1,720,964 research outputs found
Sequential quarkonium suppression
No full textDigal S, Petreczky P, Satz H. Sequential quarkonium suppression. 2001
Interplay between chiral transition and deconfinement
No full textDigal S, Laermann E, Satz H. Interplay between chiral transition and deconfinement. NUCLEAR PHYSICS A. 2002;702:159C-163C
Heavy quark interactions in finite temperature QCD
No full textDigal S, Kaczmarek O, Karsch F, Satz H. Heavy quark interactions in finite temperature QCD. Eur.Phys.J. 2005;43(1-4):71-75.We study the free energy of a heavy quark-antiquark pair in a thermal medium. We constuct a simple ansatz for the free energy for two quark flavors motivated by the Debye-Huckel theory of screening
Predictions for J/psi suppression by parton percolation
No full textDigal S, Fortunato S, Satz H. Predictions for J/psi suppression by parton percolation. EUROPEAN PHYSICAL JOURNAL C. 2004;32(4):547-553.Parton percolation provides geometric deconfinement in the pre-equilibrium stage of nuclear collisions. The resulting parton condensate can lead to charmonium suppression. We formulate a local percolation condition viable for non-uniform collision environments and show that it correctly reproduces the suppression observed for S-U and Pb-Pb collisions at the SPS. Using this formulation, we then determine the behavior of J/psi suppression for In-In collisions at the SPS and for Au-Au collisions at RHIC
Charmonium production and corona effect
Full text linkDigal S, Satz H, Vogt R. Charmonium production and corona effect. Physical Review C. 2012;85(3): 034906.We study the centrality dependence to be expected if only charmonium production in the corona survives in high-energy nuclear collisions, with full suppression in the hot, deconfined core. To eliminate cold nuclear matter effects as far as possible, we consider the ratio of charmonium to open charm production. The centrality dependence of this ratio is found to follow a universal geometric form, applicable to both the Large Hadron Collider (LHC) and the Relativistic Heavy-Ion Collider (RHIC) in collisions at both central and forward rapidities
String breaking and quarkonium dissociation at finite temperatures
No full textDigal S, Petreczky P, Satz H. String breaking and quarkonium dissociation at finite temperatures. PHYSICS LETTERS B. 2001;514(1-2):57-62.Recent lattice studies of string breaking in QCD with dynamical quarks determine the in-medium temperature dependence of the heavy quark potential. Comparing this to the binding energies of different quarkonium states, we check if these can decay into open charm/beauty in a confined hadronic medium. Our studies indicate in particular that the chi (c) and the psi ' dissociate into open charm below the deconfinement point. (C) 2001 Published by Elsevier Science B.V
Deconfinement through chiral symmetry restoration in two-flavour QCD
No full textDigal S, Laermann E, Satz H. Deconfinement through chiral symmetry restoration in two-flavour QCD. EUROPEAN PHYSICAL JOURNAL C. 2001;18(3):583-586.We propose that in QCD with dynamical quarks, colour deconfinement occurs when an external field induced by the chiral condensate strongly aligns the Polyakov loop. This Effect sets in at the chiral symmetry restoration temperature T-chi and thus makes deconfinement and chiral symmetry restoration coincide. The predicted singular behaviour of Polyakov loop susceptibilities at T-chi is shown to be supported by finite temperature lattice calculations
Deconfinement through chiral transition in 2 flavour QCD
No full textDigal S, Laermann E, Satz H. Deconfinement through chiral transition in 2 flavour QCD. In: Nuclear Physics B - Proceedings Supplements. NUCLEAR PHYSICS B-PROCEEDINGS SUPPLEMENTS. Vol 94. ELSEVIER SCIENCE BV; 2001: 389-392.We propose that in QCD with dynamical quarks, colour deconfinement occurs when an external field induced by the chiral condensate strongly aligns the Polyakov loop. This effect sets in at the chiral symmetry restoration temperature Tx and thus makes deconfinement and chiral symmetry restoration coincide. The predicted singular behavior of Polyakov loop susceptibilities at T-chi is shown to be supported by finite temperature lattice calculations
Parton percolation and J/psi suppression
No full textDigal S, Fortunato S, Petreczky P, Satz H. Parton percolation and J/psi suppression. PHYSICS LETTERS B. 2002;549(1-2):101-108.The geometric clustering of partons in the transverse plane of nuclear collisions leads for increasing A or roots to percolation. In the resulting condensate, the partons are deconfined but not yet in thermal equilibrium. We discuss quarkonium dissociation in this precursor of the quark-gluon plasma, with an onset of dissociation when the saturation scale of the parton condensate reaches that of the given quarkonium state. (C) 2002 Elsevier Science B.V. All rights reserved
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