The Shape and parameters of the Lambda (1405) resonance
The Shape and parameters of the Lambda (1405) resonance
复制标题
Lambda (1405) 共振的形状和参数
DOI：
10.1088/0954-3899/17/3/011
复制
发表时间：
1991
期刊：
影响因子：
--
通讯作者：
A. Deloff
中科院分区：
文献类型：
--
作者：
R. Dalitz;A. Deloff
利用M-矩阵、K-矩阵和（pi Sigma，KN）耦合通道中的可分离势，用一些唯象模型拟合了4.2Gev c ~（-1）下K-p → Sigma + pi-pi + pi +反应的实验pi - Sigma +质谱，使之达到K-p阈值。对λ（1405）质量的最佳估计是1406.5+或-4.0 MeV，全宽为50+或-2 MeV，尽管这些模型之间存在一些不一致，每个模型都给出了一个可接受的拟合这个光谱。
The experimental pi - Sigma + mass spectrum for the reaction K-p to Sigma + pi - pi + pi + at 4.2 Gev c-1 is fitted up to the K-p threshold by a number of phenomenological models, using the M-matrix, the K-matrix and separable potentials in the ( pi Sigma ,KN) coupled channels. The best estimate for the mass of Lambda (1405) is 1406.5+or-4.0 MeV, with a full width of 50+or-2 MeV, although there is some discordance between these models, each of which gives an acceptable fit to this spectrum.