Constraining gluon shadowing using photoproduction in ultraperipheralpAandAAcollisions

Abstract

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.

Photoproduction ofJ/ψmesons in peripheral and semicentral heavy ion collisions

“…In last years there was also an interest in calculating cross sections for exclusive production of J/ψ mesons in ultrarelativistic heavy ion collisions [9][10][11][12][13][14]. The main reason for these investigations was a better understanding of interaction of a small size (cc) perturbative dipole with a nucleus or more explicitly with the nuclear gluons incorporated in different ways in different models.…”

Coherent photoproduction ofψandΥmesons in ultraperipheralpPb and PbPb collisions at the CERN Large Hadron Collider atAdeluyi1, Nguyen2 2013Phys. Rev. CSelf Cite231200View full textAdd to dashboardCite

“…Effects of gluon shadowing are investigated and potentials for constraining nuclear gluon modifications are discussed. On the theory front it has been extensively studied at various energies and for different collision systems (see for instance [2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18]). Diverse approaches ranging from models based on perturbative Quantum Chromodynamics (pQCD) to Color Dipole models and k T factorization have been used to study coherent and incoherent photoproduction of heavy mesons.…”

Exclusive photoproduction of quarkonium at the LHC energies within the color dipole approach

“…The cross section for exclusive quarkonium production is proportional to [α(Q 2 )xg A (x, Q 2 )] 2 in the leading-order pQCD calculations, evaluated at the relevant scale Q 2 ≈ m 2 V /4 and at momentum fraction x 10 −3 in central rapidities. The theoretical uncertainty is large and it has been investigated in several studies [20,21]. Along these line, the authors of Ref.…”