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17 papers · 1 filter
Heavy-Flavour Pentaquarks in a Chiral Constituent Quark Model
M. Genovese, J. -M. Richard, FL. Stancu +1
Within the chiral constituent quark model of Glozman and Riska, we discuss the stability of heavy pentaquarks, i.e. hadrons containing four light quarks and a heavy antiquark. The…
Two photons decay of the glueball and scalar isoscalar mesons in a scaled NJL model
M. Jaminon, B. Van den Bossche
We use a modified version of the Nambu--Jona-Lasinio model which implements the QCD trace anomaly to calculate the two photons decay width of the glueball (f_0(1500)) and of the tw…
Soft Pomeron Intercept
J. R. Cudell, K. Kang, S. K. Kim
We show that simple Regge pole fits to the imaginary and the real part of the elastic amplitude in pp and pbar p collisions give a value of 1.096+0.012-0.009 for the pomeron interc…
Variational and conformal structure of nonlinear metric-connection gravitational lagrangians
S. Cotsakis, J. Miritzis, L. Querella
We examine the variational and conformal structures of higher order theories of gravity which are derived from a metric-connection Lagrangian that is an arbitrary function of the c…
Heavy hexaquarks in a chiral constituent quark model
S. Pepin, Fl. Stancu
We discuss the stability of hexaquark systems of type uuddsQ (Q=c or b) within a chiral constituent quark model which successfully describes the baryon spectra including the charme…
Sandpile Model for Relaxation in Complex Systems
A. Vazquez, O. Sotolongo-Costa, F. Brouers
The relaxation in complex systems is in general nonexponential. After an initial rapid decay the system relax slowly following a long time tail. In the present paper a sandpile mod…