发布时间：2025-04-30

论文名称：Mass and K Lambda coupling of N*(1535)

发表刊物：Phys.Rev.Lett.

摘要：Using resonance isobar model and effective Lagrangian approach, from recent BES results on J/psi    oar ppeta and psi    oar pK^+Lambda, we deduce the ratio between effective coupling constants of N^*(1535) to KLambda and peta to be Requiv g_{N^*(1535)KLambda}/g_{N^*(1535)peta} =1.3pm 0.3. With previous known value of g_{N^*(1535)peta}, the obtained new value of g_{N^*(1535)KLambda} is shown to reproduce recent pp    o pK^+Lambda near-threshold cross section data as well. Taking into account this large N^*KLambda coupling in the coupled channel Breit-Wigner formula for the N^*(1535), its Berit-Wigner mass is found to be around 1400 MeV, much smaller than previous value of about 1535 MeV obtained without including its coupling to KLambda. The implication on the nature of N^*(1535) is discussed.

合写作者：B. C. Liu and B. S. Zou

卷号：96

页面范围：042002

是否译文：否

发表时间：2006-06-06