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CERN Heavy Ion Forum
CERN Heavy Ion Forum on Jet Physics
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Europe/Zurich
40-SS-C01 (CERN)
40-SS-C01
CERN
Description
1. Boris Tomasik: Formation time and the jet suppresion at RHIC
I will present a Glauber-type mechanism which leads to suppression of jets with pt up to 10 GeV/c at RHIC. For processes in this kinematic region, the formation time is smaller than the interval between two successive hard pertonic collisions and the subsequent collision influences the jet production. This breaks the scaling with the number of binary collisions. The mechanism also leads to a suppression of jet production in d+Au collisions at RHIC.
2. Nestor Armesto: NLO QCD predictions for Jet and Dijet Rates in Nuclear Collisions at the LHC
Jet and dijet cross sections in nuclear collisions at the LHC will be computed in QCD at NLO. Four sources of uncertainties, namely parton densities in the nucleon, nuclear effects in parton densities, jet-finding algorithm and scale dependence, will be discussed. The ratio of LO+NLO over LO predictions will also be examined. Predictions for the corresponding rates in different collisions will be given.
3. Peter Levai: Parton coalescence and antiproton/pion anomaly at RHIC
Coalescence of minijet partons with the partons from the quark-gluon plasma formed in relativistic heavy ion collisions is suggested as the mechanism for production of hadrons with intermediate transverse momentum. The resulting enhanced antiproton and pion yields at intermediate transverse momentum gives a plausible explanation for the observed large antiproton to pion ratio. With further increasing momentum, the ratio is predicted to decrease and approach the small value given by independent fragmentations of minijet partons after their energy loss in the quark-gluon plasma.
Organiser(s): Yiota Foka, Guy Paic and Urs Wiedemann
I will present a Glauber-type mechanism which leads to suppression of jets with pt up to 10 GeV/c at RHIC. For processes in this kinematic region, the formation time is smaller than the interval between two successive hard pertonic collisions and the subsequent collision influences the jet production. This breaks the scaling with the number of binary collisions. The mechanism also leads to a suppression of jet production in d+Au collisions at RHIC.
2. Nestor Armesto: NLO QCD predictions for Jet and Dijet Rates in Nuclear Collisions at the LHC
Jet and dijet cross sections in nuclear collisions at the LHC will be computed in QCD at NLO. Four sources of uncertainties, namely parton densities in the nucleon, nuclear effects in parton densities, jet-finding algorithm and scale dependence, will be discussed. The ratio of LO+NLO over LO predictions will also be examined. Predictions for the corresponding rates in different collisions will be given.
3. Peter Levai: Parton coalescence and antiproton/pion anomaly at RHIC
Coalescence of minijet partons with the partons from the quark-gluon plasma formed in relativistic heavy ion collisions is suggested as the mechanism for production of hadrons with intermediate transverse momentum. The resulting enhanced antiproton and pion yields at intermediate transverse momentum gives a plausible explanation for the observed large antiproton to pion ratio. With further increasing momentum, the ratio is predicted to decrease and approach the small value given by independent fragmentations of minijet partons after their energy loss in the quark-gluon plasma.
Organiser(s): Yiota Foka, Guy Paic and Urs Wiedemann