Coupling constant for Lambda(1405)(K)over-bar N

	Coupling constant for Lambda(1405)(K)over-bar N
	Xie, JJ; Liu, BC; An CS(安春生); An, CS
刊名	PHYSICAL REVIEW C
	2013
卷号	88 期号:1 页码:15203
英文摘要	The value of the Lambda(1405)(K) over bar N coupling constant g(Lambda(1405)(K) over bar) (N) is obtained by fitting it to the experimental data on the total cross sections of the K- p -> pi(0)Sigma(0) reaction. On the basis of an effective Lagrangian approach and isobar model, we show that the value vertical bar g(Lambda(1405)(K) over bar) (N)vertical bar = 1.51 +/- 0.10 could be extracted from the available experimental data by assuming that the s-channel Lambda(1405) resonance plays a dominant role, whereas, the background contributions from the s-channel Lambda(1115), t-channel K*, and u-channel nucleon pole processes are small and can be neglected. However, the u-channel nucleon pole diagram may also give an important contribution in the present calculations. After the background contributions are taken into account, the above value of g(Lambda(1405)(K) over bar) (N) is reduced to vertical bar g(Lambda(1405)(K) over bar) (N)vertical bar = 0.77 +/- 0.07, which is not supported by the previous calculations and the recent CLAS measurements. The theoretical calculations on differential cross sections are also presented, which can be checked by future experiments.
学科主题	Physics
收录类别	SCI
WOS记录号	WOS:000321999100006
公开日期	2016-05-03
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/224499]
专题	中国科学院高能物理研究所
推荐引用方式 GB/T 7714	Xie, JJ,Liu, BC,An CS,et al. Coupling constant for Lambda(1405)(K)over-bar N[J]. PHYSICAL REVIEW C,2013,88(1):15203.
APA	Xie, JJ,Liu, BC,安春生,&An, CS.(2013).Coupling constant for Lambda(1405)(K)over-bar N.PHYSICAL REVIEW C,88(1),15203.
MLA	Xie, JJ,et al."Coupling constant for Lambda(1405)(K)over-bar N".PHYSICAL REVIEW C 88.1(2013):15203.