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molecular state as a "
pentaquark" in a three-body calculation山縣 淳子*; 関原 隆泰
Physical Review C, 100(1), p.015203_1 - 015203_12, 2019/07
被引用回数：2 パーセンタイル：22.89(Physics, Nuclear)We predict a new three-body hadronic molecule composed of antikaon 
, anticharm meson 
, and nucleon 
with spin/parity 
= 1/2
and isospin 
= 1/2. This state behaves like an explicit pentaquark state because its minimal quark configuration is or 
. Owing to the attraction between every pair of two hadrons, in particular the 
attraction which dynamically generates 
and 
attraction which dynamically generates 
, the system is bound, and its eigenenergy is calculated as 3244-17
MeV in a nonrelativistic three-body potential model. We discuss properties of this quasibound state which emerge uniquely in three-body dynamics.
関原 隆泰; 兵藤 哲雄*; 慈道 大介*; 山縣(関原) 淳子*; 安井 繁宏*
Proceedings of Science (Internet), 281, p.289_1 - 289_8, 2017/05
In this contribution, I introduce the physical meaning of the compositeness, its expression, and theoretical evaluation in effective models. In particular, we show that the two-body wave function of the bound state corresponds to the residue of the scattering amplitude at the bound state pole, which means that solving the Lippmann-Schwinger equation at the bound state pole is equivalent to evaluating the two-body wave function of the bound state. Then, we evaluate the compositeness for the so-called dynamically generated resonances in the chiral unitary approach, such as , 
, and 
, and investigate their internal structure in terms of the hadronic molecular components.
