41 research outputs found
Single- and double-scattering production of four muons in ultraperipheral PbPb collisions at the Large Hadron Collider
We discuss production of two pairs in ultraperipheral
ultrarelativistic heavy ion collisions at the LHC. We take into account
electromagnetic (two-photon) double-scattering production and for a first time
direct production of four muons in one scattering. We study the
unexplored process . We present
predictions for total and differential cross sections. Measurable nuclear cross
sections are obtained and corresponding differential distributions and counting
rates are presented.Comment: 13 pages, 11 figures, 1 tabl
Single inclusive jet production and the nuclear modification ratio at very forward rapidity in proton-lead collisions with = 5.02 TeV
We present calculations of single inclusive jet transverse momentum and
energy spectra at forward rapidity () in proton-lead
collisions with = 5.02 TeV. The predictions are obtained with
the KaTie Monte Carlo event generator, which allows to calculate interactions
within the High Energy Factorisation framework. The tree-level matrix element
results are subsequently interfaced with the CASCADE Monte Carlo event
generator to account for hadronisation. The effects of the saturation of the
gluon density, leading to suppression of the cross section, are investigated.Comment: 10 page
Hybrid -factorization and impact factors at NLO
In the hybrid kT -factorization formula, one initial-state parton momentum is space-like and carries non-vanishing transverse components, while the other is on-shell. We promote this factorization formula to next-to-leading order. Studying the partonic cross section, we identify all soft and collinear divergencies in the real and virtual contribution, and recognize that all non-cancelling ones can be attributed to PDF evolution, evolution kernel, and target impact factors. In result, we construct a framework that may be used to compute NLO impact factors in general. In particular, we recover known expressions for inclusive NLO quark-and gluon impact factor corrections