Measurement of structure-dependent K+ → μ+νμγ decay

被引：33

作者：

Adler, S ^{[1
]}

Atiya, MS

Chiang, IH

Diwan, MV

Frank, JS

Haggerty, JS

Kettell, SH

Kycia, TF

Li, KK

Littenberg, LS

Sambamurti, A

Stevens, A

Strand, RC

Witzig, C

Komatsubara, TK

Kuriki, M

Muramatsu, N

Sugimoto, S

Inagaki, T

Kabe, S

Kobayashi, M

Kuno, Y

Sato, T

Shinkawa, T

Yoshimura, Y

Kishi, Y

Nakano, T

Ardebili, M

Convery, MR

Ito, MM

Marlow, DR

McPherson, RA

Meyers, PD

Shoemaker, FC

Smith, AJS

Stone, JR

Aoki, M

Blackmore, EW

Bergbusch, PC

Bryman, DA

Konaka, A

Macdonald, JA

Mildenberger, J

Numao, T

Padley, P

Poutissou, JM

Poutissou, R

Redlinger, G

Kitching, P

Soluk, R

机构：

[1] Brookhaven Natl Lab, Upton, NY 11973 USA

[2] KEK, High Energy Acccelerator Res Org, Tanashi, Tokyo 1888501, Japan

[3] KEK, High Energy Accelerator Res Org, Tsukuba, Ibaraki 3050801, Japan

[4] Osaka Univ, RCNP, Ibaraki, Osaka 5670047, Japan

[5] Princeton Univ, Joseph Henry Labs, Princeton, NJ 08544 USA

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

[7] Univ Alberta, Ctr Subatom Res, Edmonton, AB T6G 2N5, Canada

[8] Univ British Columbia, Dept Phys & Astron, Vancouver, BC V6T 1Z1, Canada

来源：

PHYSICAL REVIEW LETTERS | 2000年 / 85卷 / 11期

关键词：

D O I：

10.1103/PhysRevLett.85.2256

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report the first measurement of a structure-dependent component in the decay K+ --> mu(+)nu(mu)gamma. Using the kinematic region where the muon kinetic energy is greater than 137 MeV and the photon energy is greater than 90 MeV, we find that the absolute value of the sum of the vector and axial-vector form factors is [F-V + F-A] = 0.165 +/- 0.007 +/- 0.011. This corresponds to a branching ratio of B(SD+) = (1.33 +/- 0.12 +/- 0.18) x 10(-5). We also set the limit -0.04 ( F-V - F-A < 0.24 at 90% C.L.

引用

页码：2256 / 2259

页数：4

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