Low-energy reactionsK−p→Σ0π0,Λπ0

Abstract

Low energy reactions

Low energy reaction $K^-p\rightarrowΛη$ and the negative parity $Λ$ resonances

“…Obvious roles of the low-lying negative parity states, Λ(1405), Λ(1520) and Λ(1670), are found in the K − p → Σ 0 π 0 , K0 n reactions, where we have extracted their strong coupling properties. For example, we found that Λ(1670) should have a very weak coupling to KN, while Λ(1520) needs a strong coupling to KN, which can not be well explained with the symmetry constituent quark model in the S U(6) ⊗ O(3) limit [54].…”

“…This model has been well developed and widely applied to meson photoproduction reactions [56][57][58][59][60][61][62][63][64]. Its recent extension to describe the πN [65] and KN [40,54] reactions also turns out to be successful and inspiring.…”

“…Recently, we systematically studied the reactions K − p → Σ 0 π 0 , Λπ 0 , K0 n in a chiral quark model approach [54]. Obvious roles of the low-lying negative parity states, Λ(1405), Λ(1520) and Λ(1670), are found in the K − p → Σ 0 π 0 , K0 n reactions, where we have extracted their strong coupling properties.…”

Understanding the negative parity Λ resonances from the K−p → Λη reaction and their strong decays

“…1 Recently, we systematically studied the reactions K − p → Σ 0 π 0 , Λπ 0 ,K 0 n in a chiral quark model. 2 We found that Λ(1670) should have a very weak coupling toKN , while Λ(1520) needs a strong coupling toKN , which cannot be well explained with the symmetry constituent quark model in the SU(6)⊗O(3) limit. 2 To obtain more strong coupling properties and better understandings of these low-lying Λ states, we continue study another important reaction K − p → Λη.…”

K-p → Σ0π0, Λπ0, $\bar{K}^0n$, ηΛ reactions in a quark model

“…Recently, we systematically studied the reactions K − p → Σ 0 π 0 , Λπ 0 ,K 0 n in a chiral quark model approach. 6,7 Good descriptions of the experimental observations are obtained. The roles of the low-lying Λ and Σ hyperon resonances in these processes are carefully analyzed.…”