Dilepton production in proton-proton and Pb+Pb collisions at<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msqrt><mml:msub><mml:mi>s</mml:mi><mml:mrow><mml:mi>N</mml:mi><mml:mi>N</mml:mi></mml:mrow></mml:msub></mml:msqrt><mml:mo>=</mml:mo><mml:mn>2.76</mml:mn></mml:mrow></mml:math>TeV

Linnyk, O.; Cassing, W.; Manninen, Jussi; Bratkovskaya, Elena; Gossiaux, Pol Bernard; Aichelin, J.; Song, Taesoo; Ko, C. M.

doi:10.1103/physrevc.87.014905

Cited by 41 publications

(45 citation statements)

References 109 publications

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“…In Ref. [44] the authors study the PartonHadron-String Dynamics transport approach, and find that the contribution of the dileptos from the the decays of DD and BB mesons is lower than the thermal dileptons in the intermediate and high invariant mass region at LHC. This provides the possibility to measure the jet-dilepton conversion from the QGP.…”

Section: Resultsmentioning

confidence: 99%

Jet-dilepton conversion in expanding quark-gluon plasma

Fu¹,

Qin²

2015

Phys. Rev. C

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We calculate the production of large mass dileptons from the jet-dilepton conversion in the expanding quark-gluon plasma at Relativistic Heavy Ion Collider (RHIC) and Large Hadron Collider (LHC) energies. The jet-dilepton conversion exceeds the thermal dilepton production and Drell-Yan process in the large mass region of 3.9 GeV< M <5.8 GeV and 6.3 GeV< M <8.7 GeV in central Pb+Pb collisions at √ sNN =2.76 TeV and 5.5 TeV, respectively. We present the numerical solution of ideal fluid hydrodynamics. We find that the transverse flow leads to a rapid cooling of the fire ball. The suppression due to transverse flow is appeared from small to large mass, the transverse flow effect becomes important at LHC energies. The energy loss of jets in the hot and dense medium is also included.

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Section: Resultsmentioning

confidence: 99%

Jet-dilepton conversion in expanding quark-gluon plasma

Fu¹,

Qin²

2015

Phys. Rev. C

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“…[48]; model results and their comparison with experimental observables for heavy-ion collisions from the lower super-proton-synchrotron (SPS) to relativistic-heavy-ion-collider (RHIC) energies can be found in Refs. [21,49,50,51] including electromagnetic probes such as e + e − or µ + µ − pairs [52,53] or real photons [54].…”

Section: Phsd @ Lhcmentioning

confidence: 99%

Impact of the initial size of spatial fluctuations on the collective flow in Pb–Pb collisions at $\sqrt{{{s}_{{\rm NN}}}}$ = 2.76 TeV

Konchakovski¹,

Cassing²,

Тонеев³

2015

J. Phys. G: Nucl. Part. Phys.

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Abstract. The Parton-Hadron-String-Dynamics (PHSD) transport model is used to study the influence of the initial size of spatial fluctuations of the interacting system on flow observables in Pb-Pb collisions at √ s N N = 2.76 TeV for different centralities. While the flow coefficients v 2 , v 3 , v 4 and v 5 are reasonably described in comparison to the data from the ALICE Collaboration for different centralities within the default setting, no essential sensitivity is found with respect to the initial size of spatial fluctuations even for very central collisions where the flow coefficients are dominated by the size of initial state fluctuations. We attribute this lack of sensitivity partly to the low interaction rate of the degrees-of-freedom in this very early phase of order ∼ 0.3 fm/c which is also in common with the weakly interacting color glass condensate (CGC) or glasma approach. Moreover, since the event shape in the transverse plane is approximately the same for different size of spatial fluctuations very similar eccentricities ǫ n are transformed to roughly the same flow coefficients v n in momentum space.PACS numbers: 24.85.+p, 12.38.Mh

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“…In the past, the PHSD transport model, based on temperature-dependent DQPM masses, widths, and cross sections [58], has successfully described numerous experimental data in relativistic heavy-ion collisions from the Alternating Gradient Synchrotron (AGS), Super-Proton Synchrotron (SPS), RHIC, and Large Hadron Collider (LHC) energies [56,57,[59][60][61][62][63][64].…”

Section: Introductionmentioning

confidence: 99%

Exploring the partonic phase at finite chemical potential within an extended off-shell transport approach

et al. 2019

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We extend the parton-hadron-string dynamics (PHSD) transport approach in the partonic sector by explicitly calculating the total and differential partonic scattering cross sections as a function of temperature T and baryon chemical potential µB on the basis of the effective propagators and couplings from the dynamical quasiparticle model (DQPM) that is matched to reproduce the equation of state of the partonic system above the deconfinement temperature Tc from lattice QCD. We calculate the collisional widths for the partonic degrees of freedom at finite T and µB in the timelike sector and conclude that the quasiparticle limit holds sufficiently well. Furthermore, the ratio of shear viscosity η over entropy density s, i.e., η/s, is evaluated using the collisional widths and compared to lattice QCD calculations for µB = 0 as well. We find that the novel ratio η/s does not differ very much from that calculated within the original DQPM on the basis of the Kubo formalism. Furthermore, there is only a very modest change of η/s with the baryon chemical µB as a function of the scaled temperature T /Tc(µB). This also holds for a variety of hadronic observables from central A + A collisions in the energy range 5 GeV ≤ √ sNN ≤ 200 GeV when implementing the differential cross sections into the PHSD approach. We only observe small differences in the antibaryon sector (p,Λ +Σ 0 ) at √ sNN = 17.3 GeV and 200 GeV with practically no sensitivity of rapidity and pT distributions to the µB dependence of the partonic cross sections. Small variations in the strangeness sector are obtained in all collisional systems studied (A + A and C + Au); however, it will be very hard to extract a robust signal experimentally. Since we find only small traces of a µB dependence in heavy-ion observables -although the effective partonic masses and widths as well as their partonic cross sections clearly depend on µB -this implies that one needs a sizable partonic density and large space-time QGP volume to explore the dynamics in the partonic phase. These conditions are only fulfilled at high bombarding energies where µB is, however, rather low. On the other hand, when decreasing the bombarding energy and thus increasing µB, the hadronic phase becomes dominant and accordingly it will be difficult to extract signals from the partonic dynamics based on "bulk" observables.

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Dilepton production in proton-proton and Pb+Pb collisions atsNN=2.76TeV

Cited by 41 publications

References 109 publications

Jet-dilepton conversion in expanding quark-gluon plasma

Jet-dilepton conversion in expanding quark-gluon plasma

Impact of the initial size of spatial fluctuations on the collective flow in Pb–Pb collisions at $\sqrt{{{s}_{{\rm NN}}}}$ = 2.76 TeV

Exploring the partonic phase at finite chemical potential within an extended off-shell transport approach

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