The cool potential of gluons

Peshier, A.; Giovannoni, Dino

doi:10.1088/1742-6596/668/1/012076

Cited by 5 publications

(4 citation statements)

References 6 publications

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“…related to isospin, strangeness, electric charge etc., complicates the picture. Transient states related to under saturated or over saturated gluons [75] or under saturated quark state occupation [76] give rise to many interesting phenomena beyond our discussion.…”

Section: Conclusion and Summarymentioning

confidence: 99%

Arguing on Entropic and Enthalpic First-Order Phase Transitions in Strongly Interacting Matter

Wunderlich¹,

Yaresko²,

Kämpfer³

2016

JMP

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The pattern of isentropes in the vicinity of a first-order phase transition is proposed as a key for a sub-classification. While the confinement-deconfinement transition, conjectured to set in beyond a critical end point in the QCD phase diagram, is often related to an entropic transition and the apparently settled gas-liquid transition in nuclear matter is an enthalphic transition, the conceivable local isentropes w.r.t. "incoming" or "outgoing" serve as another useful guide for discussing possible implications, both in the presumed hydrodynamical expansion stage of heavy-ion collisions and the core-collapse of supernova explosions. Examples, such as the quark-meson model and two-phase models, are shown to distinguish concisely the different transitions.

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Section: Conclusion and Summarymentioning

confidence: 99%

Arguing on Entropic and Enthalpic First-Order Phase Transitions in Strongly Interacting Matter

Wunderlich¹,

Yaresko²,

Kämpfer³

2016

JMP

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“…Particularly, expressions (96) do not contain terms ∝ 1/δn G . Nevertheless, if we substitute expressions (96) in the definitions (38) and (41), we obtain…”

Section: B Variances and Cross-variances Of The Particle Numbermentioning

confidence: 99%

“…The BEC can also occur because of an additional injection of non-equilibrium pions from resonance decays [35], decomposition of a blurred phase of hot baryon-poor and pion enriched matter existing before the chemical freezeout [36], sudden hadronization of supercooled quarkgluon plasma [37], and a decay of the transient Bose-Einstein condensate of gluons or glueballs pre-formed at an initial stage in a heavy-ion collision, cf. [38][39][40][41][42]. Reference [34] demonstrated that before the formation of the Bose-Einstein condensate the initially non-equilibrium interacting pion gas in ultrarelativistic heavy-ion collisions should pass several stages including a wave-turbulence stage.…”

Section: Introductionmentioning

confidence: 99%

Fluctuations in non-ideal pion gas with dynamically fixed particle number

Kolomeitsev

Voskresensky

2018

Nuclear Physics A

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We study the behavior of the non-ideal pion gas with the dynamically fixed number of particles, formed on an intermediate stage in ultra-relativistic heavy-ion collisions. The pion spectrum is calculated within the self-consistent Hartree approximation. General expressions are derived for cross-covariances of the number of various particle species in the pion gas of an arbitrary isospin composition. The behavior of the cross-variances is analyzed for the temperature approaching from above the maximal critical temperature of the Bose-Einstein condensation for the pion species a = ±, 0, i.e. for T > max T a cr . It is shown that in case of the system with equal averaged numbers of isospin species, the variance of the charge, Q = N+ − N−, diverges at T → Tcr = T a cr , whereas variances of the total particle number, N = N+ + N− + N0, and of a relative abundance of charged and neutral pions, G = (N+ + N−)/2 − N0, remain finite in the critical point. Then fluctuations are studied in the pion gas with small isospin imbalance 0 < |G| ≪ N and 0 < |Q| ≪ N and shifts of the effective masses, chemical potentials and values of critical temperatures are calculated for various pion species, and the highest critical temperature, maxT a cr is found, above which the pion system exists in the non-condensed phase. Various pion cross variances are calculated for T > maxT a cr , which prove to be strongly dependent on the isospin composition of the system, whereas the variances of N and G are found to be independent on the isospin imbalance up to the term linear in G/N and Q/N .

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“…Non-equilibrium supercooling effects [10][11][12], decays of resonances [13], or a decay of the transient BEC of gluons or glueballs pre-formed at an initial stage in a heavy-ion collision, cf. [14][15][16][17][18] may provide effective mechanisms to drive the pion system to the Bose-Einstein condensation (BEC). Reference [10] studied a possibility of the pion BEC in the interacting relativistic pion gas with a λϕ 4 interaction under the assumption that the number of pions created in the course of ultrarelativistic heavy-ion collisions is (dynamically) fixed in the time interval between the chemical and thermal freeze-outs.…”

Section: Introductionmentioning

confidence: 99%

Particle number fluctuations in a non-ideal pion gas

2018

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We consider a non-ideal hot pion gas with the dynamically fixed number of particles in the model with the λφ4 interaction. The effective Lagrangian for the description of such a system is obtained by dropping the terms responsible for the change of the total particle number. Within the self-consistent Hartree approximation, we compute the effective pion mass, thermodynamic characteristics of the system and identify a critical point of the induced Bose-Einstein condensation when the pion chemical potential reaches the value of the effective pion mass. The normalized variance, skewness, and kurtosis of the particle number distributions are calculated. We demonstrate that all these characteristics remain finite at the critical point of the Bose-Einstein condensation. This is due to the non-perturbative account of the interaction and is in contrast to the ideal-gas case.

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The cool potential of gluons

Cited by 5 publications

References 6 publications

Arguing on Entropic and Enthalpic First-Order Phase Transitions in Strongly Interacting Matter

Arguing on Entropic and Enthalpic First-Order Phase Transitions in Strongly Interacting Matter

Fluctuations in non-ideal pion gas with dynamically fixed particle number

Particle number fluctuations in a non-ideal pion gas

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