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12 papers · 2 filters
On the existence of exotic and non-exotic multiquark meson states
J. Vijande, E. Weissman, A. Valcarce +1
To obtain an exact solution of a four-body system containing two quarks and two antiquarks interacting through two-body terms is a cumbersome task that has been tackled with more o…
Quark-model hadron structure
A. Valcarce, J. Vijande, P. Gonzalez +1
We review some selected recent results on hadron spectroscopy and related theoretical studies based on constituent quark models.
B meson spectroscopy
J. Vijande, A. Valcarce, F. Fernandez
We study the meson spectroscopy allowing the mixture of conventional wave quark-antiquark states and four-quark components. A similar picture was used to describe the new $…
Are there compact heavy four-quark bound states?
J. Vijande, E. Weissman, A. Valcarce +1
We present an exact method to study four-quark systems based on the hyperspherical harmonics formalism. We apply it to several physical systems of interest containing two heavy and…
Neutrino induced threshold production of two pions and N^*(1440) electroweak form factors
E. Hernandez, J. Nieves, S. K. Singh +2
We study the threshold production of two pions induced by neutrinos in nucleon targets. The contribution of nucleon, pion and contact terms are calculated using a chiral Lagrangian…
Heavy quark symmetry constraints on semileptonic form factors and decay widths of doubly heavy baryons
E. Hernandez, J. Nieves, J. M. Verde-Velasco
We show how heavy quark symmetry constraints on doubly heavy baryon semileptonic decay widths can be used to test the validity of different quark model calculations. The large disc…