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Multi-fermion systems with contact theories
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SYSNO ASEP 0542747 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Multi-fermion systems with contact theories Tvůrce(i) Schäfer, Martin (UJF-V) ORCID, RID
Contessi, L. (IL)
Kirscher, J. (PL)
Mareš, Jiří (UJF-V) RID, ORCIDCelkový počet autorů 4 Číslo článku 136194 Zdroj.dok. Physics Letters. B. - : Elsevier - ISSN 0370-2693
Roč. 816, MAY (2021)Poč.str. 5 s. Forma vydání Tištěná - P Jazyk dok. eng - angličtina Země vyd. NL - Nizozemsko Klíč. slova contact effective field theory ; pionless ; renormalization ; unitarity ; universality Vědní obor RIV BE - Teoretická fyzika Obor OECD Atomic, molecular and chemical physics (physics of atoms and molecules including collision, interaction with radiation, magnetic resonances, Mössbauer effect) CEP GA19-19640S GA ČR - Grantová agentura ČR Způsob publikování Open access Institucionální podpora UJF-V - RVO:61389005 UT WOS 000647421500004 EID SCOPUS 85102656621 DOI 10.1016/j.physletb.2021.136194 Anotace 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. Pracoviště Ústav jaderné fyziky Kontakt Markéta Sommerová, sommerova@ujf.cas.cz, Tel.: 266 173 228 Rok sběru 2022 Elektronická adresa https://doi.org/10.1016/j.physletb.2021.136194
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