Exploring high-density baryonic matter: Maximum freeze-out density
نویسندگان
چکیده
منابع مشابه
Ruling out a critical density baryonic universe
It has been suggested by Bartlett and Hall that our universe may have the critical density in baryons by virtue of specific interactions with a ‘shadow’ world. We show that this possibility is severely constrained by primordial nucleosynthesis, stellar evolution and the thermalization of the cosmic microwave background. In particular, recent observations of small angular-scale anisotropy in the...
متن کاملUniversal Pion Freeze-out Phase-Space Density
(2) This equation comprises information from essentially two different classes of experimental results: the single particle momentum spectra (dn/dy, Teff), and the two pion Bose-Einstein correlations (Rs, Ro, Rl, Rol, λdir). We have calculated 〈f〉(pT , y) for the S-S, S-Cu, S-Ag, S-Au, S-Pb and Pb-Pb data from the experiments NA35 [2], NA49 [3], NA44 [4], and for the π-p data from the NA22 expe...
متن کاملTransition from Baryonic to Mesonic Freeze-Out
The recently discovered sharp peak in theK/π ratio is discussed in the framework of the statistical model. In this model a rapid change is expected as the hadronic gas undergoes a transition from a baryon-dominated to a meson-dominated gas. The transition occurs at √ sNN = 8.16 GeV, temperature T = 140 MeV and baryon chemical potential μB = 410 MeV. The maximum in the Λ/π ratio is well reproduc...
متن کاملHalo Density Reduction by Baryonic Settling?
We test the proposal by El-Zant et al. that the dark matter density of halos could be reduced through dynamical friction acting on heavy baryonic clumps in the early stages of galaxy formation. Using N body simulations, we confirm that the inner halo density cusp is flattened to 0.2 of the halo break radius by the settling of a single clump of mass ∼> 0.5% of the halo mass. We also find that an...
متن کاملFreeze-cutting of density gradients.
There are numerous techniques for sampling density gradients in experiments involving the preparative ultracentrifuge. Among the sampling procedures used are: drawing liquid samples from the top of the density gradient with modified pipettes (J. B. Sinclair et al., Phytopathology 47:372, 1957), displacement through the top of the density gradient (E. Huff, H. Oxley, and C. S. Silverman, J. Bact...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: The European Physical Journal A
سال: 2016
ISSN: 1434-6001,1434-601X
DOI: 10.1140/epja/i2016-16218-7