4.1 Article

Photon Asymmetries in nd → 3Hγ Using EFT((π)over-bar) Approach

Journal

FEW-BODY SYSTEMS
Volume 55, Issue 11, Pages 1099-1108

Publisher

SPRINGER WIEN
DOI: 10.1007/s00601-014-0898-z

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Funding

  1. research council of the University of Tehran

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The parity-violating Lagrangian of the weak nucleon-nucleon (NN) interaction in the pionless effective field theory (EFT()) approach contains five independent unknown low-energy coupling constants (LECs). The photon asymmetry with respect to neutron polarization in , the circular polarization of outgoing photon in , the neutron spin rotation in hydrogen , the neutron spin rotation in deuterium and the circular polarization of gamma-emission in (3) H gamma are the parity-violating observables which have been recently calculated in terms of parity-violating LECs in the EFT() 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 and the photon asymmetry in relation to deuteron polarization in (3) H gamma process. We finally compare our EFT() photon asymmetries results with the experimental values and the previous calculations based on the DDH model.

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