# Baryon Density

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### Dinesh K. Srivastava – One of the best experts on this subject based on the ideXlab platform.

• ##### Net BaryonDensity inAu+AuCollisions at the Relativistic Heavy Ion Collider
Physical Review Letters, 2003
Co-Authors: Steffen A. Bass, Berndt Müller, Dinesh K. Srivastava

Abstract:

We calculate the net-Baryon rapidity distribution in $\mathrm{A}\mathrm{u}+\mathrm{A}\mathrm{u}$ collisions at the Relativistic Heavy Ion Collider (RHIC) in the framework of the parton cascade model (PCM). Parton rescattering and fragmentation leads to a substantial increase in the net-Baryon Density at midrapidity over the Density produced by initial primary parton-parton scatterings. The PCM is able to describe the measured net-Baryon Density at RHIC.

• ##### net BaryonDensity in au au collisions at the relativistic heavy ion collider
Physical Review Letters, 2003
Co-Authors: Steffen A. Bass, Dinesh K. Srivastava, Berndt Müller

Abstract:

We calculate the net-Baryon rapidity distribution in $\mathrm{A}\mathrm{u}+\mathrm{A}\mathrm{u}$ collisions at the Relativistic Heavy Ion Collider (RHIC) in the framework of the parton cascade model (PCM). Parton rescattering and fragmentation leads to a substantial increase in the net-Baryon Density at midrapidity over the Density produced by initial primary parton-parton scatterings. The PCM is able to describe the measured net-Baryon Density at RHIC.

### K G Klimenko – One of the best experts on this subject based on the ideXlab platform.

• ##### pion condensation in electrically neutral cold matter with finite BaryonDensity
European Physical Journal C, 2006
Co-Authors: D Ebert, K G Klimenko

Abstract:

The possibility of the pion condensation phenomenon in cold and electrically neutral dense Baryonic matter is investigated in β-equilibrium. For simplicity, the consideration is performed in the framework of a Nambu–Jona-Lasinio model with two quark flavors at zero current quark mass and for rather small values of the Baryon chemical potential, where the diquark condensation might be ignored. Two sets of model parameters are used. For the first, the pion condensed phase with finite Baryon Density is realized. In this phase both electrons and the pion condensate take part in the neutralization of the quark electric charge. For the second set of model parameters, the pion condensation is impossible if the neutrality condition is imposed. The behavior of meson masses vs. quark chemical potential has been studied in electrically neutral matter.

• ##### pion condensation in quark matter with finite BaryonDensity
Journal of Physics G, 2006
Co-Authors: D Ebert, K G Klimenko

Abstract:

The phase structure of the Nambu–Jona-Lasinio model at zero temperature and in the presence of Baryon and isospin chemical potentials is investigated. It is shown that in the chiral limit and for a wide range of model parameters, there exist two different phases with pion condensation. In the first, ordinary phase, the Baryon Density is zero and quarks are gapped particles. In the second, gapless pion condensation phase, there is no energy cost for creating only u or both u- and d-quarks, and the Density of Baryons is nonzero.

• ##### Gapless pion condensation in quark matter with finite BaryonDensity
Journal of Physics G, 2006
Co-Authors: D Ebert, K G Klimenko

Abstract:

The phase structure of the Nambu–Jona-Lasinio model at zero temperature and in the presence of Baryon and isospin chemical potentials is investigated. It is shown that in the chiral limit and for a wide range of model parameters, there exist two different phases with pion condensation. In the first, ordinary phase, the Baryon Density is zero and quarks are gapped particles. In the second, gapless pion condensation phase, there is no energy cost for creating only u or both u- and d-quarks, and the Density of Baryons is nonzero.

### Rowan M Thomson – One of the best experts on this subject based on the ideXlab platform.

• ##### holographic phase transitions at finite BaryonDensity
Journal of High Energy Physics, 2007
Co-Authors: Shinpei Kobayashi, Rowan M Thomson, David Mateos, Shunji Matsuura, Robert C Myers

Abstract:

We use holographic techniques to study SU(Nc) super Yang-Mills theory coupled to Nf << Nc flavours of fundamental matter at finite temperature and Baryon Density. We focus on four dimensions, for which the dual description consists of Nf D7-branes in the background of Nc black D3-branes, but our results apply in other dimensions as well. A non-zero chemical potential μb or Baryon number Density nb is introduced via a nonvanishing worldvolume gauge field on the D7-branes. Ref. [1] identified a first order phase transition at zero Density associated with `melting’ of the mesons. This extends to a line of phase transitions for small nb, which terminates at a critical point at finite nb. Investigation of the D7-branes’ thermodynamics reveals that (∂μb/∂nb)T<0 in a small region of the phase diagram, indicating an instability. We comment on a possible new phase which may appear in this region.