Chiral symmetry and the reaction γp → π0p

V. Bernard; N. Kaiser; Ulf G. Meißner

doi:10.1016/0370-2693(96)00356-5

Chiral symmetry and the reaction γp → π⁰p

V. Bernard, N. Kaiser, Ulf G. Meißner

School Office of the TUM School of Natural Sciences

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Abstract

We analyze the new threshold data for neutral pion photoproduction off protons in the framework of heavy baryon chiral perturbation theory. We show that large loop corrections are needed to understand the S-wave multipole E₀₊ and that all pertinent low-energy constants can be understood within the framework of resonance exchange saturation. Previous inconsistencies in the description of this reaction in the threshold region are resolved.

Original language	English
Pages (from-to)	337-341
Number of pages	5
Journal	Physics Letters B
Volume	378
Issue number	1-4
DOIs	https://doi.org/10.1016/0370-2693(96)00356-5
State	Published - 20 Jun 1996

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title = "Chiral symmetry and the reaction γp → π0p",

abstract = "We analyze the new threshold data for neutral pion photoproduction off protons in the framework of heavy baryon chiral perturbation theory. We show that large loop corrections are needed to understand the S-wave multipole E0+ and that all pertinent low-energy constants can be understood within the framework of resonance exchange saturation. Previous inconsistencies in the description of this reaction in the threshold region are resolved.",

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T1 - Chiral symmetry and the reaction γp → π0p

AU - Bernard, V.

AU - Kaiser, N.

AU - Meißner, Ulf G.

PY - 1996/6/20

Y1 - 1996/6/20

N2 - We analyze the new threshold data for neutral pion photoproduction off protons in the framework of heavy baryon chiral perturbation theory. We show that large loop corrections are needed to understand the S-wave multipole E0+ and that all pertinent low-energy constants can be understood within the framework of resonance exchange saturation. Previous inconsistencies in the description of this reaction in the threshold region are resolved.

AB - We analyze the new threshold data for neutral pion photoproduction off protons in the framework of heavy baryon chiral perturbation theory. We show that large loop corrections are needed to understand the S-wave multipole E0+ and that all pertinent low-energy constants can be understood within the framework of resonance exchange saturation. Previous inconsistencies in the description of this reaction in the threshold region are resolved.

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U2 - 10.1016/0370-2693(96)00356-5

DO - 10.1016/0370-2693(96)00356-5

M3 - Article

AN - SCOPUS:0001992051

SN - 0370-2693

VL - 378

SP - 337

EP - 341

JO - Physics Letters B

JF - Physics Letters B

IS - 1-4

ER -

Chiral symmetry and the reaction γp → π⁰p

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