Aims. The cluster baryon fraction is estimated from the CMB-scattering leptonic component of the intracluster medium (ICM); however, the observed cluster baryon fraction is less than the cosmic one. Understanding the origin of this discrepancy is necessary for correctly describing the structure of the ICM. Methods. We estimate the baryonic mass in the outskirts of galaxy clusters which is diffi...

A new measurement of the Ξ mass verifies the accuracy of the ColemanGlashow relation at the level predicted by the 1/Nc expansion. Values for other baryon isospin mass splittings are updated, and continue to agree with the 1/Nc hierarchy. 11.15.Pg, 14.20.-c,13.40.Dk Typeset using REVTEX [email protected] [email protected] The recent measurement of the Ξ mass 1314.82± 0.06± 0.2 MeV by the NA48 coll...

The electroweak phase structure and baryon number violation for large Higgs mass. The classical transitions between topologically distinct vacua in a SU (2)–Higgs model, using a Higgs field of mass approximately 120 GeV, is examined to probe the crossover region between the symmetric and broken phase. For the volumes used, this crossover is approximately 10 GeV wide.

We investigate the phase diagram and the baryon mass (MB) in the color SU(Nc = 3) strong coupling lattice QCD with one species of staggered fermions at finite quark chemical potential (μ) and/or finite temperature (T ). In particular, their evolution with the finite coupling (1/g2) is studied in the next to leading order of the strong coupling expansion. We formulate the treatment of the tempor...

We analyze the baryon sideward and elliptic flow from SIS (0.25 ∼ 2 AGeV) to AGS (2 ∼11.0AGeV) energies for Au + Au collisions in the relativistic transport model RBUU that includes all baryon resonances up to a mass of 2 GeV as well as string degrees of freedom for the higher mass continuum. There are two factors which dominantly determine the baryon flow at these energies: the momentum depend...

It is shown that the principal pattern in baryon spectroscopy, which is associated with the flavor-spin hyperfine interactins, is due to the spontaneous breaking of chiral symmetry in QCD and persists in the chiral limit. All corrections , which are associated with a finite quark (Goldstone boson) mass are suppressed by the factor (µ/Λ χ) 2 and higher. In a recent work [1] Thomas and Krein ques...

In this paper we present an X-ray image deprojection analysis of EINSTEIN OBSERVATORY imaging data on 207 clusters of galaxies. The resulting radial profiles for luminosity, temperature , and electron density variations are determined from the cluster surface-brightness profiles according to gravitational potential constraints from average X-ray temperatures and optical velocity dispersions. Th...