11 research outputs found
Gluon distributions in nuclei probed at the CERN Large Hadron Collider
Using updated gluon distributions from global fits to data, we investigate
the sensitivity of direct photoproduction of heavy quarks and exclusive
production of vector mesons to varying strength of gluon modifications.
Implications of using these processes for constraining nuclear gluon
distributions are discussed.Comment: 10 pages, 8 figures; additional results, comments, and references;
accepted for publication in Physical Review
Constraining Gluon Shadowing Using Photoproduction in Ultraperipheral pA and AA Collisions
Photoproduction of heavy quarks and exclusive production of vector mesons in
ultraperipheral proton-nucleus and nucleus-nucleus collisions depend
significantly on nuclear gluon distributions. In the present study we
investigate quantitatively the extent of the applicability of these processes
at the Large Hadron Collider (LHC) in constraining the shadowing component of
nuclear gluon modifications.Comment: 15 pages, 10 figures. arXiv admin note: substantial text overlap with
arXiv:1104.428
Nuclear effects in photoproduction of heavy quarks and vector mesons in ultraperipheral PbPb and pPb collisions at the LHC
The comparison of photoproduction cross sections for and b-b(bar)
in PbPb and pPb collisions can give sensitivity to nuclear shadowing effects.
The photoproduction of vector mesons is even more sensitive to the underlying
gluon distributions. In this study we present the cross sections and rapidity
dependence of the photoproduction of heavy quarks and exclusive production of
vector mesons in ultraperipheral pPb and PbPb collisions at the Large Hadron
Collider at sqrt(s_NN)=5 TeV and sqrt(s_NN)=2.76J/\psi\Upsilon$ in
PbPb collisions in particular exhibit very good sensitivity to gluon shadowing.Comment: 4 pages, 4 figure