Hard Probes 2012

Session

Parallel IIB: Jet quenching and energy loss

28 May 2012, 16:30

Cagliari - Italy

70. p/pi ratio in jet and bulk region in heavy ion collisions

Misha Veldhoen (Utrecht University)

28/05/2012, 16:30

Oral presentation

An important open question regarding hadronization in heavy-ion collisions is to understand the baryon enhancement at intermediate pT observed at RHIC. In this work we analyze the p/π ratio in the associated yield (pT < 5.0 GeV/c) correlated to a high-pT trigger (pT > 5.0 GeV/c) in central Pb–Pb collisions. For this analysis we used Pb–Pb data taken by the ALICE detector at a center of mass...

44. Proton/pion ratios in relative azimuth with respect to a jet in √sNN = 200 GeV Au+Au collisions at STAR

Alan Davila (University of Texas at Austin)

28/05/2012, 16:50

Oral presentation

Inclusive Proton/pion ratios show an enhancement at intermediate transverse momentum (PT ~1.5 - 4.0 GeV/c) in central √sNN = 200 GeV Au+Au collisions compared to peripheral Au+Au and p+p collisions. This effect suggests a production mechanism, different from fragmentation, which is consistent with coalescence and recombination models. A high-ET trigger particle selects a surface-biased jet,...

51. Data-driven analysis methods for the measurement of reconstructed jets in heavy ion collisions at RHIC and LHC

Gabriel de Barros (Universidade de São Paulo)

28/05/2012, 17:10

Oral presentation

We present new, data-driven analysis methods for the measurement of reconstructed jets over a broad kinematic range, in the complex environment of heavy ion collisions. We utilize simple model calculations that contain the essential features of jet reconstruction in nuclear collisions at both energies, in order to assess systematic uncertainties of the methods due to large experimental...

69. Measurement of inclusive jet cross section and jet fragmentation in pp collisions with ALICE experiment at the LHC

Rongrong Ma (Yale University)

28/05/2012, 17:30

Oral presentation

Jet reconstruction and jet structure variables provide important information to study the interaction between hard scattered partons and the Quark-Gluon Plasma. This talk presents the measurement of the inclusive cross-section for fully reconstructed jets in pp collisions at \sqrt{s}=2.76 TeV, which provides an essential reference for jet measurements in Pb-Pb collisions at the same...

29. A probabilistic picture for in-medium jet evolution

Yacine Mehtar-Tani (IPhT (CEA-Saclay))

28/05/2012, 17:50

Oral presentation

We study the perturbative evolution of a jet via multiple gluon emissions induced by the interactions between the jet constituents and a dense QCD medium like a quark-gluon plasma. We focus on the typical medium-induced gluons emissions, for which the gluon formation time is much smaller than the overall size of the medium. We show that the typical time between two subsequent emissions is...