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Ilkka Helenius (U)18/08/2012, 09:20Pre-equilibrium and initial state dynamicsOral PresentationThe knowledge of the parton distribution functions (PDFs) is essential for interpreting any hard-process results from hadronic and nuclear collisions. The nuclear modifications of PDFs have been successfully determined through a global DGLAP analysis e.g. in the sets EKS98 and more recently EPS09. So far the nuclear PDFs (nPDFs) in the global fits have been taken to be spatially independent....Go to contribution page
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Dennis Perepelitsa (Columbia University)18/08/2012, 09:30JetsOral PresentationProton-nucleus (p+A) collisions can be used to investigate cold nuclear matter effects on hard-scattered partons and serve as an important baseline for heavy-ion collisions. In particular, p+A collisions at different centrality selections can probe the impact parameter dependence of nuclear parton distribution functions, initial state energy loss and final state parton interactions in the cold...Go to contribution page
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Ms Yaxian Mao (Vanderbilt University (US))18/08/2012, 09:40JetsOral PresentationThe poster presents jet shapes, defined as the fractional transverse momentum distribution as a function of the distance r from the jet axis, where the jets are reconstructed by the anti-kT clustering algorithm. We determine the energy flow inside the jet by using particles reconstructed and calibrated using the Particle Flow algorithm. Different background subtraction methods are employed to...Go to contribution page
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Jorge A Robles (Rutgers, State Univ. of New Jersey (US))18/08/2012, 09:50Heavy flavor and quarkonium productionOral PresentationThe flavor dependence of jet quenching is a powerful handle to discriminate models of parton energy loss in heavy ion collisions. While there is evidence for a strong energy loss of heavy quarks from single particle measurements, heavy flavor tagging of fully reconstructed jets has thus far not been achieved in heavy ion collisions. In this talk we demonstrate the capacity of CMS to identify...Go to contribution page
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Marta Verweij (University of Utrecht (NL))18/08/2012, 10:00JetsOral PresentationWe report a measurement of transverse momentum spectra of jets detected with the ALICE detector in Pb-Pb collisions at $\sqrt{s_NN}$=2.76 TeV. Jets are reconstructed from charged particles using the anti-$k_{T}$ jet algorithm. The transverse momentum of tracks is measured down to 150 MeV/c which gives access to the low $p_{T}$ fragments of the jet. The background from soft particle production...Go to contribution page
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Masayuki Wada (University of Texas at Austin)18/08/2012, 10:10Hadron thermodynamics and chemistryOral PresentationHadronic resonances can play a pivotal role in providing experimental evidence for partial chiral symmetry restoration in the deconfined quark-gluon phase produced in high energy nucleus-nucleus collisions. Their lifetimes, which are comparable to the lifetime of the fireball, make them a valuable tool to study medium modifications to the resonant state due to the chiral phase transition...Go to contribution page
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Mr Yasuki Tachibana (Department of Physics, The University of Tokyo)18/08/2012, 10:20JetsOral PresentationHot and dense QCD matter, namely the quark gluon plasma, is created in high energy heavy ion collisions. High energy partons are also created through initial hard scatterings and have to traverse the QGP medium. These energetic partons are subject to lose their energy due to strong interactions with the medium. So jets in heavy ion collisions are expected to give information about the stopping...Go to contribution page
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Todd Springer (U)18/08/2012, 10:30New theoretical developmentsOral PresentationWe investigate contributions from local hydrodynamic fluctuations to the near side ridge in the two‐particle correlation data from heavy ion collisions. We introduce a local perturbation on top of a hydrodynamic flow which respects conformal symmetry and incorporates radial flow. The subsequent evolution of the perturbation is determined by hydrodynamics; after freeze‐out, we examine the...Go to contribution page
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