Calculations in the impulse approximation indicate that radiative Bhabha scattering at BESIII could produce tens of thousands of γn → π⁻p events on deuteron and beryllium targets, enabling precise neutron momentum distribution measurements.
Pion photo- and electroproduction with chiral MAID
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abstract
We present a calculation of pion photo- and electroproduction in manifestly Lorentz-invariant baryon chiral perturbation theory up to and including order $q^4$. We fix the low-energy constants by fitting experimental data in all available reaction channels. Our results can be accessed via a web interface, the so-called chiral MAID. We explain how our program works and how it can be used for further analysis.
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2026 1verdicts
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Exploring the neutron momentum distribution in nuclei through $\gamma n \to \pi^- p$ at an electron-positron collider
Calculations in the impulse approximation indicate that radiative Bhabha scattering at BESIII could produce tens of thousands of γn → π⁻p events on deuteron and beryllium targets, enabling precise neutron momentum distribution measurements.