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Parity nonconservation in the photodisintegration of the deuteron at low energy

Abstract : The parity-nonconserving asymmetry in the deuteron photodisintegration, $\vec{\gamma}+d\to n+p$, is considered with the photon energy ranged up to 10 MeV above the threshold. The aim is to improve upon a schematic estimate assuming the absence of tensor as well as spin-orbit forces in the nucleon-nucleon interaction. The major contributions are due to the vector-meson exchanges, and the strong suppression of the pion-exchange contribution is confirmed. A simple argument, going beyond the observation of an algebraic cancellation, is presented. Contributions of meson-exchange currents are also considered, but found to be less significant.
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http://hal.in2p3.fr/in2p3-00020467
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Submitted on : Wednesday, March 3, 2004 - 11:31:42 AM
Last modification on : Friday, October 8, 2021 - 10:46:05 AM

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C.P. Liu, C.H. Hyun, B. Desplanques. Parity nonconservation in the photodisintegration of the deuteron at low energy. Physical Review C, American Physical Society, 2004, 69, 065502 (11 p.). ⟨10.1016/PhysRevC.69.065502⟩. ⟨in2p3-00020467⟩

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