Dileptons and Chiral Symmetry Restoration

Hohler, Paul M.; Rapp, Ralf

doi:10.1016/j.nuclphysbps.2016.05.057

Cited by 2 publications

(2 citation statements)

References 26 publications

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“…At lower, as well as at higher energies this approximation breaks down, and the dynamics would involve a plethora of processes hardly describable in QCD. Intermediate energy models of various kinds have been invoked to account for the data in those regions, with varying degrees of success (for a recent review see [79]).…”

Section: Im π|mentioning

confidence: 99%

Finite Temperature QCD Sum Rules: A Review

Ayala

Domínguez

Loewe

2017

Advances in High Energy Physics

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The method of QCD sum rules at finite temperature is reviewed, with emphasis on recent results. These include predictions for the survival of charmonium and bottonium states, at and beyond the critical temperature for de-confinement, as later confirmed by lattice QCD simulations. Also included are determinations in the light-quark vector and axial-vector channels, allowing to analyse the Weinberg sum rules, and predict the dimuon spectrum in heavy ion collisions in the region of the rho-meson. Also in this sector, the determination of the temperature behaviour of the up-down quark mass, together with the pion decay constant, will be described. Finally, an extension of the QCD sum rule method to incorporate finite baryon chemical potential is reviewed.

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Section: Im π|mentioning

confidence: 99%

Finite Temperature QCD Sum Rules: A Review

Ayala

Domínguez

Loewe

2017

Advances in High Energy Physics

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“…Due to their penetrating nature and the large variety of processes in which they are created, they provide information on the early temperature of the fireball, in-medium properties of vector mesons, lifetime of the fireball, baryon density due to coupling to baryonic resonances and possibly chiral symmetry restauration. In CBM, particular emphasis will be put on measuring dilepton rates in the mass range beyond 1 GeV/c 2 as this allows to directly access the fireball temperature [22] and a contribution from ρ-a 1 chiral mixing [23]. Figure 2 highlights the discovery potential connected to this measurement.…”

Section: Dileptonsmentioning

confidence: 99%

The Compressed Baryonic Matter experiment at FAIR

Höhne

2018

EPJ Web Conf.

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Abstract.The CBM experiment will investigate highly compressed baryonic matter created in A+A collisions at the new FAIR research center. With a beam energy range up to 11 AGeV for the heaviest nuclei at the SIS 100 accelerator, CBM will investigate the QCD phase diagram in the intermediate range, i.e. at moderate temperatures but high net-baryon densities. This intermediate range of the QCD phase diagram is of particular interest, because a first order phase transition ending in a critical point and possibly new highdensity phases of strongly interacting matter are expected. In this range of the QCD phase diagram only exploratory measurements have been performed so far. CBM, as a next generation, high-luminosity experiment, will substantially improve our knowledge of matter created in this region of the QCD phase diagram and characterize its properties by measuring rare probes such as multi-strange hyperons, dileptons or charm, but also with event-by-event fluctuations of conserved quantities, and collective flow of identified particles. The experimental preparations with special focus on hadronic observables and strangeness is presented in terms of detector development, feasibility studies and fast track reconstruction. Preparations are progressing well such that CBM will be ready with FAIR start. As quite some detectors are ready before, they will be used as upgrades or extensions of already running experiments allowing for a rich physics program prior to FAIR start. Mapping the high density region of the QCD phase diagram with CBMHeavy ion experiments at relativistic energies are the experimental tool in order to map the conjectured QCD phase diagram, see figure 1 (left), which is of fundamental interest for understanding the strong interaction and strongly interacting matter in particular in the non-perturbative regime. In dependence on the collision energy strongly interacting matter of varying temperature and baryon chemical potential is created. The exploration of matter at high temperatures but low baryon chemical potential in heavy-ion collisions at the highest energies at RHIC and LHC [1,3] reveals insight into the characteristics of the quark-gluon plasma and the phase transition to hadronic matter. Experimental results can be compared to lattice QCD calculations at µ B = 0 which predict a crossover from partonic to hadronic matter at temperatures around 160 MeV [4] in accordance to experimental findings. According to lattice QCD, the phase transition is driven by the energy density and occurs at a critical density on the order of 1 GeV/fm 3 . At large baryon densities the QCD phase diagram is uncharted territory as lattice calculations are not applicable, and as only few experimental measurements mainly of bulk

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Dileptons and Chiral Symmetry Restoration

Cited by 2 publications

References 26 publications

Finite Temperature QCD Sum Rules: A Review

Finite Temperature QCD Sum Rules: A Review

The Compressed Baryonic Matter experiment at FAIR

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