Lambda*(1405)-matter: Stable or unstable?

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389005%3A_____%2F18%3A00496796" target="_blank" >RIV/61389005:_____/18:00496796 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/68407700:21340/18:00328140

Výsledek na webu

<a href="http://dx.doi.org/10.1016/j.physletb.2018.08.031" target="_blank" >http://dx.doi.org/10.1016/j.physletb.2018.08.031</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.physletb.2018.08.031" target="_blank" >10.1016/j.physletb.2018.08.031</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Lambda*(1405)-matter: Stable or unstable?

Popis výsledku v původním jazyce

A recent suggestion by Akaishi and Yamazaki (2017) [3] that purely-Lambda*(1405) nuclei provide the absolute minimum energy in charge-neutral baryon matter for baryon-number A greater than or similar to 8, is tested within RMF calculations. Abroad range of Lambda* interaction strengths, commensurate with ((K) over bar(K) over bar NN)(I=0) binding energy assumed to be of order 100 MeV, is scanned. It is found that the binding energy per Lambda*, B/A, saturates for A greater than or similar to 120 with values of B/A considerably below 100 MeV, implying that Lambda*(1405) matter is highly unstable against strong decay to Lambda and Sigma hyperon aggregates. The central density of Lambda* matter is found to saturate as well, at roughly twice nuclear matter density. Moreover, it is shown that the underlying very strong (K) over barN potentials, fitted for isospin I = 0 to the mass and width values of Lambda*(1405), fail to reproduce values of single-nucleon absorption fractions deduced across the periodic table from K- capture-at-rest bubble chamber experiments.

Název v anglickém jazyce

Lambda*(1405)-matter: Stable or unstable?

Popis výsledku anglicky

A recent suggestion by Akaishi and Yamazaki (2017) [3] that purely-Lambda*(1405) nuclei provide the absolute minimum energy in charge-neutral baryon matter for baryon-number A greater than or similar to 8, is tested within RMF calculations. Abroad range of Lambda* interaction strengths, commensurate with ((K) over bar(K) over bar NN)(I=0) binding energy assumed to be of order 100 MeV, is scanned. It is found that the binding energy per Lambda*, B/A, saturates for A greater than or similar to 120 with values of B/A considerably below 100 MeV, implying that Lambda*(1405) matter is highly unstable against strong decay to Lambda and Sigma hyperon aggregates. The central density of Lambda* matter is found to saturate as well, at roughly twice nuclear matter density. Moreover, it is shown that the underlying very strong (K) over barN potentials, fitted for isospin I = 0 to the mass and width values of Lambda*(1405), fail to reproduce values of single-nucleon absorption fractions deduced across the periodic table from K- capture-at-rest bubble chamber experiments.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

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

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2018

Kód důvěrnosti údajů

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

Název periodika

Physics Letters. B

ISSN

0370-2693

e-ISSN

—

Svazek periodika

785

Číslo periodika v rámci svazku

10

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

5

Strana od-do

90-94

Kód UT WoS článku

000447424000012

EID výsledku v databázi Scopus

2-s2.0-85052289065