4,901 research outputs found
Thermodynamics of pairing transition in hot nuclei
The pairing correlations in hot nuclei Dy are investigated in terms
of the thermodynamical properties by covariant density functional theory. The
heat capacities are evaluated in the canonical ensemble theory and the
paring correlations are treated by a shell-model-like approach, in which the
particle number is conserved exactly. A S-shaped heat capacity curve, which
agrees qualitatively with the experimental data, has been obtained and analyzed
in details. It is found that the one-pair-broken states play crucial roles in
the appearance of the S shape of the heat capacity curve. Moreover, due to the
effect of the particle-number conservation, the pairing gap varies smoothly
with the temperature, which indicates a gradual transition from the superfluid
to the normal state.Comment: 13 pages, 4 figure
Neutrino mu-tau reflection symmetry and its breaking in the minimal seesaw
In this paper, we attempt to implement the neutrino - reflection
symmetry (which predicts and as
well as trivial Majorana phases) in the minimal seesaw (which enables us to fix
the neutrino masses). For some direct (the preliminary experimental hints
towards and ) and indirect
(inclusion of the renormalization group equation effect and implementation of
the leptogenesis mechanism) reasons, we particularly study the breakings of
this symmetry and their phenomenological consequences.Comment: 20 pages, 7 figures, accepted for publication in JHE
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