Measurement of the Ds → μνμ branching fraction and of the Ds decay constant

被引：25

作者：

Alexandrov, Y

Angelini, C

Barberis, D

Ceradini, F

Dameri, M

Darbo, G

Duane, A

Flaminio, V

French, BR

Gemme, C

Harrison, K

Hurst, R

Lazzeroni, C

Malferrari, L

Martellotti, G

Mazzanti, P

Netchaeva, P

Orestano, D

Osculati, B

Penso, G

Rossi, L

Rotscheidt, H

Websdale, D

Zavertyaev, M

机构：

[1] PN Lebedev Phys Inst, Moscow 117924, Russia

[2] Univ Bologna, Bologna, Italy

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

[4] CERN, Geneva, Switzerland

[5] Univ Genoa, Genoa, Italy

[6] Ist Nazl Fis Nucl, I-16146 Genoa, Italy

[7] Univ London Imperial Coll Sci Technol & Med, Blackett Lab, London, England

[8] Univ Pisa, Pisa, Italy

[9] Ist Nazl Fis Nucl, Pisa, Italy

[10] Univ Roma La Sapienza, Rome, Italy

[11] Ist Nazl Fis Nucl, Rome, Italy

[12] Univ Roma Tre, Rome, Italy

来源：

PHYSICS LETTERS B | 2000年 / 478卷 / 1-3期

关键词：

D O I：

10.1016/S0370-2693(00)00266-5

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Using interactions of 350 GeV/c pi(-) in copper and tungsten targets, the branching fraction for the leptonic decay B(D-s --> mu v(mu)) is measured to he (0.83 +/- 0.23(stat.)+/- 0.06 +/- 0.18(B(Ds --> phi pi)))%. The resulting value for the D-s decay constant is f(D,) = 323 +/- 44 +/- 12 +/- 34. (C) 2000 Elsevier Science B.V. All rights reserved.

引用

页码：31 / 38

页数：8

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