Asymmetry in the nonmesonic weak decay of polarized Λ5He hypernuclei

被引：50

作者：

Ajimura, S ^{[1
]}

Ikeda, K

Ishikawa, M

Kishimoto, T

Okusu, A

Shinkai, N

Tanaka, Y

Ejiri, H

Nakano, T

Manabe, K

Nagae, T

Noumi, H

Sekimoto, M

Shibata, T

Hashimoto, O

Maeda, K

Takahashi, T

Hasegawa, T

Bhang, H

Kim, YD

Park, H

Youn, M

机构：

[1] Osaka Univ, Dept Phys, Toyonaka, Osaka 5600045, Japan

[2] Osaka Univ, Nucl Phys Res Ctr, Suita, Osaka 5640047, Japan

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

[4] Tohoku Univ, Dept Phys, Sendai, Miyagi 9808578, Japan

[5] Kitazato Univ, Sch Hyg Sci, Sagamihara, Kanagawa 2288555, Japan

[6] Seoul Natl Univ, Dept Phys, Seoul 151742, South Korea

来源：

PHYSICAL REVIEW LETTERS | 2000年 / 84卷 / 18期

关键词：

D O I：

10.1103/PhysRevLett.84.4052

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We have measured the asymmetric emission of protons from the nonmesonic decay of polarized (5)(Lambda) He produced by the (pi(+),K+) reaction. (5)(Lambda) He is an s-shell hypernucleus and its polarization is due to the Lambda. One expects to obtain direct information on the elementary weak lip <(Lambda)over right arrow>p --> np process. The asymmetry parameter has been determined to be 0.24 +/- 0.22. The implication of the result is discussed.

引用

页码：4052 / 4055

页数：4

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