The gamma+p->K+ + Sigma0 differential cross section at extremely forward angles was measured at the BGOOD experiment. A three-quarter drop in strength over a narrow range in energy and a strong dependence on the polar angle of the in the centre-of-mass of the reaction is observed at a centre-of-mass energy of 1900 MeV. Residing close to multiple open and hidden strangeness thresholds, the structure appears consistent with meson-baryon threshold effects which may contribute to the reaction mechanism.
Jude, T.c., Alef, S., Bauer, P., Bayadilov, D., Beck, R., Bella, A., et al. (2021). Observation of a cusp-like structure in the γp → K+Σ0 cross section at forward angles and low momentum transfer. PHYSICS LETTERS. SECTION B, 820 [https://doi.org/10.1016/j.physletb.2021.136559].
Observation of a cusp-like structure in the γp → K+Σ0 cross section at forward angles and low momentum transfer
Fantini, A.;Lapik, A.;Messi, F.;Messi, R.;Vegna, V.;
2021-09-10
Abstract
The gamma+p->K+ + Sigma0 differential cross section at extremely forward angles was measured at the BGOOD experiment. A three-quarter drop in strength over a narrow range in energy and a strong dependence on the polar angle of the in the centre-of-mass of the reaction is observed at a centre-of-mass energy of 1900 MeV. Residing close to multiple open and hidden strangeness thresholds, the structure appears consistent with meson-baryon threshold effects which may contribute to the reaction mechanism.| File | Dimensione | Formato | |
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