This work is a critical re-analysis of the results obtained by the AMADEUS collaboration, concerning the measurement of the K- multi-nucleon absorption reactions, on a 12C target, in the Λp final state (Del Grande et al 2019 Eur. Phys. J. C 79, 190). We show that a good estimate of the K- two-nucleon absorption total branching ratio can be extracted, given that the measured final state interactions and conversion reactions contain information on almost all the remaining hyperon-nucleon final state combinations. The main contribution to the total branching ratio of the K- two-nucleon absorption in Carbon is extracted from the measured ratios and is found to be (16.1 ± 2.9(stat.)+4.3-5.5 (syst.))%, which is in agreement with recent theoretical predictions. The missing contribution, from those few channels for which a Λp pair could not be detected in the final state of the interaction, is also estimated combining both the measured branching ratios and the available theoretical information, and amounts to (5.5 ± 0.1(stat.)+1.0-0.9(syst.))%. All together the total branching ratio of the K- two-nucleon absorption in Carbon is found to be (21.6 ± 2.9(stat.)+4.4-5.6}(syst.))%.

Del Grande, R., Piscicchia, K., Cargnelli, M., Curceanu, C., Fabbietti, L., Marton, J., et al. (2020). Total branching ratio of the K-two-nucleon absorption in 12C. PHYSICA SCRIPTA, 95(8), 084012 [10.1088/1402-4896/ab9ed3].

Total branching ratio of the K-two-nucleon absorption in 12C

Selce A.;
2020

Abstract

This work is a critical re-analysis of the results obtained by the AMADEUS collaboration, concerning the measurement of the K- multi-nucleon absorption reactions, on a 12C target, in the Λp final state (Del Grande et al 2019 Eur. Phys. J. C 79, 190). We show that a good estimate of the K- two-nucleon absorption total branching ratio can be extracted, given that the measured final state interactions and conversion reactions contain information on almost all the remaining hyperon-nucleon final state combinations. The main contribution to the total branching ratio of the K- two-nucleon absorption in Carbon is extracted from the measured ratios and is found to be (16.1 ± 2.9(stat.)+4.3-5.5 (syst.))%, which is in agreement with recent theoretical predictions. The missing contribution, from those few channels for which a Λp pair could not be detected in the final state of the interaction, is also estimated combining both the measured branching ratios and the available theoretical information, and amounts to (5.5 ± 0.1(stat.)+1.0-0.9(syst.))%. All together the total branching ratio of the K- two-nucleon absorption in Carbon is found to be (21.6 ± 2.9(stat.)+4.4-5.6}(syst.))%.
Del Grande, R., Piscicchia, K., Cargnelli, M., Curceanu, C., Fabbietti, L., Marton, J., et al. (2020). Total branching ratio of the K-two-nucleon absorption in 12C. PHYSICA SCRIPTA, 95(8), 084012 [10.1088/1402-4896/ab9ed3].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11590/375022
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