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J/Ψ production at low pT in Au+Au and Cu+Cu collisions at √sNN = 200 GeV with the STAR detector (CROSBI ID 210383)

Prilog u časopisu | izvorni znanstveni rad | međunarodna recenzija

Adamczyk, L. ; ... ; Planinić, Mirko ; ... ; Poljak, Nikola ; ... ; Zyzak, M. J/Ψ production at low pT in Au+Au and Cu+Cu collisions at √sNN = 200 GeV with the STAR detector // Physical review. C, Nuclear physics, 90 (2014), 24906-1-24906-14. doi: 10.1103/PhysRevC.90.024906

Podaci o odgovornosti

Adamczyk, L. ; ... ; Planinić, Mirko ; ... ; Poljak, Nikola ; ... ; Zyzak, M.

engleski

J/Ψ production at low pT in Au+Au and Cu+Cu collisions at √sNN = 200 GeV with the STAR detector

The J/ψ pT spectrum and nuclear modification factor (RAA) are reported for pT<5GeV/c and ∣∣y∣∣<1 from 0% to 60% central Au+Au and Cu+Cu collisions at sNN‾‾‾‾√=200GeV at STAR. A significant suppression of pT-integrated J/ψ production is observed in central Au+Au events. The Cu+Cu data are consistent with no suppression, although the precision is limited by the available statistics. RAA in Au+Au collisions exhibits a strong suppression at low transverse momentum and gradually increases with pT. The data are compared to high-pT STAR results and previously published BNL Relativistic Heavy Ion Collider results. Comparing with model calculations, it is found that the invariant yields at low pT are significantly above hydrodynamic flow predictions but are consistent with models that include color screening and regeneration.

J/Psi; pT; STAR

Star Collaboration.

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Podaci o izdanju

90

2014.

24906-1-24906-14

objavljeno

0556-2813

10.1103/PhysRevC.90.024906

Povezanost rada

Fizika

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