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Título:
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Many-body Coulomb gauge exotic and charmed hybrids
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Autores:
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Llanes Estrada, Felipe José ;
Cotanch, Stephen R
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Tipo de documento:
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texto impreso
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Editorial:
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Elsevier Science BV, 2001-04-05
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Dimensiones:
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application/pdf
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Nota general:
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info:eu-repo/semantics/openAccess
info:eu-repo/semantics/openAccess
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Idiomas:
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Palabras clave:
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Estado = Publicado
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Materia = Ciencias: Física
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Tipo = Artículo
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Resumen:
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Utilizing an effective QCD Coulomb gauge Hamiltonian with linear confinement specified by lattice, we report a relativistic many-body calculation for the light exotic and charmed hybrid mesons. The Hamiltonian successfully describes both quark and gluon sectors, with vacuum and quasiparticle properties generated by a BCS transformation and more elaborate TDA and RPA diagonalizations for the meson (q¯q ) and glueball (gg) masses. Hybrids entail a computationally intense relativistic three quasiparticle (q ¯ qg) calculation with the 9-dimensional Hamiltonian matrix elements evaluated variationally by Monte Carlo techniques. Our new TDA (RPA) spectrum for the nonexotic 1?? charmed (c ¯ c and c ¯cg) system provides an explanation for the overpopulation of the observed J/? states. For the important 1?+ light exotic channel we obtain hybrid masses above 2 GeV, in broad agreement with lattice and flux tube models, indicating that the recently observed resonances at 1.4 and 1.6 GeV are of different, perhaps four quark, structure.
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En línea:
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https://eprints.ucm.es/id/eprint/23493/1/Llanes-Estrada_FJ70.pdf
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