On two- and three-body descriptions of hybrid mesons

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dc.creatorBuisseret, Fabien
dc.creatorSemay, Claude
dc.date2006-10-11
dc.date2007-01-10
dc.date.accessioned2026-07-07T10:25:40Z
dc.date.available2026-07-07T10:25:40Z
dc.descriptionHybrid mesons are exotic mesons in which the color field is not in its ground state. Their understanding deserves interest from a theoretical point of view, because it is intimately related to nonperturbative aspects of QCD. In this work, we analyze and compare two different descriptions of hybrid mesons, namely a two-body $q\bar q$ system with an excited string, or a three-body $q\bar q g$ system. In particular, we show that the constituent gluon approach is equivalent to an effective excited string in the heavy hybrid sector. Instead of a numerical resolution, we use the auxiliary field technique. It allows to find simplified analytical mass spectra and wave functions, and still leads to reliable qualitative predictions. We also investigate the light hybrid sector, and found a mass for the lightest hybrid meson which is in satisfactory agreement with lattice QCD and other effective models.
dc.description2 figures
dc.identifierhttps://arxiv.org/abs/hep-ph/0610132
dc.identifierhttp://arxiv.org/abs/hep-ph/0610132
dc.identifierPhys.Rev.D74:114018,2006
dc.identifierdoi:10.1103/PhysRevD.74.114018
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/176619
dc.subjectHigh Energy Physics - Phenomenology
dc.subjectHigh Energy Physics - Lattice
dc.titleOn two- and three-body descriptions of hybrid mesons
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