Neutral pion photoproduction on deuterium in baryon chiral perturbation theory to order q^4

Details Neutral pion photoproduction on deuterium in baryon chiral perturbation theory to order q^4 Neutral pion photoproduction on deuterium in baryon chiral perturbation theory to order q^4

1997-02-03

arxiv.org/abs/hep-ph/9702226v1

Nucl.Phys. A618 (1997) 381-401

Physics

High Energy Physics

High Energy Physics - Phenomenology

25 pp, LaTeX, 6 figures

Scientific paper

10.1016/S0375-9474(97)00133-4

Threshold neutral pion photoproduction on the deuteron is studied in the framework of baryon chiral perturbation theory beyond next-to--leading order in the chiral expansion. To fourth order in small momenta, the amplitude is finite and a sum of two- and three-body interactions with no undetermined parameters. With accurate theoretical and experimental input from the single nucleon sector for the proton amplitude, we investigate the sensitivity of the threshold cross section to the elementary $\gamma n \to \pi^0 n$ amplitude. A precise measurement of the threshold cross section for $\gamma d \to \pi^0 d$ is called for.

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