J-ψ and ψ production in protondeuteron-nucleus collisions: lessons from RHIC for the proton-lead LHC runReport as inadecuate



 J-ψ and ψ production in protondeuteron-nucleus collisions: lessons from RHIC for the proton-lead LHC run


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We study the impact of different cold nuclear matter effects both on J-\psi\ and \psi production, among them the modification of the gluon distribution in bound nucleons, commonly known as gluon shadowing, and the survival probability for a bound state to escape the nucleus -the nuclear absorption. Less conventional effects such as saturation and fractional energy loss are also discussed. We pay a particular attention to the recent PHENIX preliminary data on \psi production in dAu collisions at sqrt{s}=200 GeV, which show a strong suppression for central collisions, 5 times larger than the one obtained for J-\psi\ production at the same energy. We conclude that none of the abovementioned mechanisms can explain this experimental result.



Author: E. G. Ferreiro; F. Fleuret; J. P. Lansberg; A. Rakotozafindrabe

Source: https://archive.org/



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