Tetraquarks, pentaquarks and dibaryons in the large N QCD

Autor:	Luciano Maiani, Veronica Riquer, Wei Wang
Jazyk:	angličtina
Rok vydání:	2018
Předmět:	Astrophysics QB460-466 Nuclear and particle physics. Atomic energy. Radioactivity QC770-798
Zdroj:	European Physical Journal C: Particles and Fields, Vol 78, Iss 12, Pp 1-10 (2018)
Druh dokumentu:	article
ISSN:	1434-6044 1434-6052
DOI:	10.1140/epjc/s10052-018-6486-5
Popis:	Abstract We study the multiquark hadrons in large N QCD under the ’t-Hooft limit, extending Witten’s picture of the baryons. We explore the decay widths of tetraquarks, pentaquarks and dibaryons. Based on the decay behaviors, we point out that in the $$N\rightarrow \infty $$ N→∞ limit decay widths of tetraquarks stay constant, while those of pentaquarks and dibaryons above certain thresholds can diverge. In the large N limit, we find that the ground states of the three spectroscopic series are stable or narrow and that the excited states of pentaquarks and dibaryons above the indicated thresholds are not observables. We compare our results with those obtained in previous large N generalizations of tetraquarks.
Databáze:	Directory of Open Access Journals
Externí odkaz:	https://doaj.org/article/ac616658d3494972a8b548becdc34161 Zobrazit plný text záznamu View record in DOAJ Plný text ve formátu PDF Plný text ve formátu HTML
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