Physics – Nuclear Physics – Nuclear Theory
Scientific paper
2007-09-02
J.Phys.G35:044018,2008
Physics
Nuclear Physics
Nuclear Theory
6 pages, tals at SQM 2007
Scientific paper
10.1088/0954-3899/35/4/044018
We present a single-freeze-out model with thermal and geometric parameters dependent on the position within the fireball and use it to describe the rapidity and transverse-momentum spectra of pions, kaons, protons, and antiprotons measured at RHIC at 200 GeV} by BRAHMS. THERMINATOR is used to perform the necessary simulation, which includes all resonance decays. The result of the fit to the data is the expected growth of the baryon and strange chemical potentials with the spatial rapidity\alpha_\parallel. The value of the baryon chemical potential at \alpha_\parallel ~ 3 is about 200 MeV, i.e. lies in the range of the highest SPS energies. The chosen geometry of the fireball has a decreasing transverse size as the magnitude of \alpha_\parallel is increased, which also corresponds to decreasing transverse flow. The strange chemical potential obtained from the fit to the K+/K- ratio is such that the local strangeness density in the fireball is compatible with zero. The resulting rapidity spectra of net protons are described qualitatively within the statistical approach. As a result of our study, the knowledge of the ``topography'' of the fireball is acquired, allowing for other analyses and predictions.
Biedron Barlomiej
Broniowski Wojciech
No associations
LandOfFree
Rapidity-dependent chemical potentials in a statistical approach does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Rapidity-dependent chemical potentials in a statistical approach, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Rapidity-dependent chemical potentials in a statistical approach will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-467747