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Rafelski, Johann

doi:10.5506/aphyspolb.43.829

Cited by 9 publications

(10 citation statements)

References 2 publications

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“…Because the bare strange quark mass ∼ QCD , it is far from clear which limit applies, yet this is the crucial question determining whether N f /N c is an expansion parameter at all. The mass of the strange quark might well be the crucial qualitative uncertain driving factor in our results and hence fundamentally determine the nature of the QCD phase diagram [57,58]. would be the natural region to investigate for quarkyonic effects in experiment.…”

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confidence: 99%

Quarkyonic percolation and deconfinement at finite density and number of colors

Lottini

Torrieri

2013

Phys. Rev. C

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We examine the interplay between the percolation and the deconfinement phase transitions of Yang-Mills matter at finite temperature, quark chemical potential μ Q , and number of colors N c . We find that, whereas the critical N c for percolation goes down with density, the critical N c for confinement generally goes up. Because of this, Yang-Mills matter falls into two qualitatively different regimes: the "low-N c limit," where percolation does not occur because matter deconfines before it percolates, and the "high-N c limit," where there are three distinct phases-confined, deconfined, and confined but percolating matter-characterizing Yang-Mills matter at finite temperature and density. The latter can be thought of as the recently conjectured "quarkyonic phase." We attempt an estimate of the critical N c to see if the percolating phase can occur in our world. We find that, while percolation will not occur at normal nuclear density as in the large-N c limit, a sliver of the phase diagram in N c , energy density and baryonic density where percolation occurs while confinement persists is possible. We conclude by speculating on the phenomenological properties of such percolating "quarkyonic" matter and suggesting avenues by which to study it quantitatively and to look for it in experiment.

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confidence: 99%

Quarkyonic percolation and deconfinement at finite density and number of colors

Lottini

Torrieri

2013

Phys. Rev. C

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“…In a scenario, in which the st temperature where the HRG and lattice agree is indicating a "deconfinement" or way. First results from ALICE indicate that the T ch of strange hadrons is about 16 MeV higher than that of light hadrons (164 vs 148 MeV) [7,8]. As in the case of the lattice parameters, this sensitivity to the freeze-out temperature, extracted from a statistical hadronization fit, is most pronounced for the multi-strange baryons.…”

Section: Introductionmentioning

confidence: 99%

“…In a QGP, strangeness can be easily produced as strange-antistrange quark pairs via gluon-gluon or quark-antiquark fusion [7], where the minimum momentum transfer Q for this e-mail: tlusty@rice.edu process is Q ≈ 200 MeV, while the lowest Q process in a hadron gas, n + n −→ n + Λ + K, needs 670 MeV. Strangeness is also abundant since nearly 20% of all energy content of QGP is transferred to the production of strangeness when chemical equilibrium is reached [8].…”

Section: Introductionmentioning

confidence: 99%

Strangeness at Intermediate Baryon Density

Tlusty

2018

EPJ Web Conf.

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Abstract.Exploration of the QCD phase diagram has been one of the main programs of contemporary nuclear physics. The intermediate baryon density region covers a broad range of the baryon chemical potential, between 100 and 700 MeV, and is expected to include a possible critial point at the end of a phase equilibrium curve between the hadron gas and quark gluon plasma phases. Experimental programs at the SPS and RHIC facilities have provided valuable insights in this range. These proceedings motivate the exploration of the QCD phase diagram through the use of strangeness. A selection of relevant experimental results from RHIC and SPS beam energy scan programs with associated theoretical predictions is presented along with a discussion of possible physical conclusions and future plans.

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“…By considering time scales shorter than the weak relaxation time τ weak , we thus simplify the analysis to the presence of only light-flavored quarks and corresponding hadrons. This simplification would not apply if the temperature is of the order the mass of strange quark m s ∼ 95 ± 5 MeV and gluonic degrees of freedom are also liberated in the transition, because in this case strangeness could achieve chemical equilibrium on QCD time scales by the same mechanism as in low-density QGP [14,15].…”

Section: Nuclear Matter At the Onset Of Collisionmentioning

confidence: 99%

“…This possibility has been invoked before as the basis of a model to explain sGRBs [13]. Different processes are important in the new phase, and among them we may find a phenomenon characteristic of the transition having occurred, just as enhancement of strange-flavored baryons is an important signal of the creation of quark-gluon plasma (QGP) in laboratory experiments [14,15].…”

Section: Introductionmentioning

confidence: 99%

Electromagnetic signal of the QCD phase transition in neutron star mergers

Chen

Labun

2013

Phys. Rev. D

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Mergers of binary neutron stars create conditions of supranuclear density n nnuc ≃ 0.17 fm −3 and moderate temperature 50 T 90 MeV. These events thus probe a sensitive region of the density-temperature phase diagram of QCD matter. We study photon production by the QCD conformal anomaly for a signal of a possible transition to quark degrees of freedom during the merger. We discuss energy loss due to photon radiation as a cooling mechanism that is sensitive to the bulk viscosity and thermal conductivity of the quark matter.

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Abstract: A general overview of the results obtained by the ALICE experiment from the analysis of the Pb-Pb data sample collected at the end of 2010 during the first heavy-ion run at the LHC is presented.

Cited by 9 publications

References 2 publications

Quarkyonic percolation and deconfinement at finite density and number of colors

Quarkyonic percolation and deconfinement at finite density and number of colors

Strangeness at Intermediate Baryon Density

Electromagnetic signal of the QCD phase transition in neutron star mergers

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