Few-Body Systems

, Volume 55, Issue 11, pp 1099–1108 | Cite as

Photon Asymmetries in \({nd\rightarrow}\) 3 Hγ Using EFT(\({/\!\!\!\pi}\)) Approach

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Abstract

The parity-violating Lagrangian of the weak nucleon-nucleon (NN) interaction in the pionless effective field theory (EFT(\({/\!\!\!\pi}\))) approach contains five independent unknown low-energy coupling constants (LECs). The photon asymmetry with respect to neutron polarization in \({np\rightarrow d\gamma A_\gamma^{np}}\), the circular polarization of outgoing photon in \({np\rightarrow d\gamma P_\gamma^{np}}\), the neutron spin rotation in hydrogen \({\frac{1}{\rho}\frac{d\phi^{np}}{dl}}\) , the neutron spin rotation in deuterium \({\frac{1}{\rho}\frac{d\phi^{nd}}{dl}}\) and the circular polarization of γ-emission in \({nd\rightarrow}\) 3 Hγ \({P^{nd}_\gamma}\) are the parity-violating observables which have been recently calculated in terms of parity-violating LECs in the EFT(\({/\!\!\!\pi}\)) framework. We obtain the LECs by matching the parity-violating observables to the Desplanques, Donoghue, and Holstein (DDH) best value estimates. Then, we evaluate photon asymmetry with respect to the neutron polarization \({a^{nd}_\gamma}\) and the photon asymmetry in relation to deuteron polarization \({A^{nd}_\gamma}\) in \({nd\rightarrow}\) 3 Hγ process. We finally compare our EFT(\({/\!\!\!\pi}\)) photon asymmetries results with the experimental values and the previous calculations based on the DDH model.

Keywords

Circular Polarization Parity Violation Faddeev Equation Wavy Line Neutron Polarization 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.
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Copyright information

© Springer-Verlag Wien 2014

Authors and Affiliations

  1. 1.Department of PhysicsUniversity of TehranTehranIran

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