Single- and two-nucleon antikaon absorption in nuclear matter with chiral meson-baryon interactions

0523760 - ÚJF 2021 RIV US eng J - Journal Article
Óbertová, Jaroslava - Ramos, A.
Single- and two-nucleon antikaon absorption in nuclear matter with chiral meson-baryon interactions.
Physical Review C. Roč. 101, č. 3 (2020), č. článku 035204. ISSN 2469-9985. E-ISSN 2469-9993
R&D Projects: GA ČR GA19-19640S; GA MŠMT EF16_027/0008491
Institutional support: RVO:61389005
Keywords : kaon * meson * production
OECD category: Atomic, molecular and chemical physics (physics of atoms and molecules including collision, interaction with radiation, magnetic resonances, Mössbauer effect)
Impact factor: 3.296, year: 2020
Method of publishing: Limited access
https://doi.org/10.1103/PhysRevC.101.035204

We developed a microscopic model for antikaon absorption on two nucleons in nuclear matter. The absorption is described within a meson-exchange picture and the primary K- N interaction strength is derived from state-of-the-art chiral coupled-channels meson-baryon interaction models. We took into account the medium modification of the K- N scattering amplitudes due to the Pauli correlations. We derived the K- NN as well as K-N optical potentials as functions of nuclear matter density including the real part of the K- NN potential. We calculated the K- single- and two-nucleon absorption fractions and branching ratios for various mesonic and nonmesonic channels. We confirmed the crucial role of in-medium effects in our calculations. Our results are in very good agreement with available experimental data from old bubble chamber experiments as well as with the latest results from the AMADEUS collaboration.
Permanent Link: http://hdl.handle.net/11104/0308057