Heavy-quarkonium suppression in p-A collisions from parton energy loss in cold QCD matter

François Arleo, Stéphane Peigné
2013 Journal of High Energy Physics  
The effects of parton energy loss in cold nuclear matter on heavy-quarkonium suppression in p-A collisions are studied. It is shown from first principles that at large quarkonium energy E and small production angle in the nucleus rest frame, the medium-induced energy loss scales as E. Using this result, a phenomenological model depending on a single free parameter is able to reproduce J/psi and Upsilon suppression data in a broad xF-range and at various center-of-mass energies. These results
more » ... ongly support energy loss as the dominant effect in heavy-quarkonium suppression in p-A collisions. Predictions for J/psi and Upsilon suppression in p-Pb collisions at the LHC are made. It is argued that parton energy loss scaling as E should generally apply to hadron production in p-A collisions, such as light hadron or open charm production.
doi:10.1007/jhep03(2013)122 fatcat:4bppaaaxe5fmbfd2zmz4b6exhy