Transverse momentum spectra of dileptons measured by the NA60 Collaboration in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mi mathvariant="normal">In</mml:mi><mml:mo>+</mml:mo><mml:mi mathvariant="normal">In</mml:mi></mml:mrow></mml:math>collisions at 158 GeV/nucleon

Dusling, Kevin; Zahed, Ismaïl

doi:10.1103/physrevc.80.014902

Cited by 20 publications

(24 citation statements)

References 20 publications

(19 reference statements)

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“…Although the contribution from the vacuum decay of ρ mesons at thermal freeze out to the total dilpeton yield is small compared with that from the in-medium decay, which is included in the present study via the pion-pion annihilation, it can become important for dileptons of high transverse momenta as a result of the large radial flow at thermal freeze out [28]. This contribution to the differential yield of dilepton is given by [28] …”

Section: B Dilepton Emission From Vacuum Decay Of ρ Mesonsmentioning

confidence: 85%

“…[30,31] for the ideal hydrodynamics. Results from our study will be relevant to the physics of dilepton transverse momentum spectra [26][27][28] that have been intensively discussed during the past few years following the publication of experimental data from heavy ion collisions at the SPS by the NA60 Collaboration [29]. This paper is organized as follows: In Sec.…”

Section: Introductionmentioning

confidence: 99%

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Dilepton production in schematic causal viscous hydrodynamics

Song

Han

2011

Phys. Rev. C

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Assuming that in the hot dense matter produced in relativistic heavy-ion collisions, the energy density, entropy density, and pressure as well as the azimuthal and space-time rapidity components of the shear tensor are uniform in the direction transversal to the reaction plane, we derive a set of schematic equations from the Isreal-Stewart causal viscous hydrodynamics. These equations are then used to describe the evolution dynamics of relativistic heavy-ion collisions by taking the shear viscosity to entropy density ratio of 1/4π for the initial quark-gluon plasma (QGP) phase and of ten times this value for the later hadron-gas (HG) phase. Using the production rate evaluated with particle distributions that take into account the viscous effect, we study dilepton production in central heavy-ion collisions. Compared with results from the ideal hydrodynamics, we find that although the dilepton invariant mass spectra from the two approaches are similar, the transverse momentum spectra are significantly enhanced at high transverse momenta by the viscous effect. We also study the transverse momentum dependence of dileptons produced from QGP for a fixed transverse mass which is essentially absent in the ideal hydrodynamics, and find that this so-called transverse mass scaling is violated in the viscous hydrodynamics, particularly at high transverse momenta.

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Section: B Dilepton Emission From Vacuum Decay Of ρ Mesonsmentioning

confidence: 85%

Section: Introductionmentioning

confidence: 99%

Dilepton production in schematic causal viscous hydrodynamics

Song

Han

2011

Phys. Rev. C

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“…The acceptance corrected invariant mass spectrum of excess dileptons measured by the NA60 collaboration [325,326,328] is shown in Fig. 22 together with theoretical calculations by various groups [323,329,330]. The excess spectrum is obtained by subtracting the contributions from long lived sources, such as η and ω-Dalitz decays, direct decays of ω and φ, as well as open charm and Drell-Yan pairs [328].…”

Section: Dilepton Productionmentioning

confidence: 99%

Properties of hot and dense matter from relativistic heavy ion collisions

et al. 2016

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a b s t r a c tWe review the progress achieved in extracting the properties of hot and dense matter from relativistic heavy ion collisions at the relativistic heavy ion collider (RHIC) at Brookhaven National Laboratory and the large hadron collider (LHC) at CERN. We focus on bulk properties of the medium, in particular the evidence for thermalization, aspects of the equation of state, transport properties, as well as fluctuations and correlations. We also discuss the in-medium properties of hadrons with light and heavy quarks, and measurements of dileptons and quarkonia. This review is dedicated to the memory of Gerald E. Brown.

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“…The rates are then integrated over the space-time volume following the same procedure as in Refs. [24,25]. Table I shows the parameters used for the SPS, RHIC, and LHC.…”

Section: Spectra In Ultrarelativistic Heavy-ion Collisionsmentioning

confidence: 99%

Thermal photons from heavy ion collisions: A spectral function approach

Dusling

Zahed

2010

Phys. Rev. C

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We analyze the photon rates from a hadronic gas in equilibrium using chiral reduction formulas and a density expansion. The chiral reduction is carried to second order in the pion density which in principal includes all kinetic processes of the type $X\to \pi\gamma$ and $X\to \pi\pi\gamma$. The resulting rates are encoded in the form of vacuum correlation functions which are amenable to experiment. The hadronic rates computed in this work along with the known perturbative QGP rates are integrated over the space-time evolution of a hydrodynamic model tuned to hadronic observables. The resulting yields are compared to the recent photon and low mass dilepton measurements at the SPS and RHIC. Predictions for the LHC are made

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Transverse momentum spectra of dileptons measured by the NA60 Collaboration inIn+Incollisions at 158 GeV/nucleon

Cited by 20 publications

References 20 publications

Dilepton production in schematic causal viscous hydrodynamics

Dilepton production in schematic causal viscous hydrodynamics

Properties of hot and dense matter from relativistic heavy ion collisions

Thermal photons from heavy ion collisions: A spectral function approach

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