Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2010-02-11
J. Phys. G: Nucl. Part. Phys. 37 (2010) 094055
Physics
High Energy Physics
High Energy Physics - Phenomenology
6 pages, 1 table, 3 figures, Submitted to J. Phys. G, talk given at the International Conference on Strangeness in Quark Matte
Scientific paper
10.1088/0954-3899/37/9/094055
We investigate the cold nuclear matter effects on $J/\psi$ production, whose understanding is fundamental to study the quark-gluon plasma. Two of these effects are of particular relevance: the shadowing of the parton distributions and the nuclear absorption of the $c\bar{c}$ pair. If $J/\psi$'s are not produced {\it via} a $2 \to 1$ process as suggested by recent theoretical works, one has to modify accordingly the way to compute the nuclear shadowing. This naturally induces differences in the absorption cross-section fit to the data. A careful analysis of these differences however requires taking into account the experimental uncertainties and their correlations, as done in this work for $d$Au collisions at $\sqrtsNN=200\mathrm{GeV}$, using several shadowing parametrisations.
Ferreiro Elena G.
Fleuret François
Lansberg Jean-Philippe
Rakotozafindrabe A.
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