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J/psi production at high transverse momentum in p+p and Cu+Cu collisions at sNN=200GeV
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The STAR collaboration at RHIC presents measurements of \Jpsi$\to{e^+e^-}$ at mid-rapidity and high transverse momentum ($p_T>5$ GeV/$c$) in \pp and central \cucu collisions at \sNN = 200 GeV. The inclusive \Jpsi production cross section for \cucu collisions is found to be consistent at high $p_T$ with the binary collision-scaled cross section for \pp collisions, in contrast to previous measurements at lower $p_T$, where a suppression of \Jpsi production is observed relative to the expectation from binary scaling. Azimuthal correlations of $J/\psi$ with charged hadrons in \pp collisions provide an estimate of the contribution of $B$-meson decays to \Jpsi production of $13% \pm 5%$.
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Cited by 1 Pith paper
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Quantum decoherence: a study applied to quarkonium-like bound states in strongly interacting matter
A Lindblad master equation for a J/psi-like harmonic oscillator in an expanding QGP shows that hydrodynamic cooling slows quantum decoherence compared to a static bath, with viscosity having negligible impact.
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