A Pentaquark Model of the Negative Parity Λ(1405)
نویسندگان
چکیده
We test a pentaquark model of the negative parity hyperon Λ(1405). We use the model where valence four quarks and one antiquark move in a potential relativisticaly and interact with themselves and each other through gluon and NG boson. We calculate mass shift of the system and find that there are two Λ(1405) with almost degenerate mass: one flavor singlet and one flavor octet. We calclate also σ-term and scalar form factor of the hyperon and show their usefulness to deduce the number of valence quark in the hypeon.
منابع مشابه
A Pentaquark Model for Λ(1405)
We study a pentaquark model of the negative parity hyperon Λ(1405). We choose a specific quark configuration for trial, and use the perturbative chiral quark model extended to four quarks and one anti-quark system. We calculate a σ-term and a scalar form factor of the hyperon and demonstrate their usefulness to study the nature of the hyperon.
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تاریخ انتشار 2007