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We have carried out a first calculation of $J/\Psi$ production from nuclear collisions within the covariant transport approach HSD, which has been very successful in describing both hadronic and electromagnetic observables from heavy-ion…

Nuclear Theory · Physics 2016-09-08 W. Cassing , C. M. Ko

We discuss the nuclear dependence of $\psi$ and $\psi'$ production in hadron-nucleus interactions as a function of longitudinal momentum fraction $x_F$. Nuclear effects such as final-state absorption, interactions with comovers, shadowing…

High Energy Physics - Phenomenology · Physics 2014-11-17 R. Vogt

Interpreting the J/psi suppression reported in nucleus--nucleus collisions at SPS and RHIC requires the quantitative understanding of cold nuclear matter effects, such as the inelastic rescattering of J/psi states in nuclei or the nuclear…

High Energy Physics - Phenomenology · Physics 2009-07-10 Vi-Nham Tram , Francois Arleo

We discuss a novel mechanism for J/Psi$ production in nuclear collisions arising due to the high density of gluons. We demonstrate that gluon saturation in the colliding nuclei is a dominant source of J/Psi suppression and can explain its…

Nuclear Theory · Physics 2009-11-18 Kirill Tuchin

We study medium modifications of J/psi production in cold nuclear media in deuterium-nucleus collisions. We discuss several parameterizations of the modifications of the parton densities in the nucleus, known as shadowing, an initial-state…

High Energy Physics - Phenomenology · Physics 2014-11-18 R. Vogt

The distributions of outgoing protons and charged hadrons in high energy proton-nucleus collisions are described rather well by a linear extrapolation from proton-proton collisions. This linear extrapolation is applied to precisely measured…

High Energy Physics - Phenomenology · Physics 2015-06-25 Charles Gale , Sangyong Jeon , Joseph Kapusta

We update our previous studies of nuclear-matter effects on J/Psi production in proton-nucleus for the recent LHC pPb runs at sqrt(s_NN)=5 TeV. We have analysed the effects of the modification of the gluon PDFs in nucleus, using an exact…

High Energy Physics - Phenomenology · Physics 2013-10-14 E. G. Ferreiro , F. Fleuret , J. P. Lansberg , A. Rakotozafindrabe

Based on a Glauber model, a statistical analysis of all mid-rapidity J/psi hadroproduction and leptoproduction data on nuclear targets is carried out. This allows us to determine the J/psi-nucleon inelastic cross section, whose knowledge is…

High Energy Physics - Phenomenology · Physics 2008-11-26 Francois Arleo , Vi-Nham Tram

We consider the $J/\Psi$ suppression at a high energy heavy ion collision. An ideal gas of massive hadrons in thermal and chemical equilibrium is formed in the central region. The finite-size gas expands longitudinally in accordance with…

High Energy Physics - Phenomenology · Physics 2009-10-31 Dariusz Prorok , Ludwik Turko

Forward Drell-Yan production at high energy can provide important constraints on gluon densities at small $x$, in the saturation regime. In this work we focus on the nuclear modification of this process, which could be measured at the LHC…

High Energy Physics - Phenomenology · Physics 2017-11-21 B. Ducloué

We derive the formulae for the cross section of J/Psi production in high energy pA and AA collisions taking into account the gluon saturation/color glass condensate effects. We then perform the numerical calculations of the corresponding…

High Energy Physics - Phenomenology · Physics 2015-05-30 F. Dominguez , D. E. Kharzeev , E. M. Levin , A. H. Mueller , K. Tuchin

The nuclear overlap zone in non-central relativistic heavy ion collisions is azimuthally very asymmetric. By varying the angle between the axes of deformation and the transverse direction of the pair momenta, the suppression of $J/\Psi$ and…

Nuclear Theory · Physics 2009-10-31 H. Heiselberg , R. Mattiello

We show that the distributions of outgoing protons and charged hadrons in high energy proton-nucleus collisions are described rather well by a linear extrapolation from proton-proton collisions. The only adjustable parameter required is the…

Nuclear Theory · Physics 2009-10-31 Charles Gale , Sangyong Jeon , Joseph Kapusta

A parameter-free calculation for J/Psi suppression in pA collisions, based on the dipole description, is confronted with the new data from the PHENIX experiment. Achieving good agreement, we employed this model predicting the contribution…

High Energy Physics - Phenomenology · Physics 2011-08-19 B. Z. Kopeliovich , I. K. Potashnikov , Ivan Schmidt

We have examined the available latest SPS data on $J/\psi$ suppression in Pb+Pb and In+In collisions at 158 A GeV. Our employed model, with parameters fixed by $p$-$p$ and $p$-nucleus collisions, gives excellent description of NA50 and NA60…

High Energy Physics - Phenomenology · Physics 2015-06-05 Partha Pratim Bhaduri , A. K. Chaudhuri , Subhasis Chattopadhyay

$J/\psi$ suppression with rapidity is studied with both (3+1) dimensional transport equation and hydrodynamics in details at $\sqrt{s_{NN}}=2.76$ TeV Pb+Pb collisions. In central rapidity region of the hot medium, $J/\psi$ nuclear…

High Energy Physics - Phenomenology · Physics 2016-05-18 Baoyi Chen

We report a measurement of exclusive $J/\psi$ photoproduction in Au$+$Au ultra-peripheral collisions at $\sqrt{s_{_\mathrm{NN}}}=200$ GeV using the STAR detector. For the first time, i) the rapidity correlation between $J/\psi$…

Nuclear Experiment · Physics 2024-08-05 STAR Collaboration

The in-medium modification of nucleon-nucleon (NN) cross sections is investigated by means of particle production in heavy ion collisions (HIC) at intermediate energies. In particular, the density dependence of the {\it inelastic} cross…

Nuclear Theory · Physics 2007-05-23 V. Prassa , T. Gaitanos , H. H. Wolter , G. Lalazissis , M. Di Toro

The relation between nuclear saturation and NN-correlations is examined. Nucleons bound in a nucleus have a reduced effective mass due to the mean field. This results in off-energy-shell scatterings modifying the free-space NN-interaction…

Nuclear Theory · Physics 2007-05-23 H. S. Köhler , S. A. Moszkowski

A novel observable, the double nuclear modification factor, is proposed to probe simultaneously the initial and final state effects in nucleus-nucleus collisions. An interesting competition between the combinatorial enhancement in the…

Nuclear Theory · Physics 2024-05-30 S. P. Baranov , A. V. Lipatov , M. A. Malyshev , A. M. Snigirev