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Fromerth, Michael J.; Kuznetsova, Inga; Labun, Lance; Letessier, Jean; Rafelski, Johann

doi:10.5506/aphyspolb.43.2261

Cited by 31 publications

(43 citation statements)

References 8 publications

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“…al. [20], a large number of pions and muons remain in the plasma at least till 10 MeV. So even in the absence of inhomogeneities, a significant number density of muons (about 10 38 particles/cm 3 ) already existed in the plasma.…”

Section: Baryon Overdensities and Diffusion Coefficients 21 Generatimentioning

confidence: 99%

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Diffusion coefficients and constraints on hadronic inhomogeneities in the early universe

Bhattacharya

Sanyal

2019

Eur. Phys. J. C

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Hadronic inhomogeneities are formed after the quark hadron phase transition. The nature of the phase transition dictates the nature of the inhomogeneities formed. Recently some scenarios of inhomogeneities have been discussed where the strange quarks are in excess over the up and down quarks. The hadronization of these quarks will give rise to a large density of hyperons and kaons in addition to the protons and neutrons which are formed after the phase transition. These unstable hyperons decay into pions, muons and their respective neutrinos. Hence the plasma during this period consists of neutrons, protons, electrons, muons and neutrinos. Due to the decay of the hyperons, the muon component of the inhomogeneities will be very high. We study the diffusion of neutrons and protons in the presence of a large number of muons immediately after the quark hadron phase transition. We find that the presence of the muons enhances the diffusion coefficient of the neutrons/protons. As the diffusion coefficient is enhanced, the inhomogeneities will decay faster in the regions where the muon density is higher. Hence smaller muon rich inhomogeneities will be completely wiped out. The decay of the hyperons will also generate muon neutrinos. Since the big bang nucleosynthesis provides constraints on the neutrino degeneracies, we revisit the effect of non zero degeneracies on the primordial elements.

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Section: Baryon Overdensities and Diffusion Coefficients 21 Generatimentioning

confidence: 99%

“…A detailed overview of this hadronization process is given in ref. [20]. We mention only a few points about these models which are important for the calculation of number densities for the diffusion coefficients.…”

Section: Baryon Overdensities and Diffusion Coefficients 21 Generatimentioning

confidence: 99%

Diffusion coefficients and constraints on hadronic inhomogeneities in the early universe

Bhattacharya

Sanyal

2019

Eur. Phys. J. C

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“…In the end I through up my arms. Our valuable set of insights remained unpublished -a decade later some of the material was embedded into a longer conference report [147]. Referee A .…”

Section: Epilogue: Using Qgpmentioning

confidence: 99%

Discovery of Quark-Gluon Plasma: Strangeness Diaries

Rafelski

2020

Eur. Phys. J. Spec. Top.

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We look from a theoretical perspective at the new phase of matter, quark-gluon plasma (QGP), the new form of nuclear matter created at high temperature and pressure. Here I retrace the path to QGP discovery and its exploration in terms of strangeness production and strange particle signatures. We will see the theoretical arguments that have been advanced to create interest in this determining signature of QGP. We explore the procedure used by several experimental groups making strangeness production an important tool in the search and discovery of this primordial state of matter present in the Universe before matter in its present form was formed. We close by looking at both the ongoing research that increases the reach of this observable to LHC energy scale pp collisions, and propose an interpretation of these unexpected results.

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“…Evidence has been presented that high-energy heavyion collisions form a dense, nearly perfect, stronglyinteracting, deconfined partonic liquid called quark-gluon plasma (QGP) [1][2][3][4]. This state of matter is thought to have dominated the universe prior to the hadron epoch [5]. Quantifying the properties of the QGP is necessary for describing the QCD phase diagram [6], as well as constraining parameters in cosmological models that describe the evolution of the universe along a trajectory through the QCD phase diagram [7].…”

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confidence: 99%

Beam Energy Dependence of Jet-Quenching Effects in Au+Au Collisions at sNN=7.7
Adamczyk¹,
Lebedev²,
Srivastava³
et al. 2018
Phys. Rev. Lett.
48
0
27
0
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We report measurements of the nuclear modification factor R_{CP} for charged hadrons as well as identified π^{+(-)}, K^{+(-)}, and p(p[over ¯]) for Au+Au collision energies of sqrt[s_{NN}]=7.7, 11.5, 14.5, 19.6, 27, 39, and 62.4 GeV. We observe a clear high-p_{T} net suppression in central collisions at 62.4 GeV for charged hadrons which evolves smoothly to a large net enhancement at lower energies. This trend is driven by the evolution of the pion spectra but is also very similar for the kaon spectra. While the magnitude of the proton R_{CP} at high p_{T} does depend on the collision energy, neither the proton nor the antiproton R_{CP} at high p_{T} exhibit net suppression at any energy. A study of how the binary collision-scaled high-p_{T} yield evolves with centrality reveals a nonmonotonic shape that is consistent with the idea that jet quenching is increasing faster than the combined phenomena that lead to enhancement.

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Untitled

Cited by 31 publications

References 8 publications

Diffusion coefficients and constraints on hadronic inhomogeneities in the early universe

Diffusion coefficients and constraints on hadronic inhomogeneities in the early universe

Discovery of Quark-Gluon Plasma: Strangeness Diaries

Beam Energy Dependence of Jet-Quenching Effects in Au+Au Collisions at sNN=7.7
Adamczyk¹,
Lebedev²,
Srivastava³
et al. 2018
Phys. Rev. Lett.
48
0
27
0
View full text Add to dashboard Cite

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Untitled

Cited by 31 publications

References 8 publications

Diffusion coefficients and constraints on hadronic inhomogeneities in the early universe

Diffusion coefficients and constraints on hadronic inhomogeneities in the early universe

Discovery of Quark-Gluon Plasma: Strangeness Diaries

Beam Energy Dependence of Jet-Quenching Effects in Au+Au Collisions at sNN=7.7Adamczyk1, Lebedev2, Srivastava3 et al. 2018Phys. Rev. Lett.480270View full textAdd to dashboardCite

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Beam Energy Dependence of Jet-Quenching Effects in Au+Au Collisions at sNN=7.7
Adamczyk¹,
Lebedev²,
Srivastava³
et al. 2018
Phys. Rev. Lett.
48
0
27
0
View full text Add to dashboard Cite