The mass of H-dibaryon is estimated in an SU(3) Skyrme model using the exact diagonalization method. With the parameters determined from the best fit to the B = 1 baryon spectrum, the mass of H-dibaryon is obtained as 1818 MeV.
We study the characteristics of the QCD phase transitions in dense hadronic matter using the Skyrme model constructed on S 3 . We find numerically the localized solutions on S 3 using the extended Skyrme model which implements correctly the scale symmetry of QCD. The transition from the localized phase to the delocalized phase is found to be of first order at the critical radius of the hypersphere, L c . The chiral restoration and the gluon decondensation also take place at the same critical size.
Recent measurements of deuterium abundances from QSO absorption spectra show two conflicting numbers, which differ by an order of magnitude. Allowing the neutrino degeneracy together with gravitational constant variation at the epoch of primordial nucleosynthesis, the implication of these observations on the 6 Li, 9 Be and 11 B abundances will be discussed. Within the permitted ranges consistent with D, 4 He and 7 Li, we observe the strong η dependence of 11 B as in SBBN but no significant dependence of 6 Li and 9 Be on the baryon number density is observed. The predictions of 6 Li and 9 Be for low and high deuterium differ by an order of magnitude and predictions for 11 B differ by several orders of magnitude at most and vary with η.
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