MEASUREMENT OF THE B-S(0) LIFETIME

被引：16

作者：

ACTON, PD

AKERS, R

ALEXANDER, G

ALLISON, J

ANDERSON, KJ

ARCELLI, S

ASTBURY, A

AXEN, D

AZUELOS, G

BAINES, JTM

BALL, AH

BANKS, J

BARLOW, RJ

BARNETT, S

BARTOLDUS, R

BATLEY, JR

BEAUDOIN, G

BECK, A

BECK, GA

BECKER, J

BEESTON, C

BEHNKE, T

BELL, KW

BELLA, G

BENTKOWSKI, P

BERLICH, P

BETHKE, S

BIEBEL, O

BLOODWORTH, IJ

BOCK, P

BODEN, B

BOSCH, HM

BOUTEMEUR, M

BREUKER, H

BRIGHTTHOMAS, P

BROWN, RM

BUIJS, A

BURCKHART, HJ

BURGARD, C

CAPILUPPI, P

CARNEGIE, RK

CARTER, AA

CARTER, JR

CHANG, CY

CHARLTON, DG

CHU, SL

CLARKE, PEL

CLAYTON, JC

COHEN, I

CONBOY, JE

机构：

[1] UNIV BIRMINGHAM,SCH PHYS & SPACE RES,BIRMINGHAM B15 2TT,W MIDLANDS,ENGLAND

[2] INFN,I-40126 BOLOGNA,ITALY

[3] UNIV BOLOGNA,DIPARTIMENTO FIS,I-40126 BOLOGNA,ITALY

[4] UNIV BONN,INST PHYS,W-5300 BONN,GERMANY

[5] UNIV CALIF RIVERSIDE,DEPT PHYS,RIVERSIDE,CA 92521

[6] UNIV CAMBRIDGE,CAVENDISH LAB,CAMBRIDGE CB3 0HE,ENGLAND

[7] CARLETON UNIV,DEPT PHYS,OTTAWA K1S 5B6,ONTARIO,CANADA

[8] CARLETON UNIV,CTR RES PARTICLE PHYS,OTTAWA K1S 5B6,ONTARIO,CANADA

[9] CERN,EUROPEAN ORG PARTICLE PHYS,CH-1211 GENEVA 23,SWITZERLAND

[10] UNIV CHICAGO,ENRICO FERMI INST,CHICAGO,IL 60637

[11] UNIV CHICAGO,DEPT PHYS,CHICAGO,IL 60637

[12] UNIV FREIBURG,FAK PHYS,W-7800 FREIBURG,GERMANY

[13] UNIV HEIDELBERG,INST PHYS,W-6900 HEIDELBERG,GERMANY

[14] INDIANA UNIV,DEPT PHYS,BLOOMINGTON,IN 47405

[15] UNIV LONDON,QUEEN MARY & WESTFIELD COLL,LONDON E1 4NS,ENGLAND

[16] UNIV LONDON BIRKBECK COLL,LONDON WC1E 7HV,ENGLAND

[17] UNIV LONDON UNIV COLL,LONDON WC1E 6BT,ENGLAND

[18] UNIV MANCHESTER,DEPT PHYS,SCHUSTER LAB,MANCHESTER M13 9PL,LANCS,ENGLAND

[19] UNIV MARYLAND,DEPT PHYS,COLL PK,MD 20742

[20] UNIV MONTREAL,PHYS NUCL LAB,MONTREAL H3C 3J7,QUEBEC,CANADA

[21] UNIV OREGON,DEPT PHYS,EUGENE,OR 97403

[22] RUTHERFORD APPLETON LAB,DIDCOT OX11 0QX,OXON,ENGLAND

[23] SPP,DAPNIA,F-91191 GIF SUR YVETTE,FRANCE

[24] TECHNION ISRAEL INST TECHNOL,DEPT PHYS,IL-32000 HAIFA,ISRAEL

[25] TEL AVIV UNIV,DEPT PHYS & ASTRON,IL-69978 TEL AVIV,ISRAEL

[26] UNIV TOKYO,INT CTR ELEMENTARY PARTICLE PHYS,TOKYO 113,JAPAN

[27] UNIV TOKYO,DEPT PHYS,TOKYO 113,JAPAN

[28] KOBE UNIV,KOBE 657,JAPAN

[29] WEIZMANN INST SCI,IL-76100 REHOVOT,ISRAEL

[30] UNIV HAMBURG,DESY 2,INST EXPTL PHYS,W-2000 HAMBURG 52,GERMANY

[31] UNIV VICTORIA,DEPT PHYS,VICTORIA V8W 3P6,BC,CANADA

[32] UNIV BRITISH COLUMBIA,DEPT PHYS,VANCOUVER V6T 1Z1,BC,CANADA

[33] UNIV ALBERTA,DEPT PHYS,EDMONTON T6G 2N5,AB,CANADA

[34] DUKE UNIV,DEPT PHYS,DURHAM,NC 27708

来源：

PHYSICS LETTERS B | 1993年 / 312卷 / 04期

关键词：

D O I：

10.1016/0370-2693(93)90989-U

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The lifetime of the B(s)0 meson has been measured with the OPAL detector at LEP. A sample of B(s)0 (B(s)0BAR) decays has been obtained using D(s)- l+ (and charge conjugate, where l denotes a lepton) combinations, where the D(s)- was reconstructed in either the phipi- or K*0K- channel. The decay lengths of D(s)- l+ combinations were measured using vertex reconstruction. Proper decay times were obtained by combining these decay lengths with an estimate of the relativistic boost of the B(s)0 and were used in a maximum likelihood fit for the mean B(s)0 lifetime. From approximately 22 D(s)- l+ combinations attributed to B(s)0 decays (after background subtraction) in 1.26 million hadronic Z0 events recorded between 1990 and 1992, we have measured tau(B)s = 1.13(-0.26)+0.35(stat) +/- 0.09(sys) ps.

引用

页码：501 / 510

页数：10

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