Antibaryon interactions with the nuclear medium

Kód výsledku v IS VaVaI

RIV/61389005:_____/16:00489090 - isvavai.cz

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Antibaryon interactions with the nuclear medium

Popis výsledku v původním jazyce

This contribution deals with our recent study of antibaryon interactions with the nuclear medium within the relativistic mean-field approach using antibaryon coupling constants consistent with available experimental data. We performed calculations of anti B (anti B = anti p, anti Lambda, anti Sigma, anti Xi) bound states in selected nuclei. Due to the lack of information on the in-medium antihyperon annihilation near threshold only the anti p absorption was considered. It was described by the imaginary part of a phenomenological optical potential fitted to anti p-atom data. The annihilation was treated dynamically, taking into account explicitly the reduced phase space for annihilation products in the nuclear medium, as well as the compressed nuclear density due to the antiproton. The energy available for the annihilation products was evaluated self-consistently, considering additional energy shift due to particle momenta in the anti p-nucleus system. Corresponding anti p widths were significantly reduced, however, they still remain sizable. Next, the anti p-nucleus interaction was constructed using the latest version of the Paris antiNN potential. Related scattering amplitudes were used to define the complex anti p optical potential in the nuclear medium. The resulting anti p 1s binding energies are about 10% smaller and widths about 20% larger than those obtained with the phenomenological approach.

Název v anglickém jazyce

Antibaryon interactions with the nuclear medium

Popis výsledku anglicky

This contribution deals with our recent study of antibaryon interactions with the nuclear medium within the relativistic mean-field approach using antibaryon coupling constants consistent with available experimental data. We performed calculations of anti B (anti B = anti p, anti Lambda, anti Sigma, anti Xi) bound states in selected nuclei. Due to the lack of information on the in-medium antihyperon annihilation near threshold only the anti p absorption was considered. It was described by the imaginary part of a phenomenological optical potential fitted to anti p-atom data. The annihilation was treated dynamically, taking into account explicitly the reduced phase space for annihilation products in the nuclear medium, as well as the compressed nuclear density due to the antiproton. The energy available for the annihilation products was evaluated self-consistently, considering additional energy shift due to particle momenta in the anti p-nucleus system. Corresponding anti p widths were significantly reduced, however, they still remain sizable. Next, the anti p-nucleus interaction was constructed using the latest version of the Paris antiNN potential. Related scattering amplitudes were used to define the complex anti p optical potential in the nuclear medium. The resulting anti p 1s binding energies are about 10% smaller and widths about 20% larger than those obtained with the phenomenological approach.

Druh

D - Stať ve sborníku

CEP obor

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OECD FORD obor

10301 - Atomic, molecular and chemical physics (physics of atoms and molecules including collision, interaction with radiation, magnetic resonances, Mössbauer effect)

Projekt

GA15-04301S: Interakce hadronů s nukleony a jádry

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2016

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

Proceedings of Science

ISBN

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ISSN

1824-8039

e-ISSN

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Počet stran výsledku

8

Strana od-do

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Název nakladatele

PoS

Místo vydání

Adelaide

Místo konání akce

Adelaide

Datum konání akce

11. 9. 2016

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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