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High Energy Physics - Phenomenology

arXiv:1602.08967 (hep-ph)
[Submitted on 29 Feb 2016 (v1), last revised 3 Mar 2016 (this version, v2)]

Title:$Δ(1232)$ resonance in the $\vecγp\rightarrow pπ^0$ reaction at threshold

Authors:A. N. Hiller Blin, T. Ledwig, M. J. Vicente Vacas
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Abstract:We calculate the neutral pion photoproduction on the proton near threshold in covariant baryon chiral perturbation theory, including the $\Delta(1232)$ resonance as an explicit degree of freedom, up to chiral order $p^{7/2}$ in the $\delta$ counting. We compare our results with recent low-energy data from the Mainz Microtron for angular distributions and photon asymmetries. The convergence of the chiral series of the covariant approach is found to improve substantially with the inclusion of the $\Delta(1232)$ resonance.
Subjects: High Energy Physics - Phenomenology (hep-ph)
Cite as: arXiv:1602.08967 [hep-ph]
  (or arXiv:1602.08967v2 [hep-ph] for this version)
  https://doi.org/10.48550/arXiv.1602.08967
Journal reference: Phys. Rev. D 93, 094018 (2016)
Related DOI: https://doi.org/10.1103/PhysRevD.93.094018

Submission history

From: Astrid Nathalie Hiller Blin [view email]
[v1] Mon, 29 Feb 2016 14:11:32 UTC (193 KB)
[v2] Thu, 3 Mar 2016 17:30:24 UTC (193 KB)
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