Holographic Principle bounds on Primordial Black Hole abundances

The generalized Second Law of thermodynamics and the Holographic Principle are combined to obtain the maximum mass of black holes formed inside a static spherical box of size $R$ filled with radiation at initial temperature $T_{i}$. The final temperature after the formation of black holes is evaluated, and we show that a critical threshold exists for the radiation to be fully consumed by the process. We next argue that if some form of Holographic Principle holds, upper bounds to the mass density of PBHs formed in the early universe may be obtained. The limits are worked out for inflationary and non-inflationary cosmological models. This method is independent of the known limits based on the background fluxes (from cosmic rays, radiation and other forms of energy) and applies to potentially important epochs of PBH formation, resulting in quite strong constraints to $\Omega_{pbh}$.Comment: Latex file, 2 .ps figures. To appear in Classical and Quantum Gravit

Measurement of the inclusive jet cross section in pp collisions at √s=2.76 TeV

The double-differential inclusive jet cross section is measured as a function of jet transverse momentum pT and absolute rapidity IyI, using proton-proton collision data collected with the CMS experiment at the LHC, at a center-of-mass energy of √s=2.76 TeV and corresponding to an integrated luminosity of 5.43 pb⁻¹. Jets are reconstructed within the pT range of 74 to 592 GeV and the rapidity range IyI < 3.0.The reconstructed jet spectrum is corrected for detector resolution. The measurements are compared to the theoretical prediction at next-to-leading-order QCD using different sets of parton distribution functions. This inclusive cross section measurement explores a new kinematic region and is consistent with QCD predictions