Doubly heavy tetraquark resonant states

Spectrum of the doubly heavy tetraquarks, bbq¯q¯, is studied in a constituent quark model. Four-body problem is solved in a variational method where the real scaling technique is used to identify resonant states above the fall-apart decay thresholds. In addition to the two bound states that were rep...

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Autores principales:	Qi Meng, Masayasu Harada, Emiko Hiyama, Atsushi Hosaka, Makoto Oka
Formato:	article
Lenguaje:	EN
Publicado:	Elsevier 2022
Materias:	Doubly heavy tetraquark Quark model Resonant states Few-body problem Physics QC1-999
Acceso en línea:	https://doaj.org/article/dddeef201b674f438e85502b592c5a19
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id	oai:doaj.org-article:dddeef201b674f438e85502b592c5a19
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spelling	oai:doaj.org-article:dddeef201b674f438e85502b592c5a192021-12-02T04:59:03ZDoubly heavy tetraquark resonant states0370-269310.1016/j.physletb.2021.136800https://doaj.org/article/dddeef201b674f438e85502b592c5a192022-01-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S0370269321007401https://doaj.org/toc/0370-2693Spectrum of the doubly heavy tetraquarks, bbq¯q¯, is studied in a constituent quark model. Four-body problem is solved in a variational method where the real scaling technique is used to identify resonant states above the fall-apart decay thresholds. In addition to the two bound states that were reported in the previous study we have found several narrow resonant states above the BB⁎ and B⁎B⁎ thresholds. Their structures are studied and are interpreted by the quark dynamics. A narrow resonance with spin-parity JP=1+ is found to be a mixed state of a compact tetraquark and a B⁎B⁎ scattering state. This is driven by a strong color Coulombic attraction between the bb quarks. Negative-parity excited resonances with JP=0−, 1− and 2− form a triplet under the heavy-quark spin symmetry. It turns out that they share a similar structure to the λ-mode of a singly heavy baryon as a result of the strongly attractive correlation for the doubly heavy diquark.Qi MengMasayasu HaradaEmiko HiyamaAtsushi HosakaMakoto OkaElsevierarticleDoubly heavy tetraquarkQuark modelResonant statesFew-body problemPhysicsQC1-999ENPhysics Letters B, Vol 824, Iss , Pp 136800- (2022)
institution	DOAJ
collection	DOAJ
language	EN
topic	Doubly heavy tetraquark Quark model Resonant states Few-body problem Physics QC1-999
spellingShingle	Doubly heavy tetraquark Quark model Resonant states Few-body problem Physics QC1-999 Qi Meng Masayasu Harada Emiko Hiyama Atsushi Hosaka Makoto Oka Doubly heavy tetraquark resonant states
description	Spectrum of the doubly heavy tetraquarks, bbq¯q¯, is studied in a constituent quark model. Four-body problem is solved in a variational method where the real scaling technique is used to identify resonant states above the fall-apart decay thresholds. In addition to the two bound states that were reported in the previous study we have found several narrow resonant states above the BB⁎ and B⁎B⁎ thresholds. Their structures are studied and are interpreted by the quark dynamics. A narrow resonance with spin-parity JP=1+ is found to be a mixed state of a compact tetraquark and a B⁎B⁎ scattering state. This is driven by a strong color Coulombic attraction between the bb quarks. Negative-parity excited resonances with JP=0−, 1− and 2− form a triplet under the heavy-quark spin symmetry. It turns out that they share a similar structure to the λ-mode of a singly heavy baryon as a result of the strongly attractive correlation for the doubly heavy diquark.
format	article
author	Qi Meng Masayasu Harada Emiko Hiyama Atsushi Hosaka Makoto Oka
author_facet	Qi Meng Masayasu Harada Emiko Hiyama Atsushi Hosaka Makoto Oka
author_sort	Qi Meng
title	Doubly heavy tetraquark resonant states
title_short	Doubly heavy tetraquark resonant states
title_full	Doubly heavy tetraquark resonant states
title_fullStr	Doubly heavy tetraquark resonant states
title_full_unstemmed	Doubly heavy tetraquark resonant states
title_sort	doubly heavy tetraquark resonant states
publisher	Elsevier
publishDate	2022
url	https://doaj.org/article/dddeef201b674f438e85502b592c5a19
work_keys_str_mv	AT qimeng doublyheavytetraquarkresonantstates AT masayasuharada doublyheavytetraquarkresonantstates AT emikohiyama doublyheavytetraquarkresonantstates AT atsushihosaka doublyheavytetraquarkresonantstates AT makotooka doublyheavytetraquarkresonantstates
_version_	1718400921142034432

Doubly heavy tetraquark resonant states

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