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- Title
Parity-violating photon circular polarization in nd $\rightarrow$<sup>3</sup>H$\gamma$ with effective field theory at thermal energy.
- Authors
Moeini Arani, M.; Bayegan, S.
- Abstract
We study the parity-violating effects in nd $\rightarrow$ 3H $\gamma$ process using pionless effective field theory (EFT( / $ \pi$ ) 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 ( $ P_{\gamma}$ in nd $\rightarrow$ 3H $\gamma$ process. We calculate $ P_{\gamma}$ at the leading order in terms of LECs. We compare our results with the previous $ P_{\gamma}$ calculation based on the model of Desplanques, Donoghue and Holstein.
- Subjects
CP violation; CIRCULAR polarization; COUPLING constants; FEW-body problem; NUCLEON-nucleon interactions; DIBARYON
- Publication
European Physical Journal A -- Hadrons & Nuclei, 2013, Vol 49, Issue 9, p1
- ISSN
1434-6001
- Publication type
Article
- DOI
10.1140/epja/i2013-13117-5