262 research outputs found
Resonant production of gamma rays in jolted cold neutron stars
Acoustic shock waves passing through colliding cold neutron stars can cause
repetitive superconducting phase transitions in which the proton condensate
relaxes to its equilibrium value via coherent oscillations. As a result, a
resonant non-thermal production of gamma rays in the MeV energy range with
power up to 10^(52) erg/s can take place during the short period of time before
the nuclear matter is heated by the shock waves.Comment: 9 pages, 2 figures include
Supersymmetric Q-balls: theory and cosmology
MSSM predicts the existence of Q-balls, some of which can be entirely stable.
Both stable and unstable Q-balls can play an important role in cosmology. In
particular, Affleck-Dine baryogenesis can result in a copious production of
stable baryonic Q-balls, which can presently exist as a form of dark matter.Comment: talk presented at PASCOS-98; transparencies available at
http://wwwinfo.cern.ch/~kusenko/PASCOS98.ps; 4 pages, latex, sprocl, psfi
Future determination of the neutrino-nucleon cross section at extreme energies
Future detectors of cosmic rays, such as EUSO and OWL, can test the Standard
Model predictions for the neutrino interactions at energies well beyond the
reach of any terrestrial experiment. The relative rates of horizontal and
upgoing air showers, combined with the angular distribution of upgoing air
showers will allow one to measure the neutrino-nucleon cross section at
center-of-mass energy 10^5 GeV or higher.Comment: Talk presented at Workshop on electromagnetic probes of fundamental
physics, October 16-21, 2001, Erice, Ital
Dark matter from Affleck-Dine baryogenesis
Fragmentation of the Affleck-Dine condensate into Q-balls could fill the
Universe with dark matter either in the form of stable baryonic balls, or LSP
produced from the decay of unstable Q-balls. The dark matter and the ordinary
matter in the Universe may share the same origin.Comment: 4 pages, aipproc macro included; to appear in "Particle Physics and
the Early Universe (COSMO-98)", ed. by David O. Caldwell, American Institute
of Physic
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