Heavy quark radiative energy loss in QCD matter

Djordjevic, Magdalena; Gyulassy, Miklós

doi:10.1016/j.nuclphysa.2003.12.020

Cited by 317 publications

(392 citation statements)

References 54 publications

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“…We include the quenching effect in the calculation of R AA by calculating the quenching factor for a "gluon" of mass 2m Q traversing the medium for a time t form . The details of the GLV formalism used for the energy loss calculation can be found in [71]. In our calculation, we incorporate the fluctuations of the energy loss due to the multiple gluon emission and the diffuseness of the nuclear geometry (fluctuations in path length).…”

Section: Quenching Of the Color-octet Statementioning

confidence: 99%

High transverse momentum quarkonium production and dissociation in heavy ion collisions

2013

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We calculate the yields of quarkonia in heavy ion collisions at RHIC and the LHC as a function of their transverse momentum. Based upon non-relativistic quantum chromodynamics, our results include both color-singlet and color-octet contributions and feed-down effects from excited states. In reactions with ultra-relativistic nuclei, we focus on the consistent implementation of dynamically calculated nuclear matter effects, such as coherent power corrections, cold nuclear matter energy loss, and the Cronin effect in the initial state. In the final state, we consider radiative energy loss for the color-octet state and collisional dissociation of quarkonia as they traverse through the QGP. Theoretical results are presented for J/ψ and Υ and compared to experimental data where applicable. At RHIC, a good description of the high-pT J/ψ modification observed in central Cu+Cu and Au+Au collisions can be achieved within the model uncertainties. We find that measurements of J/ψ yields in proton-nucleus reactions are needed to constrain the magnitude of cold nuclear matter effects. At the LHC, a good description of the experimental data can be achieved only in mid-central and peripheral Pb+Pb collisions. The large five-fold suppression of prompt J/ψ in the most central nuclear reactions may indicate for the first time possible thermal effects at the level of the quarkonium wavefunction at large transverse momenta.

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Section: Quenching Of the Color-octet Statementioning

confidence: 99%

High transverse momentum quarkonium production and dissociation in heavy ion collisions

2013

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“…Another important contribution to c production is from the decay of c ground state, c (2455) of spin-1/2, via the c → c π decay. 4 In thermal model, its abundance relative to that of c is…”

Section: The Thermal Modelmentioning

confidence: 99%

“…Recent measurements on nonphotonic electrons from decays of midrapidity heavy-flavored mesons in central heavy ion collisions at the Relativistic Heavy Ion Collider (RHIC) have shown that the nuclear modification factor R e AA relative to pp collisions is significantly smaller than theoretical predictions based on radiative energy loss of heavy quarks in produced quark-gluon plasma [1][2][3][4]. To explain the observed small value of R e AA or large suppression of heavy meson production in relativistic heavy ion collisions, other mechanisms for energy loss of heavy quarks in quark-gluon plasma have been proposed [5][6][7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Ratios of heavy baryons to heavy mesons in relativistic nucleus-nucleus collisions

et al. 2009

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Heavy baryon/meson ratios c /D 0 and b /B 0 in relativistic heavy ion collisions are studied in the quark coalescence model. For heavy baryons, we include production from coalescence of heavy quarks with free light quarks as well as with bounded light diquarks that might exist in the strongly coupled quark-gluon plasma produced in these collisions. Including the contribution from decays of heavy hadron resonances and also that due to fragmentation of heavy quarks that are left in the system after coalescence, the resulting c /D 0 and b /B 0 ratios in midrapidity (|y| 0.5) from central Au + Au collisions at √ s NN = 200 GeV are about a factor of five and ten, respectively, larger than those given by the thermal model, and about a factor of ten and twelve, respectively, larger than corresponding ratios in the PYTHIA model for pp collisions. These ratios are reduced by a factor of about 1.6 if there are no diquarks in the quark-gluon plasma. The transverse momentum dependence of the heavy baryon/meson ratios is found to be sensitive to the heavy quark mass, with the b /B 0 ratio being much flatter than the c /D 0 ratio. The latter peaks at the transverse momentum p T

