Seeing phi mesons through dileptons

Chung, W.; Ko, Che Ming; Li, G.Q.

doi:10.1016/s0375-9474(98)00473-4

Cited by 16 publications

(9 citation statements)

References 114 publications

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“…The viscous effect can further affect dilepton production in relativistic heavy-ion collisions, which has been suggested as a possible tool to probe the properties of quark-gluon plasma [11][12][13][14][15][16] as well as those of hot dense hadronic matter [17][18][19][20][21][22][23]. As shown in Ref.…”

Section: Introductionmentioning

confidence: 99%

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: Introductionmentioning

confidence: 99%

Dilepton production in schematic causal viscous hydrodynamics

Song

Han

2011

Phys. Rev. C

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“…(28). It restores that the Noether expressions (29) are indeed the exactly conserved quantities. In this compensation we see the essential role of the fluctuation term in the generalized kinetic equation.…”

Section: Conservations Of the Current And Energy-momentummentioning

confidence: 57%

Transport dynamics of broad resonances

Knoll¹,

Darmstadt²

1999

Progress in Particle and Nuclear Physics

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The propagation of short life time particles with consequently broad mass width are discussed in the context of transport descriptions. In the first part some known properties of finite life time particles such as resonances are reviewed and discussed at the example of the ρ-meson. Grave deficiencies in some of the transport treatment of broad resonances are disclosed and quantified. The second part addresses the derivation of transport equations which permit to account for the damping width of the particles. Baym's Φ-derivable method is used to derive a self-consistent and conserving scheme, which fulfils detailed balance relations even in the case of particles with broad mass distributions. For this scheme a conserved energy-momentum tensor can be constructed. Furthermore, a kinetic entropy can be derived which besides the standard quasi-particle part also includes contributions from fluctuations. * E is the relative c.m. energy and correspondingly the momentum in A vanishes; κ = 1 for non-rel. particles; κ = 2 for relativistic bosons, where Γ(E)/2E equals the energy dependent decay width and E 2 R (E) = m 2 R + p 2 + Re Σ(p).

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“…According to Ref. [45], including medium effects would lead to a broadening of dilepton invariance spectrum near phi meson peak due to the increase in its decay width as well as a shoulder structure below the bare phi meson mass as a result of the dropping phi meson in-medium mass. Also, it was shown in Ref.…”

Section: Discussionmentioning

confidence: 99%

Resonances from AMPT

Ko¹

2012

EPJ Web of Conferences

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Abstract.A multiphase transport (AMPT) model that includes both initial partonic and nal hadron rescattering effects in relativistic heavy ion collisions is brie y reviewed. Particular attention is given to the scattering processes in the hadronic phase in order to address resonances production in these collisions. As an example, phi meson production is discussed in detail through both its dikaon and dilepton decay channels. Results from the AMPT model for heavy ion collisions at both SPS and RHIC are compared to the experimental data to extract information on the production mechanism and in-medium properties of the phi meson.

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Seeing phi mesons through dileptons

Cited by 16 publications

References 114 publications

Dilepton production in schematic causal viscous hydrodynamics

Dilepton production in schematic causal viscous hydrodynamics

Transport dynamics of broad resonances

Resonances from AMPT

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