Positive parity pentaquarks in a Goldstone boson exchange model

Details Positive parity pentaquarks in a Goldstone boson exchange model Positive parity pentaquarks in a Goldstone boson exchange model

1998-03-25

arxiv.org/abs/hep-ph/9803442v1

Phys.Rev.D58:111501,1998

Physics

High Energy Physics

High Energy Physics - Phenomenology

13 pages, RevTeX

Scientific paper

10.1103/PhysRevD.58.111501

We study the stability of the pentaquarks uuddQbar, uudsQbar and udssQbar (Q = c, b, or t) of positive parity in a constituent quark model based on Goldstone boson exchange interaction between quarks. The pentaquark parity is the antiquark parity times that of a quark excited to a p-shell. We show that the Goldstone boson exchange interaction favors these pentaquarks much more than the negative parity ones of the same flavour content but all quarks in the ground state. We find that the nonstrange pentaquarks are stable against strong decays.

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