Strong decays of heavy baryons in Bethe-Salpeter formalism

Details Strong decays of heavy baryons in Bethe-Salpeter formalism Strong decays of heavy baryons in Bethe-Salpeter formalism

2007-10-08

arxiv.org/abs/0710.1474v3

Phys.Rev.D77:036003,2008

Physics

High Energy Physics

High Energy Physics - Phenomenology

41 pages, 1 figure, LaTex2e, typos corrected

Scientific paper

10.1103/PhysRevD.77.036003

In this paper we study the properties of diquarks (composed of $u$ and/or $d$ quarks) in the Bethe-Salpeter formalism under the covariant instantaneous approximation. We calculate their BS wave functions and study their effective interaction with the pion. Using the effective coupling constant among the diquarks and the pion, in the heavy quark limit $m_Q\to\infty$, we calculate the decay widths of $\Sigma_Q^{(*)}$ ($Q=c,b$) in the BS formalism under the covariant instantaneous approximation and then give predictions of the decay widths $\Gamma(\Sigma_b^{(*)}\to\Lambda_b+\pi)$.

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