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arXiv · 0907.3682

J/psi production in p-A collisions at 158 and 400 GeV: recent results from the NA60 experiment

E. Scomparin
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Abstract

The NA60 experiment has studied muon pair production in p-A and In-In collisions at the CERN SPS. We present new results on nuclear effects on J/psi production in p-A at 158 GeV, the same energy used for collecting A-A data at the SPS. We then compare nuclear effects with previous results from fixed target experiments, and with the results obtained from a p-A data sample taken by NA60 at 400 GeV. Based on the 158 GeV results, we calculate the expected J/psi suppression in In-In and Pb-Pb collisions due to cold nuclear matter effects, and we extract a new estimate for the anomalous suppression at SPS energies. Finally, we show preliminary results on J/psi polarization in p-A collisions.

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E. Scomparin. 2009-09-22. J/psi production in p-A collisions at 158 and 400 GeV: recent results from the NA60 experiment. https://doi.org/10.1016/j.nuclphysa.2009.10.020

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