Study of (Λ)over-bar decay parameter in J/ψ → Λ(Λ)over-bar decay

被引：5
|
作者：
Zhong Bin [1 ,2 ,3 ]
Ping Rong-Gang [3 ]
Xiao Zhen-Jun [1 ,2 ]
机构：
[1] Nanjing Normal Univ, Dept Phys, Nanjing 210097, Peoples R China
[2] Nanjing Normal Univ, Inst Theoret Phys, Nanjing 210097, Peoples R China
[3] Chinese Acad Sci, Inst High Energy Phys, Beijing 100049, Peoples R China
来源：
CHINESE PHYSICS C | 2008年 / 32卷 / 09期
基金：
中国国家自然科学基金;
关键词：
parity asymmetry; hyperon nonleptonic decays; J/psi decays;
D O I：
10.1088/1674-1137/32/9/003
中图分类号：
O57 [原子核物理学、高能物理学];
学科分类号：
070202 ;
摘要：
The helicity amplitudes for J/psi -> Lambda(Lambda) over bar and the relevant background decays are presented for measuring the Lambda decay parameter alpha(+)((Lambda) over bar Lambda -> (p) over bar pi(+)) in J/psi -> Lambda(Lambda) over bar. The Monte Carlo (MC) simulations based on the helicity amplitudes information are carried out. The likelihood fit method to determine the (Lambda) over bar decay parameter is presented. Based on the MC generated sample, the sensitivity of the measurement for alpha(+) has been estimated, which shows that the J/psi Lambda(Lambda) over bar channel can be used to measure the (Lambda) over bar decay parameter alpha(+) ((Lambda) over bar -> (p) over bar pi(+)) well.
引用
收藏
页码：692 / 696
页数：5
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