Pion photoproduction off nucleons in covariant chiral perturbation theory

Abstract

Pion photoproduction off the nucleon close to threshold is studied in covariant baryon chiral perturbation theory at O($p^3$) in the extended-on-mass-shell scheme, with the explicit inclusion of the $\Delta (1232)$ resonance using the $\delta$ counting. The theory is compared to the available data of cross sections and polarization observables for all the charge channels. Most of the necessary low energy constants are well known from the analysis of other processes and the comparison with data strongly constrains some of the still unknown ones. The $\Delta (1232)$ contribution is significant in improving the agreement with data, even at the low energies considered.

arXiv commentRevised version

References in corpus (48)

• New Developments in FeynCalc 9.0
• Improved chiral nucleon-nucleon potential up to next-to-next-to-next-to-leading order
• Unitary Isobar Model - MAID2007
• The chiral representation of the $\pi N$ scattering amplitude and the pion-nucleon sigma term
• Electromagnetic excitation of the Delta(1232)-resonance
• Renormalization of relativistic baryon chiral perturbation theory and power counting
• NuSTEC White Paper: Status and Challenges of Neutrino-Nucleus Scattering
• Chiral Perturbation Theory and Baryon Properties
• Baryon Chiral Perturbation Theory in Manifestly Lorentz Invariant Form
• The chiral effective pion-nucleon Lagrangian of order p^4
• Mesonic low-energy constants
• Effective theory of the Delta(1232) in Compton scattering off the nucleon
• Systematic 1/M Expansion for Spin 3/2 Particles
• Progress and open questions in the physics of neutrino cross sections
• Leading SU(3)-breaking corrections to the baryon magnetic moments in Chiral Perturbation Theory
• Chiral perturbation theory
• Improved description of the $\pi N$-scattering phenomenology in covariant baryon chiral perturbation theory
• Analyses of pion-nucleon elastic scattering amplitudes up to $O(p^4)$ in extended-on-mass-shell subtraction scheme
• Axial, induced pseudoscalar, and pion-nucleon form factors in manifestly Lorentz-invariant chiral perturbation theory
• Predictive powers of chiral perturbation theory in Compton scattering off protons
• Determining pseudoscalar meson photo-production amplitudes from complete experiments
• The nucleon mass and pion-nucleon sigma term from a chiral analysis of lattice QCD world data
• Pion-nucleon scattering in covariant baryon chiral perturbation theory with explicit Delta resonances
• The lowest-lying baryon masses in covariant SU(3)-flavor chiral perturbation theory
• Test of low-energy theorems for p(\vec{gamma},π^{0})p in the threshold region
• Octet-baryon axial-vector charges and SU(3)-breaking effects in the semileptonic hyperon decays
• Electromagnetic form factors of the nucleon in relativistic baryon chiral perturbation theory
• New insights into the spin structure of the nucleon
• Baryon masses and nucleon sigma terms in manifestly Lorentz-invariant baryon chiral perturbation theory
• Aspects of near threshold neutral pion photoproduction off protons
• Elastic pion-nucleon scattering in chiral perturbation theory: A fresh look
• Gold-plated moments of nucleon structure functions in baryon chiral perturbation theory
• Accurate Test of Chiral Dynamics in the \boldmath$\vec{\gamma }p\to {\pi }^{0}p$ Reaction
• Electromagnetic form factors of the nucleon in effective field theory
• The nucleon and Delta(1232) form factors at low momentum-transfer and small pion masses
• Extraction of nucleon axial charge and radius from lattice QCD results using baryon chiral perturbation theory
• Radiative pi0 photoproduction on protons in the Delta+(1232) region
• Chiral expansion of the nucleon mass to order q^6
• SU(3)-breaking corrections to the hyperon vector coupling $f_1(0)$ in covariant baryon chiral perturbation theory
• Threshold ${\pi }^0$ photoproduction in relativistic chiral perturbation theory
• Weak pion production off the nucleon in covariant chiral perturbation theory
• Upper Energy Limit of Heavy Baryon Chiral Perturbation Theory in Neutral Pion Photoproduction
• Neutral-current weak pion production off the nucleon in covariant chiral perturbation theory
• The width of the $\Delta$-resonance at two loop order in baryon chiral perturbation theory
• $\Delta (1232)$ resonance in the $\vec{\gamma }p\to p{\pi }^0$ reaction at threshold
• Low--Energy Theorems for Weak Pion Production
• The Delta(1232) Resonance in Chiral Effective Field Theory
• Hyperon forward spin polarizability gamma0 in baryon chiral perturbation theory

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• Dispersive Analysis of Low Energy $\gamma N\to \pi N$ Process and Studies on the $N^{\ast }(890)$ Resonance
• Radiative Correction to Lepton Proton Scatterings in Manifestly Lorentz-Invariant Chiral Perturbation Theory
• Dispersive analysis of low energy ${\gamma }^{\ast }N\to \pi N$ process
• Assessing the theory-data tension in neutrino-induced charged pion production: the effect of final-state nucleon distortion
• Radiative pion photoproduction in covariant chiral perturbation theory