Nature of the Lambda nn(J(pi)=1/2(+), I=1) and H-3(Lambda)*(J(pi)=3/2(+), I=0) states

Kód výsledku v IS VaVaI

RIV/61389005:_____/21:00541433 - isvavai.cz

Nalezeny alternativní kódy

RIV/68407700:21340/21:00352356

Výsledek na webu

https://doi.org/10.1103/PhysRevC.103.025204

DOI - Digital Object Identifier

10.1103/PhysRevC.103.025204

Jazyk výsledku

angličtina

Název v původním jazyce

Nature of the Lambda nn(J(pi)=1/2(+), I=1) and H-3(Lambda)*(J(pi)=3/2(+), I=0) states

Popis výsledku v původním jazyce

The nature of the Lambda nn and H-3(Lambda)*(J(pi) = 3/2(+), I = 0) states is investigated within a pionless effective field theory at leading order, constrained by the low-energy Lambda N scattering data and hypernuclear three- and four-body data. Bound-state solutions are obtained using the stochastic variational method, and the continuum region is studied by employing two independent methods: the inverse analytic continuation in the coupling constant method and the complex scaling method. Our calculations yield both the Lambda nn and(Lambda)( 3)H* states unbound. We conclude that the excited state(Lambda)( 3)H* is a virtual state and the Lambda nn pole located close to the three-body threshold in a complex energy plane could convert to a true resonance with Re(E) > 0 for some considered Lambda N interactions. Finally, the stability of resonance solutions is discussed and limits of the accuracy of performed calculations are assessed.

Název v anglickém jazyce

Nature of the Lambda nn(J(pi)=1/2(+), I=1) and H-3(Lambda)*(J(pi)=3/2(+), I=0) states

Popis výsledku anglicky

The nature of the Lambda nn and H-3(Lambda)*(J(pi) = 3/2(+), I = 0) states is investigated within a pionless effective field theory at leading order, constrained by the low-energy Lambda N scattering data and hypernuclear three- and four-body data. Bound-state solutions are obtained using the stochastic variational method, and the continuum region is studied by employing two independent methods: the inverse analytic continuation in the coupling constant method and the complex scaling method. Our calculations yield both the Lambda nn and(Lambda)( 3)H* states unbound. We conclude that the excited state(Lambda)( 3)H* is a virtual state and the Lambda nn pole located close to the three-body threshold in a complex energy plane could convert to a true resonance with Re(E) > 0 for some considered Lambda N interactions. Finally, the stability of resonance solutions is discussed and limits of the accuracy of performed calculations are assessed.

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

GA19-19640S: Studium interakcí hadronů, jejich produkce a vázaných stavů

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2021

Kód důvěrnosti údajů

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

Název periodika

Physical Review C

ISSN

2469-9985

e-ISSN

2469-9993

Svazek periodika

103

Číslo periodika v rámci svazku

2

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

13

Strana od-do

025204

Kód UT WoS článku

000620346400004

EID výsledku v databázi Scopus

2-s2.0-85102033922