Nuclear Theory/RIKEN seminar

"Novel mechanisms of charmonium suppression/enhancement in pA and AA collisions"

Presented by Boris Kopeliovich, Universidad Tecnica Federico Santa Maria, Valparaiso

Friday, June 5, 2015, 2:00 pm — Small Seminar Room, Bldg. 510

Charmonium production in pA collisions is known to be suppressed by shadowing and absorption. There are however nuclear effects, which enhance charmonium yield. They steeply rise with energy and seem to show up in LHC data for J/psi production in pA collisions. In the case of heavy ion collisions produced charmonia are additionally suppressed by final state interaction in the created dense medium. On the contrary to current evaluations of the melting effects caused by Debye screening, a charmonium produced with a large pT easily survives even at high temperatures. Another source of charmonium suppression, missed in previous calculations, color-exchange interactions with the medium, leads to suppression of a comparable magnitude. A quantitative comparison is performed.

Hosted by: Soeren Schlichting

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