M. Moeini Arani, S. Bayegan
We study the parity violating (PV) $nd\rightarrow$ $^3H\gamma$ process at thermal energy, using pionless effective field theory. The PV NN Lagrangian that is given for the weak NN interaction contains five independent low energy coupling constants (LECs). One can be able to use the PV Lagrangian for few-body systems at low energy if all of these coupling constants are being determined. Although the theoretical calculations will not evaluate the unknown low energy constants however, by comparison of the calculated observables with a sufficient number of experimental data, one can be able to calculate very accurately the coupling constants. So, we need five observables to obtain them. One of the five PV observables is the photon circular polarization for $nd\rightarrow$ $^3H\gamma$ process. It is our aim in this paper to calculate this PV observable at leading order as a function of coupling constants and compare it with DDH framework results.
View original:
http://arxiv.org/abs/1111.0391
No comments:
Post a Comment