Production of N*(1535) and N*(1650) in Λc→ (K)over-bar0ηp (πN) decay

被引：9
|
作者：
Pavao, R. [1 ]
Sakai, S.
Oset, E.
机构：
[1] Ctr Mixto Univ Valencia, CSIC Inst Invest Paterna, Dept Fis Teor, Valencia 46071, Spain
来源：
PHYSICAL REVIEW C | 2018年 / 98卷 / 01期
关键词：
CHIRAL DYNAMICS; NUCLEON; LAMBDA(1405); MODELS; STATES;
D O I：
10.1103/PhysRevC.98.015201
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：
To study the properties of the N*(1535) and N*(1650), we calculate the mass distributions of MB in the Lambda(c) -> (K) over bar (MB)-M-0 decay, with MB = pi N(I = 1/2), eta p, and K Sigma(I = 1/2). We do this by calculating the tree-level and loop contributions, mixing pseudoscalar-baryon and vector-baryon channels using the local hidden gauge formalism. The loop contributions for each channel are calculated using the chiral unitary approach. We observe that for the eta N mass distribution only the N* (1535) is seen, with the N* (1650) contributing to the width of the curve, but for the pi N mass distribution both resonances are clearly visible. In the case of MB = K Sigma, we found that the strength of the K E mass distribution is smaller than that of the mass distributions of the pi N and eta p in the Lambda(+)(c)-> (K) over bar (0)pi N and Lambda(+)(c) -> (K) over bar (0)eta p processes, in spite of this channel having a large coupling to the N* (1650). This is because the K Sigma pair production is suppressed in the primary production from the Lambda(c) decay.
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页数：8
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