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Near-threshold $\pi^-$ photoproduction on the deuteron

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arxiv 1812.03023 v2 pith:XTYNCT2G submitted 2018-12-07 nucl-ex

B. Strandberg , K. G. Fissum , J. R. M. Annand , W. J. Briscoe , J. Brudvik , F. Cividini , L. Clark , E. J. Downie
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K. England G. Feldman D. I. Glazier K. Hamilton K. Hansen L. Isaksson R. Al Jebali M. A. Kovash A. E. Kudryavtsev V. Lensky S. Lipschutz M. Lundin M. Meshkian D. G. Middleton L. S. Myers D. O'Donnell G. V. O'Rielly B. Oussena M. F. Preston B. Schröder B. Seitz I. I. Strakovsky M. Taragin V. E. Tarasov
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keywords gammacrossdeuteronexperimentalnear-thresholdphotoproductionsectiontarget
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abstract

The first experimental investigation of the near-threshold cross section for incoherent $\pi^-$ photoproduction on the deuteron $\gamma$ d -> $\pi^-$ pp is presented. The experimental technique involved detection of the ~131 MeV gamma ray resulting from the radiative capture of photoproduced $\pi^-$ in the target. The total cross section has been measured using an unpolarized tagged-photon beam, a liquid-deuterium target, and three very large NaI(Tl) spectrometers. The data are compared to theoretical models that give insight into the elementary reaction $\gamma$ n -> $\pi^-$ p and pion-nucleon and nucleon-nucleon final-state interactions.

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Cited by 1 Pith paper

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  1. Pion photoproduction off nucleons in covariant chiral perturbation theory

    hep-ph 2019-08 conditional novelty 5.0 of 10

    Including the Delta(1232) resonance in a third-order covariant chiral perturbation theory fit reproduces near-threshold pion photoproduction data across all charge channels far better than leaving it out.

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