1207.6649 (Shawn Whitaker)

Upsilon Measurements by the PHENIX Collaboration    [PDF]

Shawn Whitaker

PHENIX has measured $\Upsilon$ production in p+p, d+Au and Au+Au collisions at $\sqrt{s_{NN}}$=200 GeV. A baseline cross-section measurement has been made in p+p collisions and has been shown to be in good agreement with world trends. Preliminary studies of d+Au collisions found no suppression in the backward direction, but suppression was observed in the forward direction indicating the presence of cold nuclear matter effects. In Au+Au collisions preliminary studies of $\Upsilon$ production at mid-rapidity found hints of suppression and has been shown to be in good agreement with global trends.

View original: http://arxiv.org/abs/1207.6649