Speaker
Kazuhiro Watanabe
(The University of Tokyo)
Description
Understanding of the initial state effects on heavy ion collisions
is indispensable for quantifying the subsequent hot medium effects
in the observables.
Heavy quark pair production in proton-nucleus (pA)
collisions provides us with a unique opportunity to probe the gluons
at small Bjorken's x in the heavy target nucleus,
where the so-called parton saturation effect becomes important
for particle production.
We have studied heavy quark pair production in pA collisions within the color glass condensate (CGC) framework [1] by adopting numerical solutions for gluon distributions obtained from the Balitsky-Kovchegov equation with running coupling corrections [2, 3].
We report our numerical results on J/psi and D productions in pA collisions
at the RHIC and LHC energies [4, 5], and discuss possible extension our calculation in light of recent experimental data.
References:
1. J.-P. Blaizot, F. Gelis, and R. Venugopalan, Nucl. Phys. A743, 57 (2004).
2. I. Balitsky, Phys. Rev. D75, 014001 (2007).
3. Yuri V. Kovchegov and H. Weigert, Nucl.Phys. A784, 188 (2007).
4. H. Fujii and K. Watanabe, Nucl. Phys. A915, 1 (2013).
5. H. Fujii and K. Watanabe, Nucl. Phys. A920, 78 (2013).
Author
Kazuhiro Watanabe
(The University of Tokyo)
Co-author
Hirotsugu Fujii
(University of Tokyo)
