Constraining the chirally motivated πΣ−K¯N models with the πΣ photoproduction mass spectra

0584293 - ÚJF 2025 RIV NL eng J - Článek v odborném periodiku
Cieplý, Aleš - Bruns, Peter Christian
Constraining the chirally motivated πΣ−K¯N models with the πΣ photoproduction mass spectra.
Nuclear Physics. A. Roč. 1043, MAR (2024), č. článku 122819. ISSN 0375-9474. E-ISSN 1873-1554
Institucionální podpora: RVO:61389005
Klíčová slova: Meson-baryon interactions * Chiral perturbation theory * Lambda(1405) * pi Sigma photoproduction
Obor OECD: Atomic, molecular and chemical physics (physics of atoms and molecules including collision, interaction with radiation, magnetic resonances, Mössbauer effect)
Impakt faktor: 1.4, rok: 2022
Způsob publikování: Omezený přístup
https://doi.org/10.1016/j.nuclphysa.2024.122819

The paper presents a first time attempt on a combined fit of the K(-)p low-energy data and the pi Sigma photoproduction mass spectra, performed without fixing the meson-baryon rescattering amplitudes to a specific pi Sigma - (k) over barN coupled channels model obtained from fitting exclusively the K(-)p data. The formalism adopted to describe the photoproduction process is based on chiral perturbation theory and employs a limited number of free parameters. The achieved description of the photoproduction mass distributions is not quite satisfactory, leaving a room for improving the photo-kernel construction. Although the presented models tend to constrain the positions of the Lambda(1405) poles it is difficult to draw any conclusions before accomplishing better data reproduction.
Trvalý link: https://hdl.handle.net/11104/0352225