Heavy-quarkonium suppression in p-A collisions from parton energy loss in cold QCD matterReport as inadecuate



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


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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 strongly 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.



Author: François Arleo; Stéphane Peigné

Source: https://archive.org/







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