6,664 research outputs found
Impact of the inelastic proton -- nucleus cross section on the prompt neutrino flux
The description of the inelastic proton -- nucleus cross section at very high
energies is still an open question. The current theoretical uncertainty has
direct impact on the predictions of the cosmic ray and neutrino physics
observables. In this paper we consider different models for the treatment of
, compare its predictions at ultrahigh cosmic ray energies
and estimate the prompt neutrino flux at the neutrino energies that have been
probed by the IceCube Observatory. We demonstrate that depending of the model
used to describe , the predictions for the prompt neutrino
flux can differ by a factor of order of three. Such result demonstrate the
importance of a precise measurement of the inelastic proton -- nucleus cross
section at high energies.Comment: 5 pages, 3 figures; v2: corrected the range of horizontal axis in
figure 1. Matches the version published in Eur. Phys. J.
The QCD Pomeron in Ultraperipheral Heavy Ion Collisions: IV. Photonuclear Production of Vector Mesons
The photonuclear production of vector mesons in ultraperipheral heavy ion
collisions is investigated within the QCD color dipole picture, with particular
emphasis on the saturation model. The integrated cross section and the rapidity
distribution for the A + A --> V + A + A (V = rho, omega, phi, J/Psi) process
are computed and theoretical estimates for scattering on both light and heavy
nuclei are given for energies of RHIC and LHC. A comparison with the recent
STAR data on coherent production of rho mesons is also presented. Furthermore,
we calculate the photoproduction of vector mesons in proton-proton collisions
at RHIC, Tevatron and LHC energies.Comment: 19 pages, 6 figures and 2 tables. Version to be published in Eur.
Phys. J.
Nuclear Heavy Quark Photoproduction in a Saturation Model
We calculate the nuclear inclusive and diffractive cross sections for heavy
quark photoproduction within a phenomenological saturation approach. The
nuclear cross section is obtained by the extension of the saturation model
through Glauber-Gribov formalism. We predict large nuclear heavy quark cross
section at LHC energies.Comment: 14 pages, 6 figures. Version to be published in Eur. Phys. J.
Coherent photon-hadron interactions in pA collisions: Small-x physics after HERA
In this letter we study the photoproduction of heavy quarks and vector mesons
in the coherent proton-nucleus (pA) interactions for RHIC and LHC energies and
analyze if these processes can be used to determine the QCD dynamics at high
energies. The integrated cross section and rapidity distribution are estimated
using the Color Glass Condensate (CGC) formalism. A comparison with the linear
dynamics predictions is also presented. Our results indicate that the nonlinear
dynamics can be proven in those reactions, which are well suited for studing
saturation effects.Comment: 5 pages, 3 figures. Version to be published in Physical Review
- …