Measurement of the absolute branching ratio for the K+→μ + v(γ) decay with the KLOE detector

被引：57

作者：

Ambrosino, F

Antonelli, A

Antonelli, M

Bacci, C

Beltrame, P

Bencivenni, G

Bertolucci, S

Bini, C

Bloise, C

Bocci, V

Bossi, F

Bowring, D

Branchini, P

Caloi, R

Campana, P

Capon, G

Capussela, T

Ceradini, F

Chi, S

Chiefari, G

Ciambrone, P

Conetti, S

De Lucia, E

De Simone, P

De Zorzi, G

Dell'Agnello, S

Denig, A

Di Domenico, A

Di Donato, C

Di Falco, S

Di Micco, B

Doria, A

Dreucci, M

Felici, G

Ferrari, A

Ferrer, ML

Finocchiaro, G

Forti, C

Franzini, P

Gatti, C

Gauzzi, P

Giovannella, S

Gorini, E

Graziani, E

Incagli, M

Kluge, W

Kulikov, V

Lacava, F

Lanfranchi, G

Lee-Franzini, J

机构：

[1] Ist Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, Italy

[2] Univ Karlsruhe, Inst Expt Phys, Karlsruhe, Germany

[3] Univ Lecce, Dipartimento Fis, I-73100 Lecce, Italy

[4] Ist Nazl Fis Nucl, I-73100 Lecce, Italy

[5] Univ Naples Federico II, Dipartimento Sci Fisiche, Naples, Italy

[6] Ist Nazl Fis Nucl, I-80125 Naples, Italy

[7] Univ Roma La Sapienza, Dipartimento Energet, Rome, Italy

[8] Univ Roma La Sapienza, Dipartimento Fis, Rome, Italy

[9] Ist Nazl Fis Nucl, Rome, Italy

[10] Univ Roma Tor Vergata, Dipartimento Fis, Rome, Italy

[11] Univ Roma Tre, Dipartimento Fis, Rome, Italy

[12] SUNY Stony Brook, Dept Phys, Stony Brook, NY 11794 USA

[13] Univ Virginia, Dept Phys, Charlottesville, VA 22903 USA

来源：

PHYSICS LETTERS B | 2006年 / 632卷 / 01期

关键词：

D O I：

10.1016/j.physletb.2005.11.008

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We have measured the fully inclusive K+ -> mu(+)v(y) absolute branching ratio with the KLOE experiment at DM phi NE, the Frascati phi-factory. From some 865283 K+ -> mu(+)v(gamma) decays obtained from a sample of similar to 5.2 x 10(8), phi-meson decays, we find BR(K+ -> mu+v(mu),(gamma)) = 0.6366 +/- 0.0009(stat.) +/- 0.0015(syst)., corresponding to an overall fractional error of 0.27%. Using recent lattice results on the decay constants of pseudoscalar mesons one can obtain an estimate for the CKM mixing matrix element vertical bar V(us)vertical bar = 0.2223 +/- 0.0026. (c) 2005 Elsevier B.V. All rights reserved.

引用

页码：76 / 80

页数：5

共 13 条

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