631 research outputs found
The Dispersive Approach to Electroweak Processes in the Background Magnetic Field
We propose a new method to compute amplitudes of electroweak processes in the
strong background magnetic field, using as an example. We
show that the {\it moments} of width are proportional to the
derivatives of photon polarization function at the zero energy. Hence, the
pair-production width can be easily calculated from the latter by the inverse
Mellin transform. The prospects of our approach are commented.Comment: 3 pages, talk presented in DPF2000, Aug. 9-12, Ohio State
On non hadronic origin of high energy neutrinos
Some of the non hadronic interactions, such as the \eta resonance formation
in the \gamma \gamma interactions and the muon pair production in the e\gamma
interactions, are identified as possible source interactions for generating
high energy neutrinos in the cosmos.Comment: 9 pages, 1 figure, talk given at First NCTS Workshop on Astroparticle
Physics, 6-9 December, 2001, Kenting, Taiwan (to appear in its proceedings
edited by H. Athar, Guey-Lin Lin, and K.-W. Ng
A semi-analytic calculation on the atmospheric tau neutrino flux in the GeV to TeV energy range
We present a semi-analytic calculation on the atmospheric tau neutrino flux
in the GeV to TeV energy range. The atmospheric flux is calculated
for the entire zenith angle range. This flux is contributed by the oscillations
of muon neutrinos coming from the two-body decays and the three-body
decays, and the intrinsic tau neutrino flux surviving the
oscillations. The uncertainties in our calculations are discussed in detail.
The implications of our result are also discussed.Comment: Revtex, 30 pages (including 13 figures); paper expanded and title
slightly changed, to appear in Astroparticle Physic
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