ar X iv : 0 70 6 . 21 63 v 2 [ he p - ph ] 1 8 Ju n 20 07 EFI 07 - 16 Predictions for masses of Ξ b baryons

ar X iv : h ep - p h / 96 06 34 3 v 1 1 6 Ju n 19 96 TECHNION - PH - 96 - 8 Weak Radiative Decays of Beauty Baryons Paul

Weak radiative decays of beauty baryons into strange baryons, induced by the elec-troweak penguin, are estimated by using a quark model approach. Relations between formfactors in the semileptonic and in the weak radiative decays are derived within the heavy quark effective theory. The partial decay widths are found to be of the order of 10 −15 MeV for Λ b → Λγ and Ξ b → Ξγ and of the oder of 10...

ar X iv : h ep - l at / 0 30 70 25 v 1 1 6 Ju l 2 00 3 SHEP - 0319 Spectroscopy of Doubly - Charmed Baryons in Lattice QCD UKQCD Collaboration

We present results for masses of spin-1/2 and spin-3/2 double-charm baryons in quenched lattice QCD, from an exploratory study using a non-perturbatively improved clover action at β = 6.2. We have studied local operators and we observe, after appropriate projections, a good signal for the ground states. We also present results for single-charmed baryons and spin-splittings for both double-and s...

ar X iv : 0 70 6 . 21 91 v 1 [ he p - ph ] 1 4 Ju n 20 07 Phases of Cold , Dense Quarks at Large N c

We consider QCD at nonzero temperature and quark density in the limit of a large number of colors, Nc. We suggest that several distinct phases can arise. Two are familiar: a cold phase of confined hadrons, with a pressure ∼ N c , and hot phase of deconfined gluons, with pressure ∼ N c . For cold, dense quarks, in a narrow (∼ 1/N c ) window for the quark chemical potential, μ, there is first a d...

ar X iv : 0 80 1 . 48 21 v 2 [ he p - ph ] 2 8 Fe b 20 08 X ( 1835 ) and η ( 1760 ) observed by BES Collaboration

ar X iv : 0 70 6 . 21 91 v 2 [ he p - ph ] 1 6 Ju l 2 00 7 Phases of Dense Quarks at Large N c

In the limit of a large number of colors, Nc, we suggest that gauge theories can exhibit several distinct phases at nonzero temperature and quark density. Two are familiar: a cold, dilute phase of confined hadrons, where the pressure is ∼ 1, and a hot phase of deconfined quarks and gluons, with pressure ∼ N c . When the quark chemical potential μ ∼ 1, the deconfining transition temperature, Td,...