K anti-K N molecule state with I=1/2 and J^P=1/2^+ studied with three-body calculation

Details K anti-K N molecule state with I=1/2 and J^P=1/2^+ studied with three-body calculation K anti-K N molecule state with I=1/2 and J^P=1/2^+ studied with three-body calculation

2008-06-23

arxiv.org/abs/0806.3601v1

Phys.Rev.C78:035203,2008

Physics

Nuclear Physics

Nuclear Theory

8 pages, 3 figures, 3 tables. use revtex

Scientific paper

10.1103/PhysRevC.78.035203

A K \bar{K} N system with I=1/2 and J^P=1/2^+ is investigated with non-relativistic three-body calculations by using effective \bar K N, K \bar K and KN interactions. The \bar K N interaction describes the Lambda(1405) as a \bar K N molecule, and the K\bar K interaction is adjusted to give f_0(980) and a_0(980) states as K \bar K molecules. The present investigation suggests that a bound K \bar K N state can be formed below the K \bar K N threshold (1930 MeV) with a 90 ~ 100 MeV width of three-hadron decays, which are dominated by K bar K N -> K pi Sigma and pi eta N. It is found that the K \bar K N state is a weakly bound hadron molecular state with a size larger than an alpha particle because of the repulsive KN interactions.

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