56,381 research outputs found
Possible Signatures of Quark-Hadron Phase Transitions inside Neutron Stars
The spin-down power of an isolated neutron star can drive its central density
increase and overall structural changes, and trigger a quark-hadron phase
transition. A series of observational signatures may be seen as a result of the
phase transition, including pulsar spin-down and glitch behaviors, Soft Gamma
Repeaters or Gamma-Ray Bursts.Comment: 7 pages, in "From Particles to the Universe", Proceedings of the
Fifteenth Lake Louise Winter Institute Lake Louise, Alberta, Canada 20 - 26
February 2000, ed. A. Astbury et al., World Scientific (Singapore, 2001
Docking positrophilic electrons into molecular attractive potential of fluorinated methanes
The present study shows that the positrophilic electrons of a molecule dock
into the positron attractive potential region in the annihilation process under
the plane-wave approximation. The positron-electron annihilation processes of
both polar and non-polar fluorinated methanes (CH4-nFn, n=0, 1,..., 4) are
studied under this role. The predicted gamma-ray spectra of these fluorinated
methanes agree well with the experiments. It further indicates that the
positrophilic electrons of a molecule docking at the negative end of a bond
dipole are independent from the molecular dipole moment in the annihilation
process.Comment: 11 pages, 5 figure
Flavor Changing Neutral Currents in the Asymmetric Left-Right Gauge Model
In the
extension of the standard model, a minimal (but asymmetric) scalar sector
consists of one doublet and one bidoublet.
Previous and recent studies have shown that this choice is useful for
understanding neutrino mass as well as dark matter. The constraints from flavor
changing neutral currents mediated by the scalar sector are discussed in the
context of the latest experimental data
Unusual charge transport and spin response of doped bilayer triangular antiferromagnets
Within the t-J model, the charge transport and spin response of the doped
bilayer triangular antiferromagnet are studied by considering the bilayer
interaction. Although the bilayer interaction leads to the band splitting in
the electronic structure, the qualitative behaviors of the physical properties
are the same as in the single layer case. The conductivity spectrum shows the
low-energy peak and unusual midinfrared band, the temperature dependent
resistivity is characterized by the nonlinearity metallic-like behavior in the
higher temperature range, and the deviation from the metallic-like behavior in
the lower temperature range, and the commensurate neutron scattering peak near
the half-filling is split into six incommensurate peaks in the underdoped
regime, with the incommensurability increases with the hole concentration at
lower dopings, and saturates at higher dopings.Comment: 8 pages, Revtex, five figures are include
- …