Measurement of the branching ratio for Ds-→τ-(ν)over-barτ decays

被引：22

作者：

Abbiendi, G ^{[1
]}

Ainsley, C

Åkesson, PF

Alexander, G

Allison, J

Anagnostou, G

Anderson, KJ

Arcelli, S

Asai, S

Axen, D

Azuelos, G

Bailey, I

Ball, AH

Barberio, E

Barlow, RJ

Batley, RJ

Behnke, T

Bell, KW

Bella, G

Bellerive, A

Benelli, G

Bethke, S

Biebel, O

Bloodworth, IJ

Boeriu, O

Bock, P

Böhme, J

Bonacorsi, D

Boutemeur, M

Braibant, S

Brigliadori, L

Brown, RM

Burckhart, HJ

Cammin, J

Capiluppi, P

Carnegie, RK

Caron, B

Carter, AA

Carter, JR

Chang, CY

Charlton, DG

Clarke, PEL

Clay, E

Cohen, I

Couchman, J

Csilling, A

Cuffiani, M

Dado, S

Dallavalle, GM

Dallison, S

机构：

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

[2] Ist Nazl Fis Nucl, I-40126 Bologna, Italy

[3] Tel Aviv Univ, Sch Phys & Astron, IL-69978 Tel Aviv, Israel

[4] CERN, Div EP, CH-1211 Geneva 23, Switzerland

[5] Univ Calif Riverside, High Energy Phys, Riverside, CA 92521 USA

[6] Res Inst Particle & Nucl Phys, Budapest, Hungary

[7] Max Planck Inst, Munich, Germany

[8] Univ Debrecen, Dept Expt Phys, Debrecen, Hungary

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

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

[11] Yale Univ, Dept Phys, New Haven, CT 06520 USA

[12] Max Planck Inst Phys & Astrophys, D-80805 Munich, Germany

[13] Univ Munich, Sekt Phys, D-85748 Garching, Germany

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

[15] Res Inst Particle & Nucl Phys, H-15125 Budapest, Hungary

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

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

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

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

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

[21] Kobe Univ, Kobe, Hyogo 6578501, Japan

[22] Univ Tokyo, Dept Phys, Tokyo 1130033, Japan

[23] Univ Tokyo, Int Ctr Elementary Particle Phys, Tokyo 1130033, Japan

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

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

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

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

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

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

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

[31] UCL, London WC1E 6BT, England

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

[33] Queen Mary Univ London, London E1 4NS, England

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

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

[36] Univ Freiburg, Fak Phys, D-79104 Freiburg, Germany

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

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

[39] CERN, European Org Nucl Res, CH-1211 Geneva 23, Switzerland

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

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

[42] Cavendish Lab, Cambridge CB3 0HE, England

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

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

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

[46] Ist Nazl Fis Nucl, I-40126 Bologna, Italy

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

来源：

PHYSICS LETTERS B | 2001年 / 516卷 / 3-4期

基金：

以色列科学基金会; 加拿大自然科学与工程研究理事会;

关键词：

D O I：

10.1016/S0370-2693(01)00936-4

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Using about 3.9 million hadronic Z decays from e(+)e(-) collisions recorded by the OPAL detector at LEP at centre-of-mass energies,roots approximate to M-Z, the branching ratio for the decay D-s(-)--> tau (-)(v) over bar (tau) has been measured to be BR(D-s(-) --> tau (-)(v)over bar>) = (7.0 +/- 2.1(stat) +/- 2.0(syst))%. This result can be used to derive the decay constant of the D-s(-) meson: f(Ds) = (286 +/- 44(stat) +/- 41 (syst)) MeV. (C) 2001 Elsevier Science B.V. All rights reserved.

引用

页码：236 / 248

页数：13

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