258 research outputs found
Neutrino-Nucleus Reactions
Neutrino-nucleus reactions as applied to astrophysics are reviewed.Comment: 74,USC(NT)-93-
Nuclear Matrix Elements of Axial-Charge Exchange Currents Derived in Heavy-Fermion Chiral Perturbation Theory
We calculate shell-model matrix elements of the axial-charge exchange current
operators that have been obtained up to the next-to-leading order from
heavy-fermion chiral perturbation theory. It is found that loop corrections to
the soft one-pion-exchange contribution are small (around 10 \%) and have no
significant dependence on the nuclear mass number or on the valence-nucleon
orbits. These results render further support to the chiral-filtering
conjecture.Comment: 19 pages, LaTeX, SNUTP 94-29, USC(NT)-94-
The Solar pp and hep Processes in Effective Field Theory
The strategy of modern effective field theory is exploited to pin down
accurately the flux factors for the and processes in the Sun.
The technique used is to combine the high accuracy established in few-nucleon
systems of the "standard nuclear physics approach" (SNPA) and the systematic
power counting of chiral perturbation theory (ChPT) into a consistent effective
field theory framework. Using highly accurate wave functions obtained in the
SNPA and working to \nlo3 in the chiral counting for the current, we make
totally parameter-free and error-controlled predictions for the and
processes in the Sun.Comment: 5 pages, aipproc macros are included. Talk given at International
Nuclear Physics Conference 2001, Berkeley, California, July 30 - August 3,
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