TY - JOUR
T1 - Cold nuclear matter effects on J / ψ production
T2 - Intrinsic and extrinsic transverse momentum effects
AU - Ferreiro, E. G.
AU - Fleuret, F.
AU - Lansberg, J. P.
AU - Rakotozafindrabe, A.
PY - 2009/9/14
Y1 - 2009/9/14
N2 - Cold nuclear matter effects on J / ψ production in proton-nucleus and nucleus-nucleus collisions are evaluated taking into account the specific J / ψ-production kinematics at the partonic level, the shadowing of the initial parton distributions and the absorption in the nuclear matter. We consider two different parton processes for the c over(c, ̄)-pair production: one with collinear gluons and a recoiling gluon in the final state and the other with initial gluons carrying intrinsic transverse momentum. Our results are compared to RHIC observables. The smaller values of the nuclear modification factor RA A in the forward rapidity region (with respect to the mid rapidity region) are partially explained, therefore potentially reducing the need for recombination effects.
AB - Cold nuclear matter effects on J / ψ production in proton-nucleus and nucleus-nucleus collisions are evaluated taking into account the specific J / ψ-production kinematics at the partonic level, the shadowing of the initial parton distributions and the absorption in the nuclear matter. We consider two different parton processes for the c over(c, ̄)-pair production: one with collinear gluons and a recoiling gluon in the final state and the other with initial gluons carrying intrinsic transverse momentum. Our results are compared to RHIC observables. The smaller values of the nuclear modification factor RA A in the forward rapidity region (with respect to the mid rapidity region) are partially explained, therefore potentially reducing the need for recombination effects.
KW - Cold nuclear matter effects
KW - Heavy-ion collisions
KW - J / ψ production
U2 - 10.1016/j.physletb.2009.07.076
DO - 10.1016/j.physletb.2009.07.076
M3 - Article
AN - SCOPUS:69349096621
SN - 0370-2693
VL - 680
SP - 50
EP - 55
JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
IS - 1
ER -