Parity-violating polarization in $np \to d\gamma$ with a pionless effective field theory
Abstract
We consider the two-nucleon weak interaction with a pionless effective field theory. Dibaryon fields are introduced to facilitate calculations and ensure precision in the initial and final state propagators. Weak interactions are accounted for with the parity-violating dibaryon-nucleon-nucleon vertices, which contain unknown weak dibaryon-nucleon-nucleon coupling constants. We apply the model to the calculation of a parity-violating observable in the neutron-proton capture at threshold. Result is obtained up to the linear order in the unknown dibaryon-nucleon-nucleon coupling constants. We compare our result to the one obtained from a hybrid calculation, and discuss the extension to weak interactions in the few-body systems.
Keywords
Cite
@article{arxiv.0907.3995,
title = {Parity-violating polarization in $np \to d\gamma$ with a pionless effective field theory},
author = {J. W. Shin and S. Ando and C. H. Hyun},
journal= {arXiv preprint arXiv:0907.3995},
year = {2010}
}
Comments
12 pages, 1 figure