HAL : in2p3-00713550, version 1
 arXiv : 1205.6856
 Physical Review D 86 (2012) 114501
 Strange and charm baryon masses with two flavors of dynamical twisted mass fermions
 (2012)
 The masses of the low-lying strange and charm baryons are evaluated using two degenerate flavors of twisted mass sea quarks for pion masses in the range of about 260 MeV to 450 MeV. The strange and charm valence quark masses are tuned to reproduce the mass of the kaon and D-meson at the physical point. The tree-level Symanzik improved gauge action is employed. We use three values of the lattice spacing, corresponding to $\beta=3.9$, $\beta=4.05$ and $\beta=4.2$ with $r_0/a=5.22(2)$, $r_0/a=6.61(3)$ and $r_0/a=8.31(5)$ respectively. %spacings $a=0.0855(5)$ and $a=0.0667(3)$ determined from the pion decay constant. We examine the dependence of the strange and charm baryons on the lattice spacing and strange and charm quark masses. The pion mass dependence is studied and physical results are obtained using heavy baryon chiral perturbation theory to extrapolate to the physical point.
 Thème(s) : Physique/Physique des Hautes Energies - RéseauPhysique/Physique des Hautes Energies - PhénoménologiePhysique/Physique Nucléaire Théorique
 Lien vers le texte intégral : http://fr.arXiv.org/abs/1205.6856
 in2p3-00713550, version 1 http://hal.in2p3.fr/in2p3-00713550 oai:hal.in2p3.fr:in2p3-00713550 Contributeur : Emmanuelle Vernay <> Soumis le : Lundi 2 Juillet 2012, 09:11:34 Dernière modification le : Mardi 4 Décembre 2012, 12:17:15