https://doi.org/10.1140/epja/i2013-13117-5
Regular Article - Theoretical Physics
Parity-violating photon circular polarization in nd
3H
with effective field theory at thermal energy
Department of Physics, University of Tehran, P.O.Box 14395-547, Tehran, Iran
* e-mail: m.moeini.a@khayam.ut.ac.ir
Received:
22
April
2013
Revised:
13
August
2013
Accepted:
22
August
2013
Published online:
19
September
2013
We study the parity-violating effects in nd
3H
process using pionless effective field theory (EFT( /
) at thermal energy. For the weak NN interaction the parity-violating Lagrangian contains five independent low-energy coupling constants (LECs). One can fix the coupling constants by comparison of the calculated observables with a sufficient number of experimental data. So, we need five observables to obtain LECs. One of the five parity-violating observables is the photon circular polarization (
in nd
3H
process. We calculate
at the leading order in terms of LECs. We compare our results with the previous
calculation based on the model of Desplanques, Donoghue and Holstein.
© SIF, Springer-Verlag Berlin Heidelberg, 2013