The extent of strangeness equilibration in quark gluon plasma

Pal, Dipali; Sen, Abhijit; Mustafa, Munshi G.; Srivastava, D. K.

doi:10.1007/bf02707035

Cited by 2 publications

(8 citation statements)

References 7 publications

(12 reference statements)

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“…Temperature, chemical potential and non-equilibrium fugacity variations with RHIC initial conditions are given in figure 1 while that for LHC are given in figure 2. As reported in all previous works [5][6][7][8][9][10]18] the QGP remains far away from full chemical equilibration.…”

Section: Observed Trendsmentioning

confidence: 51%

“…where as in earlier works [8,10,11] we have introduced rates R 2i and R 3 for the rates in (7) above. We shall look more closely at these rates soon.…”

Section: Parton Equilibration Equationsmentioning

confidence: 96%

“…Alternatively, as an approximation, a temperature-independent value of 0.3 could also be used for the strong coupling constant α s . Using standard techniques [5,6,8,11] we can obtain the following result for the mean free path λ f :…”

Section: Parton Equilibration Ratesmentioning

confidence: 98%

“…Of these, the first is the usual Bose distribution function [8], the second is the modified Fermi-Dirac-type distribution function with an exponential term in the numerator to include the light quark chemical potential [5] and the third is the usual modified Fermi-Dirac distribution function for the massive strange quark [8], each being scaled by the non-equilibrium fugacity in order to describe the degree of equilibrium achieved for a chemically equilibrating system.…”

Section: Basic Thermodynamics Of the Systemmentioning

confidence: 99%

“…The present work is in a similar line, but with the following points of difference: (1) we explicitly include the finite strange quark mass, (2) We maintain the quarkantiquark distinction, (3) we use results of full phase space calculations for the pair production and flavour changing processes in contrast with the factorized rates of many earlier works [5][6][7][8][9][10], (4) for a given initial baryon number density we iterate to obtain the initial value of the quark chemical potential which again evolves obeying the baryon number conservation equation and (5) we study comparatively the degree of equilibration achieved for varying initial conditions.…”

Section: Introductionmentioning

confidence: 98%

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Flavour equilibration studies of quark-gluon plasma with non-zero baryon density

Sen

2009

Pramana - J Phys

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Flavour equilibration for a thermally equilibrated but chemically nonequilibrated quark-gluon plasma is presented. Flavour equilibration is studied enforcing baryon number conservation. In addition to the usual processes like single additional gluon production gg ggg and its reverse and quark-antiquark pair production by gluon pair fusion gg q iqī and reverse thereof, processes like quark-flavour interchanging qiqī qjqj is also considered. The degree of equilibration is studied comparatively for various reactions/constraints that are being considered.

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Section: Observed Trendsmentioning

confidence: 51%

“…where as in earlier works [8,10,11] we have introduced rates R 2i and R 3 for the rates in (7) above. We shall look more closely at these rates soon.…”

Section: Parton Equilibration Equationsmentioning

confidence: 96%

Section: Parton Equilibration Ratesmentioning

confidence: 98%

Section: Basic Thermodynamics Of the Systemmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 98%

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Flavour equilibration studies of quark-gluon plasma with non-zero baryon density

Sen

2009

Pramana - J Phys

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Initial temperature and extent of chemical equilibration of partons in relativistic collisions of heavy nuclei

Srivastava

Chatterjee

Mustafa

2017

J. Phys. G: Nucl. Part. Phys.

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We emphasize that a knowledge of energy and entropy densities of quark gluon plasma -a thermalized de-confined matter, formed in relativistic heavy ion collisions fixes the formation temperature and the product of gluon fugacity and formation time uniquely, provided we know the relative fugacities of quarks and gluons. This also provides that a smaller formation time would imply larger fugacities for partons. Next we explore the limits of chemical equilibration of partons during the initial stages in relativistic collision of heavy nuclei. The experimentally measured rapidity densities of transverse energy and charged particle multiplicity at RHIC and LHC energies are used to estimate the energy and number densities with the assumption of formation of a thermally equilibrated quark gluon plasma which may be chemically equilibrated to the same or differing extents for quarks and gluons. The estimates are found to be very sensitive to the correction factor used for the Björken energy density for identifying it with the initial energy density. The extent of chemical equilibration near the end of the QGP phase is inferred by solving master equations by including the processes gg ↔ ggg and gg ↔ qq along with expansion and cooling of the plasma. The possible consequences for invariant mass distribution of intermediate mass dileptons radiated from the plasma are discussed which could distinguish between different scenarios.

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The extent of strangeness equilibration in quark gluon plasma

Cited by 2 publications

References 7 publications

Flavour equilibration studies of quark-gluon plasma with non-zero baryon density

Flavour equilibration studies of quark-gluon plasma with non-zero baryon density

Initial temperature and extent of chemical equilibration of partons in relativistic collisions of heavy nuclei

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