6533b86efe1ef96bd12cc562

RESEARCH PRODUCT

Study of the strong Sigma(c)->Lambda(c)pi,Sigma(*)(c)->Lambda(c)pi and Xi(*)(c)->Xi(c)pi decays in a nonrelativistic quark model

Conrado AlbertusEliecer Hernández GajateJuan Miguel Nieves PamplonaJosé María Verde Velasco

subject

FísicaHigh Energy Physics::ExperimentAstrophysics::Cosmology and Extragalactic AstrophysicsAstrophysics::Earth and Planetary Astrophysics

description

We present results for the strong widths corresponding to the Sigma(c)->Lambda(c)pi, Sigma(c)(*)->Lambda(c)pi and Xi(c)(*)->Xi(c)pi decays. The calculations have been done in a nonrelativistic constituent quark model with wave functions that take advantage of the constraints imposed by heavy quark symmetry. Partial conservation of axial current hypothesis allows us to determine the strong vertices from an analysis of the axial current matrix elements. Our results Gamma(Sigma(c)(++)->Lambda(c)(+)pi(+))=2.41 +/- 0.07 +/- 0.02 MeV, Gamma(Sigma(c)(+)->Lambda(c)(+)pi(0))=2.79 +/- 0.08 +/- 0.02 MeV, Gamma(Sigma(c)(0)->Lambda(c)(+)pi(-))=2.37 +/- 0.07 +/- 0.02 MeV, Gamma(Sigma(c)(*++)->Lambda(c)(+)pi(+))=17.52 +/- 0.74 +/- 0.12 MeV, Gamma(Sigma(c)(*+)->Lambda(c)(+)pi(0))=17.31 +/- 0.73 +/- 0.12 MeV, Gamma(Sigma(c)(*0)->Lambda(c)(+)pi(-))=16.90 +/- 0.71 +/- 0.12 MeV, Gamma(Xi(c)(*+)->Xi(c)(0)pi(+)+Xi(c)(+)pi(0))=3.18 +/- 0.10 +/- 0.01 MeV, and Gamma(Xi(c)(*0)->Xi(c)(+)pi(-)+Xi(c)(0)pi(0))=3.03 +/- 0.10 +/- 0.01 MeV are in good agreement with experimental determinations.

yearjournalcountryeditionlanguage
2005-01-01
10.1103/physrevd.72.094022http://hdl.handle.net/10550/39261