On the stability of Λ(1405) matter

J. Hrtánková*, N. Barnea, E. Friedman, A. Gal, J. Mareš, M. Schäfer

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

A hypothesis of absolutely stable strange hadronic matter composed of Λ(1405) baryons, here denoted Λ∗, is tested within many-body calculations performed using the Relativistic Mean-Field approach. In our calculations, we employed the Λ∗Λ∗ interaction compatible with the Λ∗Λ binding energy BΛ∗Λ∗ = 40 MeV given by the phenomenological energy-independent K̄ N interaction model by Yamazaki and Akaishi (YA). We found that the binding energy per Λ∗, as well as the central density in Λ many-body systems saturates for mass number A ≥ 120, leaving Λ aggregates highly unstable against strong interaction decay. Moreover, we confronted the YA interaction model with kaonic atom data and found that it fails to reproduce the K- single-nucleon absorption fractions at rest from bubble chamber experiments.

Original languageAmerican English
Title of host publication13th International Conference on Hypernuclear and Strange Particle Physics, HYP 2018
EditorsReinhard Schumacher, Liguang Tang
PublisherAmerican Institute of Physics Inc.
ISBN (Electronic)9780735418721
DOIs
StatePublished - 25 Jul 2019
Event13th International Conference on Hypernuclear and Strange Particle Physics, HYP 2018 - Portsmouth, United States
Duration: 24 Jun 201829 Jun 2018

Publication series

NameAIP Conference Proceedings
Volume2130
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Conference

Conference13th International Conference on Hypernuclear and Strange Particle Physics, HYP 2018
Country/TerritoryUnited States
CityPortsmouth
Period24/06/1829/06/18

Bibliographical note

Publisher Copyright:
© 2019 Author(s).

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