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“…The models that were considered and compared to data are: I WHDG [125][126][127]. It is a perturbative QCD calculation of parton energy loss, including both radiative (DGLV [128]) and collisional processes. A realistic collision geometry based on the Glauber model [15] is used, without hydrodynamical expansion, so that the anisotropy results only from path-length dependent energy loss.…”

Section: Comparison With Model Calculationsmentioning

confidence: 99%

Measurement of the D0 Meson Production in Pb–Pb and p–Pb Collisions

Festanti

2016

Springer Theses

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This thesis presents the measurement of the charmed D 0 meson production relative to the reaction plane in Pb-Pb collisions at the centre-of-mass energy per nucleon-nucleon collision of √ s NN = 2.76 TeV, and the measurement of the D 0 production in p-Pb collisions at √ s NN = 5.02 TeV with the ALICE detector at the CERN Large Hadron Collider.The D 0 azimuthal anisotropy with respect to the reaction plane is sensitive to the interaction of the charm quarks with the high-density strongly-interacting medium formed in ultra-relativistic heavy-ion collisions and, thus, to the properties of this state of matter. In particular, this observable allows to establish whether low-momentum charm quarks participate in the collective expansion of the system and whether they can reach thermal equilibrium with the medium constituents. The azimuthal anisotropy is quan- −0.036 in the interval 2 < p T < 6 GeV/c, which decreases towards more central collisions. Consequently, the nuclear modification factor shows a stronger suppression in the direction orthogonal to the reaction plane. The v 2 and the R AA measured in two azimuthal regions with respect to the reaction plane are compared to theoretical calculations of charm quark transport and energy loss in high-density strongly-interacting matter. The models that include substantial elastic interactions with an expanding medium provide a good description of the observed anisotropy.The D 0 nuclear modification factor R pPb in p-Pb collisions is compatible with unity within uncertainties. The measured R pPb is compared to theoretical models including initial state effects, as well as to the nuclear modification factor measured in central RiassuntoLa tesi presenta la misura della produzione di mesoni D 0 rispetto al piano di reazione in collisioni Pb-Pb all'energia nel centro di massa di √ s NN = 2.76 TeV per coppia di nucleoni e la misura della produzione di D 0 in collisioni p-Pb all'energia di √ s NN = 5.02 TeV con l'esperimento ALICE situato al Large Hadron Collider del CERN.L'anisotropia azimutale dei mesoni D 0 rispetto al piano di reazioneè sensibile alle interazioni del quark charm con il mezzo ad alta densità e fortemente interagente prodotto in collisioni tra ioni pesanti ad energia ultra-relativistica e, di conseguenza, alle proprietà di questo stato della materia. In particolare, permette di stabilire se i quark charm partecipano all'espansione collettiva del sistema e se raggiungono l'equilibrio termico con i costituenti del mezzo. L'anisotropia azimutaleè quantificata tramite il secondo coefficiente v 2 dello sviluppo in serie di Fourier della distribuzione azimutale dei mesoni D 0 e tramite la misura del fattore di modifica nucleare R AA nel piano di reazione e nella direzione ortogonale ad esso. La misura della produzione di D 0 in collisioni p-Pb permette di studiare gli effetti indotti dalla materia nucleare fredda, in modo da poterli distinguere da quelli indotti dal mezzo denso fortemente interagente prodotto in collisioni Pb-Pb.La produzione di mesoni D 0...

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Heavy quark radiative energy loss in QCD matter

Cited by 317 publications

References 54 publications

High transverse momentum quarkonium production and dissociation in heavy ion collisions

High transverse momentum quarkonium production and dissociation in heavy ion collisions

Ratios of heavy baryons to heavy mesons in relativistic nucleus-nucleus collisions

Measurement of the D0 Meson Production in Pb–Pb and p–Pb Collisions

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