Measurement of direct photon emission in K+ → π+π0γ decay

被引：20

作者：

Adler, S ^{[1
]}

Aoki, M

Ardebili, M

Atiya, MS

Bergbusch, PC

Blackmore, EW

Bryman, DA

Chiang, IH

Convery, MR

Diwan, MV

Frank, JS

Haggerty, JS

Inagaki, T

Ito, MM

Kabe, S

Kettell, SH

Kishi, Y

Kitching, P

Kobayashi, M

Komatsubara, TK

Konaka, A

Kuno, Y

Kuriki, M

Kycia, TF

Li, KK

Littenberg, LS

Macdonald, JA

McPherson, RA

Meyers, PD

Mildenberger, J

Muramatsu, N

Nakano, T

Numao, T

Poutissou, JM

Poutissou, R

Redlinger, G

Sato, T

Shinkawa, T

Shoemaker, FC

Soluk, R

Stone, JR

Strand, RC

Sugimoto, S

Witzig, C

Yoshimura, Y

机构：

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

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

[3] Osaka Univ, RCNP, Osaka 5670047, Japan

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

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

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

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

来源：

PHYSICAL REVIEW LETTERS | 2000年 / 85卷 / 23期

关键词：

D O I：

10.1103/PhysRevLett.85.4856

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We have performed a measurement of the K+ --> pi (+)pi (0)gamma decay and have observed 2 X 10(4) events. The best fit to the decay spectrum gives a branching ratio for direct photon emission of (4.7 +/- 0.8 +/- 0.3) X 10(-6) in the pi (+) kinetic energy region of 55 to 90 MeV and requires no component due to interference with inner bremsstrahlung.

引用

页码：4856 / 4859

页数：4

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