Multi-fermion systems with contact theories

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389005%3A_____%2F21%3A00542747" target="_blank" >RIV/61389005:_____/21:00542747 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/68407700:21340/21:00352379

Výsledek na webu

<a href="https://doi.org/10.1016/j.physletb.2021.136194" target="_blank" >https://doi.org/10.1016/j.physletb.2021.136194</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.physletb.2021.136194" target="_blank" >10.1016/j.physletb.2021.136194</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Multi-fermion systems with contact theories

Popis výsledku v původním jazyce

We address the question of minimal requirements for the existence of quantum bound states. In particular, we demonstrate that a few-body system with zero-range momentum-independent two-body interactions is unstable against decay into clusters, if mixed-symmetry of its wave function is enforced. We claim that any theory in which the two-body scattering length is much larger than any other scale involved exhibits such instability. We exemplify this with the inability of the leading-order pionless effective field theory to describe stable states of A > 4 nuclei. A finite interaction range is identified as a sufficient condition for a bound mixed-symmetry system. The minimal value of this range depends on the proximity of a system to unitarity, on the number of constituents, and on the particular realization of discrete scale invariance of the three-body spectrum.

Název v anglickém jazyce

Multi-fermion systems with contact theories

Popis výsledku anglicky

We address the question of minimal requirements for the existence of quantum bound states. In particular, we demonstrate that a few-body system with zero-range momentum-independent two-body interactions is unstable against decay into clusters, if mixed-symmetry of its wave function is enforced. We claim that any theory in which the two-body scattering length is much larger than any other scale involved exhibits such instability. We exemplify this with the inability of the leading-order pionless effective field theory to describe stable states of A > 4 nuclei. A finite interaction range is identified as a sufficient condition for a bound mixed-symmetry system. The minimal value of this range depends on the proximity of a system to unitarity, on the number of constituents, and on the particular realization of discrete scale invariance of the three-body spectrum.

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

<a href="/cs/project/GA19-19640S" target="_blank" >GA19-19640S: Studium interakcí hadronů, jejich produkce a vázaných stavů</a><br>

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

Physics Letters. B

ISSN

0370-2693

e-ISSN

1873-2445

Svazek periodika

816

Číslo periodika v rámci svazku

MAY

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

5

Strana od-do

136194

Kód UT WoS článku

000647421500004

EID výsledku v databázi Scopus

2-s2.0-85102656621