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J/psi Production in sqrt (s_NN)= 200 GeV Cu+Cu Collisions

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arxiv 0801.0220 v2 pith:5RDZX2SB submitted 2007-12-31 nucl-ex

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keywords collisionsproductiondatarapiditysqrttransversebeenbeyond
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Yields for J/psi production in Cu+Cu collisions at sqrt (s_NN)= 200 GeV have been measured by the PHENIX experiment over the rapidity range |y| < 2.2 at transverse momenta from 0 to beyond 5 GeV/c. The invariant yield is obtained as a function of rapidity, transverse momentum and collision centrality, and compared with results in p+p and Au+Au collisions at the same energy. The Cu+Cu data provide greatly improved precision over existing Au+Au data for J/psi production in collisions with small to intermediate numbers of participants, providing a key constraint that is needed for disentangling cold and hot nuclear matter effects.

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  1. Non-relativistic QCD Study of Excited Bottomonia at Finite Temperatures on a Fine Lattice

    hep-lat 2025-01 conditional novelty 4.0 of 10

    Excited bottomonia in a quark-gluon plasma acquire temperature-dependent widths with no significant mass shifts, according to a Gaussian model fit to lattice NRQCD correlators.

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