Meson-baryon bound states in a (2+1)-dimensional strongly coupled lattice QCD model.

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Autor(es): dc.creatorFrancisco Neto, Antônio-
Data de aceite: dc.date.accessioned2025-08-21T15:05:05Z-
Data de disponibilização: dc.date.available2025-08-21T15:05:05Z-
Data de envio: dc.date.issued2017-09-18-
Data de envio: dc.date.issued2017-09-18-
Data de envio: dc.date.issued2004-
Fonte completa do material: dc.identifierhttp://www.repositorio.ufop.br/handle/123456789/8743-
Fonte completa do material: dc.identifierhttps://journals.aps.org/prd/pdf/10.1103/PhysRevD.70.037502-
Fonte completa do material: dc.identifierhttps://doi.org/10.1103/PhysRevD.70.037502-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/capes/1002134-
Descrição: dc.descriptionWe consider bound states of a meson and a baryon ~meson and antibaryon! in lattice QCD in a Euclidean formulation. For simplicity, considering the 1 parity sector we analyze an SU(3) theory with a single flavor in 211 dimensions and two-dimensional Dirac matrices. We work in the strong coupling regime, i.e., in a region of parameters such that the hopping parameter k is sufficiently small and k@g0 22, where g0 22 is the pure gauge coupling. There is a meson ~baryon! particle with asymptotic mass 22 lnk (23 lnk) and an isolated dispersion curve. Here, in a ladder approximation, we show that there is no meson baryon ~or meson-antibaryon! bound state solution to the Bethe-Salpeter equation up to the meson-baryon threshold (;25 lnk). The absence of such a bound state is an effect of a spatial range-one repulsive potential that is local in space at order k 3, i.e., the leading order in the hopping parameter k .-
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Idioma: dc.languageen-
Direitos: dc.rightsrestrito-
Título: dc.titleMeson-baryon bound states in a (2+1)-dimensional strongly coupled lattice QCD model.-
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