The mass differences between the lightest vector and pseudoscalar mesons containing one or two heavy quarks are persistently smaller in quenched lattice simulations than the experimental values[1–3]. Studies of the unquenched theory have found that the discrepancy persists[4]. Fewer lattice simulations have been performed for the mass differences between spin-3/2 and spin-1/2 baryons containing...

We investigate the baryon fraction in dark matter haloes formed in non-radiative gasdynamical simulations of the ΛCDM cosmogony. By combining a realisation of the Millennium Simulation (Springel et al.) with a simulation of a smaller volume focussing on dwarf haloes, our study spans five decades in halo mass, from 10 h M⊙ to 10 h M⊙. We find that the baryon fraction within the halo virial radiu...

The Supersymmetric SO(10) GUT based on the 210⊕ 10⊕ 120⊕ 126⊕ 126 Higgs system and only spontaneous CP violation has 24 real superpotential parameters. It is compatible with all current low energy data and yet has enough freedom to accommodate the still unknown Leptonic CP violation and neutrino mass scale parameters. It is thus the New Minimal Supersymmetric Grand Unified Theory(NMSGUT). We co...

We evaluate the mass function of virialized halos, by using Press & Schechter (PS) and/or Steth & Tormen (ST) expressions, for cosmologies where Dark Energy (DE) is due to a scalar self– interacting field, coupled with Dark Matter (DM). We keep to coupled DE (cDE) models known to fit linear observables. To implement the PS–ST approach, we start from reviewing and extending the results of a prev...

We propose a Dirac-Born-Infeld ( DBI ) D5 vertex brane plus Nc fundamental strings configuration to describe a baryon probe in strongly coupled gauge theory with gluon condensation at finite temperature via AdS/CFT correspondence. We investigate properties of this configuration in a dilaton deformed AdS5×S background, in which IIB string theroy is dual to super Yang-Mills thery in a state with ...

One of the most efficient mechanisms for producing the baryon asymmetry of the Universe is the decay of scalar condensates in a SUSY GUT as was first suggested by Affleck and Dine. We show that given a large enough asymmetry, the baryon number will be preserved down to low temperatures even if B − L = 0, because the baryon number carrying scalars form bose condensates that give the W a mass. We...

While electromagnetic and up-down quark mass difference effects on octet baryon masses are very small, they have important consequences. The stability of the hydrogen atom against beta decay is a prominent example. Here, we include these effects by adding them to valence quarks in a lattice QCD calculation based on Nf=2+1 simulations with five lattice spacings down to 0.054 fm, lattice sizes up...

Motivated by the recent discovery of the exotic S = +1 narrow baryon resonance Θ+ at 1540 MeV, with quark content uud ds̄, we conjecture the existence of its anti-charmed analogue Θcwith quark content uuddc̄, and compute its likely properties. We rely on the recently constructed model of a novel kind of a pentaquark with an unusual color structure which provides a good approximation to the Θ+ mas...