Measurements of the BS0 and Λb0 lifetimes

被引：48

作者：

Ackerstaff, K ^{[1
]}

Alexander, G

Allison, J

Altekamp, N

Anderson, KJ

Anderson, S

Arcelli, S

Asai, S

Ashby, SF

Axen, D

Azuelos, G

Ball, AH

Barberio, E

Barlow, RJ

Bartoldus, R

Batley, JR

Baumann, S

Bechtluft, J

Beeston, C

Behnke, T

Bell, AN

Bell, KW

Bella, G

Bentvelsen, S

Bethke, S

Betts, S

Biebel, O

Biguzzi, A

Bird, SD

Blobel, V

Bloodworth, IJ

Bloomer, JE

Bobinski, M

Bock, P

Bonacorsi, D

Boutemeur, M

Braibant, S

Brigliadori, L

Brown, RM

Burckhart, HJ

Burgard, C

Burgin, R

Capiluppi, P

Carnegie, RK

Carter, AA

Carter, JR

Chang, CY

Charlton, DG

Chrisman, D

Clarke, PEL

机构：

[1] CERN, European Org Particle Phys, CH-1211 Geneva 23, Switzerland

[2] TRIUMF, Vancouver, BC V6T 2A3, Canada

[3] Lajos Kossuth Univ, Dept Expt Phys, Debrecen, Hungary

[4] Inst Nucl Res, H-4001 Debrecen, Hungary

[5] NYU, Dept Phys, New York, NY 10003 USA

[6] Univ Birmingham, Sch Phys & Astron, Birmingham B15 2TT, W Midlands, England

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

[8] INFN, I-40126 Bologna, Italy

[9] Univ Bonn, Inst Phys, D-53115 Bonn, Germany

[10] Univ Calif Riverside, Dept Phys, Riverside, CA 92521 USA

[11] Univ Cambridge, Cavevdish Lab, Cambridge CB3 OHE, England

[12] Carleton Univ, Dept Phys, Ottawa Carleton Inst Phys, Ottawa, ON K1S 5B6, Canada

[13] Carleton Univ, Ctr Res Particle Phys, Ottawa, ON K1S 5B6, Canada

[14] Univ Chicago, Enrico Fermi Inst, Chicago, IL 60637 USA

[15] Univ Chicago, Dept Phys, Chicago, IL 60637 USA

[16] Albert Ludwigs Univ, Fak Phys, D-79104 Freiburg, Germany

[17] Univ Heidelberg, Inst Phys, D-69120 Heidelberg, Germany

[18] Indiana Univ, Dept Phys, Bloomington, IN 47405 USA

[19] Univ London Queen Mary & Westfield Coll, London E1 4NS, England

[20] Rhein Westfal TH Aachen, Inst Phys 3, D-52056 Aachen, Germany

[21] UCL, London WC1E 6BT, England

[22] Univ Manchester, Dept Phys, Schuster Lab, Manchester M13 9PL, Lancs, England

[23] Univ Maryland, Dept Phys, College Pk, MD 20742 USA

[24] Univ Montreal, Phys Nucl Lab, Montreal, PQ H3C 3J7, Canada

[25] Univ Oregon, Dept Phys, Eugene, OR 97403 USA

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

[27] Technion Israel Inst Technol, Dept Phys, IL-32000 Haifa, Israel

[28] Tel Aviv Univ, Dept Phys & Astron, IL-69978 Tel Aviv, Israel

[29] Univ Tokyo, Int Ctr Elementary Particle Phys, Tokyo 113, Japan

[30] Univ Tokyo, Dept Phys, Tokyo 113, Japan

[31] Kobe Univ, Kobe, Hyogo 657, Japan

[32] Brunel Univ, Uxbridge UB8 3PH, Middx, England

[33] Weizmann Inst Sci, Particle Phys Dept, IL-76100 Rehovot, Israel

[34] Univ Hamburg, DESY, Inst Expt Phys 2, D-22607 Hamburg, Germany

[35] Univ Victoria, Dept Phys, Victoria, BC V8W 3P6, Canada

[36] Univ British Columbia, Dept Phys, Vancouver, BC V6T 1Z1, Canada

[37] Univ Alberta, Dept Phys, Edmonton, AB T6G 2J1, Canada

[38] Duke Univ, Dept Phys, Durham, NC 27708 USA

[39] Hungarian Acad Sci, Res Inst Particle & Nucl Phys, H-1525 Budapest, Hungary

[40] Inst Nucl Res, H-4001 Debrecen, Hungary

[41] Ludwigs Maximillian Univ, Sekt Phys, D-85748 Garching, Germany

来源：

PHYSICS LETTERS B | 1998年 / 426卷 / 1-2期

关键词：

D O I：

10.1016/S0370-2693(98)00289-5

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

This paper presents updated measurements of the lifetimes of the B(s)(0) meson and the Lambda(b)(0) baryon using 4.4 million hadronic Z(0) decays recorded by the OPAL detector at LEP from 1990 to 1995. A sample of Bg decays is obtained using D(s)(-)l(+) combinations, where the D(s)(-) is fully reconstructed in the phi pi(-), K(*0)K(-) and K(-)K(S)(0) decay channels and partially reconstructed in the phi l(-)<(nu)over bar>X decay mode. A sample of Lambda(b)(0) decays is obtained using Lambda(c)(+)l(-) combinations, where the Lambda(c)(+)is fully reconstructed in its decay to a pK(-)pi(+) final state and partially reconstructed in the Lambda l(+)nu X decay channel, From 172 +/- 28 D(s)(-)l(+) combinations attributed to B(s)(0) decays, the measured lifetime is tau(B(s)(0))= 1.50(-0.15)(+0.16)+/- 0.04ps, where the errors are statistical and systematic, respectively. From the 129 +/- 25 Lambda(c)(+)l(-) combinations attributed to Lambda(b)(0) decays, the measured lifetime is tau(Lambda(b)(0))= 1.29(-0.22)(+0.24) +/- 0.06ps, where the erroers are statistical and systematic, respectively. (C) 1998 Published by Elsevier Science B.V. All rights reserved.

引用

页码：161 / 179

页数：19

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