UPDATED MEASUREMENT OF THE AVERAGE B-HADRON LIFETIME

被引：21

作者：

BUSKULIC, D

DECAMP, D

GOY, C

LEES, JP

MINARD, MN

MOURS, B

ALEMANY, R

ARIZTIZABAL, F

COMAS, P

CRESPO, JM

DELFINO, M

FERNANDEZ, E

GAITAN, V

GARRIDO, L

MATTISON, T

PACHECO, A

PASCUAL, A

CREANZA, D

DEPALMA, M

FARILLA, A

IASELLI, G

MAGGI, G

MAGGI, M

NATALI, S

NUZZO, S

QUATTROMINI, M

RANIERI, A

RASO, G

ROMANO, F

RUGGIERI, F

SELVAGGI, G

SILVESTRIS, L

TEMPESTA, P

ZITO, G

HU, H

HUANG, D

HUANG, X

LIN, J

LOU, J

QIAO, C

WANG, T

XIE, Y

XU, D

XU, R

ZHANG, J

ZHAO, W

BAUERDICK, LAT

BLUCHER, E

BONVICINI, G

BOSSI, F

机构：

[1] UNIV AUTONOMA BARCELONA, INST FIS DALTES ENERGIES, E-08193 BARCELONA, SPAIN

[2] UNIV BARI, INFN, SEZ BARI, I-70126 BARI, ITALY

[3] UNIV BARI, DEPT PHYS, I-70126 BARI, ITALY

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

[5] CERN, CH-1211 GENEVA 23, SWITZERLAND

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

[7] NIELS BOHR INST, DK-2100 COPENHAGEN, DENMARK

[8] DEMOKRITOS NATL CTR SCI RES, GR-15310 ATHENS, GREECE

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

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

[11] UNIV FLORENCE, DEPT PHYS, INFN SEZ FIRENZE, I-50125 FLORENCE, ITALY

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

[13] FLORIDA STATE UNIV, DEPT PHYS, TALLAHASSEE, FL 32306 USA

[14] INFN, LAB NAZL, I-00044 FRASCATI, ITALY

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

[16] UNIV HEIDELBERG, INST HOCHENERGIEPHYS, W-6900 HEIDELBERG, GERMANY

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

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

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

[20] UNIV MAINZ, INST PHYS, W-6500 MAINZ, GERMANY

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

[22] MAX PLANCK INST PHYS & ASTROPHYS, WERNER HEISENBERG INST PHYS, W-8000 MUNICH 40, GERMANY

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

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

[25] UNIV PISA, SCUOLA NORMALE SUPER, I-56010 PISA, ITALY

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

[27] CENS, DAPNIA, SERV PHYS PARTICULES, F-91191 GIF SUR YVETTE, FRANCE

[28] UNIV CALIF SANTA CRUZ, INST PARTICLE PHYS, SANTA CRUZ, CA 95064 USA

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

[30] UNIV SIEGEN, FACHBEREICH PHYS, W-5900 SIEGEN, GERMANY

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

[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] UNIV NAPLES, DIPARTIMENTO SCI FIS, I-80138 NAPLES, ITALY

[37] CNR, IST COSMO GEOFIS, TURIN, ITALY

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

[39] LBL, BERKELEY, CA 94720 USA

来源：

PHYSICS LETTERS B | 1992年 / 295卷 / 1-2期

关键词：

D O I：

10.1016/0370-2693(92)90108-G

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

An improved measurement of the average lifetime of b hadrons has been performed with the ALEPH detector. From a sample of 260000 hadronic Z0 decays, recorded during the 1991 LEP run with the silicon vertex detector fully operational, a fit to the impact parameter distribution of lepton tracks coming from semileptonic decays yields an average b hadron lifetime of 1.49 +/- 0.03 +/- 0.06 ps.

引用

页码：174 / 186

页数：13

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