Considerations on rescattering effects for threshold photo- and electro-production of $π^0$ on deuteron

Details Considerations on rescattering effects for threshold photo- and electro-production of $π^0$ on deuteron Considerations on rescattering effects for threshold photo- and electro-production of $π^0$ on deuteron

2001-12-20

arxiv.org/abs/nucl-th/0112063v2

Phys.Rev. C66 (2002) 015203

Physics

Nuclear Physics

Nuclear Theory

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Scientific paper

10.1103/PhysRevC.66.015203

We show that for the S-state $\pi^0$-production in processes $\gamma+d\to d+\pi^0$ and $e^-+d\to e^-+d+\pi^0$ the rescattering effects due to the transition: $ \gamma+d\to p+p+\pi^-$ (or $n+n+\pi^+)\to d+\pi^0$ are cancelled out due to the Pauli principle. The large values for these effects predicted in the past may result from the fact that the spin structure of the corresponding matrix element and the necessary antisymmetrization induced by the presence of identical protons (or neutrons) in the intermediate state was not taken into account accurately. One of the important consequences of these considerations is that $\pi^0$ photo- and electro-production on deuteron near threshold can bring direct information about elementary neutron amplitudes.

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