Measurement of Upsilon production cross section in d+Au collisions at $\sqrt{s_{NN}}$=200 GeV

ORAL

Abstract

Suppression of charmonia production in heavy-ion collisions, due to Debye screening of the quark-antiquark potential, was proposed as a clear signature of quark-gluon plasma (QGP) formation. However, further understanding of factors that influence charmonia production in heavy-ion collisions complicates this analysis. These factors include competing effects such as recombination enhancement and suppression due to comover absorption; these effects are negligible in $\Upsilon$ production. Furthermore, cold nuclear matter (CNM) effects can effect the rate of $\Upsilon$ production in heavy-ion collisions. These effects can be quantified by measuring production rates in d+Au collisions. We report on the measurement of the $\Upsilon$ production cross section via the $e^+e^-$ decay channel in d+Au collisions at $\sqrt{s_{NN}}$=200 GeV. We use the high-statistics data available from the 2008 run.

Authors

  • Anthony Kesich

    UC Davis