Počet záznamů: 1
Studies of kaonic atoms and nuclei
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SYSNO ASEP 0509990 Druh ASEP C - Konferenční příspěvek (mezinárodní konf.) Zařazení RIV D - Článek ve sborníku Název Studies of kaonic atoms and nuclei Tvůrce(i) Friedman, E. (IL)
Gal, A. (IL)
Óbertová, Jaroslava (UJF-V) ORCID, RID
Mareš, Jiří (UJF-V) RID, ORCIDCelkový počet autorů 4 Číslo článku 020013 Zdroj.dok. AIP Conference Proceedings, 2130. - Melville : American Institute of Physics Inc., 2019 - ISSN 0094-243X - ISBN 978-0-7354-1872-1 Poč.str. 8 s. Forma vydání Tištěná - P Akce 13th International Conference on Hypernuclear and Strange Particle Physics Datum konání 24.06.2018 - 29.06.2018 Místo konání Portsmouth Země US - Spojené státy americké Typ akce WRD Jazyk dok. eng - angličtina Země vyd. US - Spojené státy americké Klíč. slova resonance ; baryons ; kanoic atoms Vědní obor RIV BE - Teoretická fyzika Obor OECD Atomic, molecular and chemical physics (physics of atoms and molecules including collision, interaction with radiation, magnetic resonances, Mössbauer effect) Institucionální podpora UJF-V - RVO:61389005 UT WOS 000557835700013 EID SCOPUS 85070276052 DOI 10.1063/1.5118381 Anotace This contribution reviews recent studies of kaonic atoms and nuclei performed by the Jerusalem-Prague Collaboration using K- optical potentials derived from state-of-the-art chirally-motivated meson-baryon coupled-channel interaction models. Underlying free-space K-N scattering amplitudes are modified to account for in-medium effects caused by Pauli blocking. Strong energy dependence of the amplitudes near threshold is treated self-consistently, which leads to substantial downward subthreshold energy shift. Thorough analyses of kaonic atoms revealed that these K- optical potentials derived within chiral EFT approaches have to be supplemented by a phenomenological term representing K- multi-nucleon interactions in the medium in order to achieve good fits of strong-interaction level shifts and widths in kaonic atoms across the periodic table. It is found that only two of the considered models are simultaneously capable of reproducing the single-nucleon K- absorption fractions at rest from bubble chamber experiments. These models are then applied in optical model calculations of kaonic nuclei. The K- multi-nucleon absorption is found to have a decisive impact on the widths of K--nuclear quasi-bound states which are excessively large. The detection of kaonic nuclear states is thus most probably limited to the lightest few-body nuclear systems. Pracoviště Ústav jaderné fyziky Kontakt Markéta Sommerová, sommerova@ujf.cas.cz, Tel.: 266 173 228 Rok sběru 2020
Počet záznamů: 1