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J/$ψ$ and $ψ(2S)$ measurement in p+p collisions at $\sqrt{s} =$ 200 and 500 GeV with the STAR experiment (1512.07398v1)

Published 23 Dec 2015 in hep-ex and nucl-ex

Abstract: In this paper, results on the J/psi cross section and polarization measured via the dielectron decay channel at mid-rapidity in p+p collisions at 200 and 500 GeV in the STAR experiment are discussed. Also, first measurements of the J/psi production as a function of the charged-particle multiplicity density and of psi(2S) to J/psi ratio at 500 GeV are reported.

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