Studies on the K*Σ bound-state via K+p → K+φp

被引：3
|
作者：
Nam, Seung-il [1 ,2 ,3 ]
机构：
[1] Pukyong Natl Univ PKNU, Dept Phys, Busan 48513, South Korea
[2] Korea Univ, Ctr Extreme Nucl Matters CENuM, Seoul 02841, South Korea
[3] Asia Pacific Ctr Theoret Phys APCTP, Pohang 37673, South Korea
来源：
PHYSICAL REVIEW D | 2021年 / 103卷 / 05期
关键词：
PHOTOPRODUCTION; HYPERON; BARYON;
D O I：
10.1103/PhysRevD.103.054040
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
In the present work, we investigate the hidden-strangeness production process in the S = +1 channel via K(+)p -> K+phi p, focusing on the exotic pentaquark molecular K*Sigma bound-state, assigned by P-s(+) (2071, 3/2(-)). For this purpose, we employ the effective Lagrangian approach in the tree-level Born approximation. Using the experimental and theoretical inputs for the exotic state and for the ground-state hadron interactions, the numerical results show a small but obvious peak structure from P-s(+) with the signalto-background ratio approximate to 1.7%, and it is enhanced in the backward-scattering region of the outgoing K+ in the center-of-mass frame. We also find that the contribution from the K*(1680,1(-)) meson plays an important role to reproduce the data. The proton-spin polarizations are taken into account to find a way to reduce the background. The effects of the possible 27-plet pentaquark Theta(++)(27) is discussed as well.
引用
收藏
页数：9
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