Massive Yang–Mills for vector and axial-vector spectral functions at finite temperature

Hohler, Paul M.; Rapp, Ralf

doi:10.1016/j.aop.2016.01.018

Cited by 18 publications

(14 citation statements)

References 56 publications

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“…The authors of Ref. [161] studied the temperature progression of the ρ and a 1 meson spectral functions towards chiral mixing in a pion gas and found a drop of 15-20% in the chiral condensate at T 160 MeV, corroborating the idea that the degeneracy in the spectral functions is coupled to chiral symmetry restoration.…”

Section: Transport Properties and Electromagnetic Probes Of Qcd Mattermentioning

confidence: 79%

Lattice QCD and heavy ion collisions: a review of recent progress

2018

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In the last few years, numerical simulations of Quantum chromodynamics on the lattice have reached a new level of accuracy. A wide range of thermodynamic quantities is now available in the continuum limit and for physical quark masses. This allows a comparison with measurements from heavy ion collisions for the first time. Furthermore, calculations of dynamical quantities are also becoming available. The combined effort from first principles and experiment allows us to gain an unprecedented understanding of the properties of quark-gluon plasma. I will review the state-of-the-art results from lattice simulations and connect them to the experimental information from the relativistic heavy ion collider and the large hadron collider.

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Section: Transport Properties and Electromagnetic Probes Of Qcd Mattermentioning

confidence: 79%

Lattice QCD and heavy ion collisions: a review of recent progress

2018

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“…It would therefore be interesting to compare and contrast our nonperturbative predictions with model approaches, such as those discussed in Refs. [58][59][60][61][62][63][64][65][66], to reach further insight and understanding.…”

Section: Resultsmentioning

confidence: 99%

Light baryons below and above the deconfinement transition: medium effects and parity doubling

Aarts

Allton

Boni

et al. 2017

J. High Energ. Phys.

103

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Abstract:We study what happens to the N , ∆ and Ω baryons in the hadronic gas and the quark-gluon plasma, with particular interest in parity doubling and its emergence as the plasma is heated. This is done using simulations of lattice QCD, employing the FASTSUM anisotropic N f = 2 + 1 ensembles, with four temperatures below and four above the deconfinement transition temperature. Below T c we find that the positive-parity groundstate masses are largely temperature independent, whereas the negative-parity ones are reduced considerably as the temperature increases. This may be of interest for heavyion phenomenology. Close to the transition, the masses are nearly degenerate, in line with the expectation from chiral symmetry restoration. Above T c we find a clear signal of parity doubling in all three channels, with the effect of the heavier s quark visible.

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“…Chiral symmetry on the other hand requires one to study the ρ alongside with its chiral partner, the a 1 meson. From the in-medium modifications to the spectral functions of vector and axial-vector mesons one then hopes to deduce the nature of chiral symmetry restoration and to find evidence of an associated critical endpoint in the phase diagram of QCD [6,[11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Fluctuating vector mesons in analytically continued functional RG flow equations

Jung

Smekal

2019

Phys. Rev. D

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In this work we study contributions due to vector and axial-vector meson fluctuations to their in-medium spectral functions in an effective low-energy theory inspired by the gauged linear sigma model. In particular, we show how to describe these fluctuations in the effective theory by massive (axial-)vector fields in agreement with the known structure of analogous single-particle or resonance contributions to the corresponding conserved currents. The vector and axial-vector meson spectral functions are then computed by numerically solving the analytically continued functional renormalization group (aFRG) flow equations for their retarded two-point functions at finite temperature and density in the effective theory. We identify the new contributions that arise due to the (axial-)vector meson fluctuations, and assess their influence on possible signatures of a QCD critical endpoint and the restoration of chiral symmetry in thermal dilepton spectra.

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Massive Yang–Mills for vector and axial-vector spectral functions at finite temperature

Cited by 18 publications

References 56 publications

Lattice QCD and heavy ion collisions: a review of recent progress

Lattice QCD and heavy ion collisions: a review of recent progress

Light baryons below and above the deconfinement transition: medium effects and parity doubling

Fluctuating vector mesons in analytically continued functional RG flow equations

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