA, I-56010 PISA, ITALY

[12] SCUOLA NORMALE SUPER PISA, I-56010 PISA, ITALY

[13] UNIV LONDON, ROYAL HOLLOWAY & BEDFORD NEW COLL, DEPT PHYS, SURREY TW20 0EX, ENGLAND

[14] RUTHERFORD APPLETON LAB, DEPT PARTICLE PHYS, DIDCOT OX11 0QX, OXON, ENGLAND

[15] CENS, CEA, DAPNIA, SERV PHYS PARICULES, F-91191 GIF SUR YVETTE, FRANCE

[16] UNIV CALIF SANTA CRUZ, INST PARTICILE PHYS, SANTA CRUZ, CA 95064 USA

[17] UNIV SHEFFIELD, DEPT PHYS, SHEFFIELD S3 7RH, S YORKSHIRE, ENGLAND

[18] UNIV TRIESTE, DIPARTIMENTO FIS, I-34127 TRIESTE, ITALY

[19] UNIV EDINBURGH, DEPT PHYS, EDINBURGH EH9 3JZ, MIDLOTHIAN, SCOTLAND

[20] UNIV FLORENCE, DIPARTIMENTO FIS, I-50125 FLORENCE, ITALY

[21] INFN, SEZ FIRENZE, I-50125 FLORENCE, ITALY

[22] FLORIDA STATE UNIV, SUPERCOMP COMPUTAT RES INST, TALLAHASSEE, FL 32306 USA

[23] INFN, LNF, I-00044 FRASCATI, ITALY

[24] UNIV GLASGOW, DEPT PHYS & ASTRON, GLASGOW G12 8QQ, SCOTLAND

[25] UNIV HEIDELBERG, INST HOCHENERGIEPHYS, D-69120 HEIDELBERG, GERMANY

[26] UNIV LONDON IMPERIAL COLL SCI TECHNOL & MED, DEPT PHYS, LONDON SW7 2BZ, ENGLAND

[27] UNIV INNSBRUCK, INST EXPTL PHYS, A-6020 INNSBRUCK, AUSTRIA

[28] UNIV LANCASTER, DEPT PHYS, LANCASTER LA1 4YB, ENGLAND

[29] UNIV MAINZ, INST PHYS, D-55099 MAINZ, GERMANY

[30] FAC SCI LUMINY, CTR PHYS PARTICULES, IN2P3, CNRS, F-13288 MARSEILLE, FRANCE

[31] UNIV SIEGEN, FACHBEREICH PHYS, D-57068 SIEGEN, GERMANY

[32] INFN, SEZ TRIESTE, I-34127 TRIESTE, ITALY

[33] UNIV WISCONSIN, DEPT PHYS, MADISON, WI 53706 USA

[34] UNIV WASHINGTON, SEATTLE, WA 98195 USA

[35] UNIV TURIN, IST FIS GEN, I-10124 TURIN, ITALY

[36] CNR, IST COMO GEOPHYS, TURIN, ITALY

[37] KANGNUNG NATL UNIV, KANGNUNG, SOUTH KOREA

来源：

PHYSICS LETTERS B | 1994年 / 335卷 / 01期

基金：

中国国家自然科学基金;

关键词：

D O I：

10.1016/0370-2693(94)91564-4

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

A new measurement of the forward-backward asymmetry in Z --> bbBAR decays is presented. Hadrons from b decays are tagged using their long lifetimes. The b quark charge and direction are reconstructed with a hemisphere charge algorithm. The asymmetry and reconstructed b hemisphere charge are measured in the 69 pb-1 of data collected by ALEPH during 1991, 1992 and 1993. They are used to extract sin2theta(w)eff, which is determined to be 0.2315 +/- 0.0016 (stat.) +/- 0.0009 (syst.), corresponding to an A(FB)b of 0.00992 +/- 0.0084 (stat.) +/- 0.0046 (stat.).

引用

页码：99 / 108

页数：10

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