Threshold pion photoproduction and chiral models of the nucleon

T. Schäfer; W. Weise

doi:10.1016/0375-9474(91)90739-S

Threshold pion photoproduction and chiral models of the nucleon

T. Schäfer
, W. Weise

University of Regensburg

Research output: Contribution to journal › Article › peer-review

9 Scopus citations

Abstract

We present calculations of the chiral and isospin symmetry-breaking corrections to the threshold pion photoproduction amplitude E₀₊. The calculations are based on two chiral models of the nucleon: the chiral bag model and the non-topological soliton model. We find that ΔE₀₊ from explicit chiral-symmetry breaking is substantial, but not sufficient to explain the discrepancy between the measured γp → π⁰p threshold amplitude and its predicted value based on the chiral low-energy theorem.

Original language	English
Pages (from-to)	520-538
Number of pages	19
Journal	Nuclear Physics, Section A
Volume	531
Issue number	3-4
DOIs	https://doi.org/10.1016/0375-9474(91)90739-S
State	Published - Sep 1991
Externally published	Yes

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10.1016/0375-9474(91)90739-S

Cite this

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title = "Threshold pion photoproduction and chiral models of the nucleon",

abstract = "We present calculations of the chiral and isospin symmetry-breaking corrections to the threshold pion photoproduction amplitude E0+. The calculations are based on two chiral models of the nucleon: the chiral bag model and the non-topological soliton model. We find that ΔE0+ from explicit chiral-symmetry breaking is substantial, but not sufficient to explain the discrepancy between the measured γp → π0p threshold amplitude and its predicted value based on the chiral low-energy theorem.",

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year = "1991",

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T1 - Threshold pion photoproduction and chiral models of the nucleon

AU - Schäfer, T.

AU - Weise, W.

PY - 1991/9

Y1 - 1991/9

N2 - We present calculations of the chiral and isospin symmetry-breaking corrections to the threshold pion photoproduction amplitude E0+. The calculations are based on two chiral models of the nucleon: the chiral bag model and the non-topological soliton model. We find that ΔE0+ from explicit chiral-symmetry breaking is substantial, but not sufficient to explain the discrepancy between the measured γp → π0p threshold amplitude and its predicted value based on the chiral low-energy theorem.

AB - We present calculations of the chiral and isospin symmetry-breaking corrections to the threshold pion photoproduction amplitude E0+. The calculations are based on two chiral models of the nucleon: the chiral bag model and the non-topological soliton model. We find that ΔE0+ from explicit chiral-symmetry breaking is substantial, but not sufficient to explain the discrepancy between the measured γp → π0p threshold amplitude and its predicted value based on the chiral low-energy theorem.

UR - https://www.scopus.com/pages/publications/33846592713

U2 - 10.1016/0375-9474(91)90739-S

DO - 10.1016/0375-9474(91)90739-S

M3 - Article

AN - SCOPUS:33846592713

SN - 0375-9474

VL - 531

SP - 520

EP - 538

JO - Nuclear Physics, Section A

JF - Nuclear Physics, Section A

IS - 3-4

ER -

Threshold pion photoproduction and chiral models of the nucleon

Abstract

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