Jul 16 – 22, 2009
Kraków, Poland
Europe/Warsaw timezone

EMC Effect in Heavy Ion Collision

Jul 16, 2009, 3:50 PM
Small Hall (Kraków, Poland)

Small Hall

Kraków, Poland

The Auditorium Maximum of the Jagiellonian University 33 Krupnicza Street 31-123 Kraków
Heavy Ions IV. Heavy Ions


Dr Gergely Gabor Barnafoldi (MTA KFKI RMKI)


Recent data in heavy ion collisions show suppression at high transverse momenta, which might be identified as the EMC effect. The influence of nuclear parton distribution functions (nPDFs) on high-$p_T$ hadron production in deuteron-gold $dAu$ collisions at RHIC was investigated using a pQCD-improved parton model and several different parameterizations of nuclear PDFs, including the latest HKN and EPS09. We study whether the EMC suppression of nuclear PDFs is responsible for the observed suppression of high-$p_T$ $\pi^0$ and $\gamma$ production in $dAu$ collisions. We did a slope analysis Theoretical uncertainties in the nuclear modification factor, $R_{dAu}$ resulting from uncertainties in the PDF fits and from pQCD scale uncertainties are evaluated uniquely. We have also checked, the possibility that final-state energy loss of jets could also contribute to the observed suppression is evaluated using a simplistic implementation of the GLV energy loss model.

Primary author

Dr Gergely Gabor Barnafoldi (MTA KFKI RMKI)


Prof. Brian A. Cole (Columbia University) Prof. Gabor Papp (Eotvos University) Prof. George Fai (Kent State University) Dr Peter Levai (MTA KFKI RMKI)

Presentation materials