$1^{-+}$ exotic meson at light quark masses

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dc.creatorHedditch, J. N.
dc.creatorKamleh, W.
dc.creatorLasscock, B. G.
dc.creatorLeinweber, D. B.
dc.creatorWilliams, A. G.
dc.creatorZanotti, J. M.
dc.date2005-09-23
dc.date2006-01-13
dc.date.accessioned2026-07-07T10:28:42Z
dc.date.available2026-07-07T10:28:42Z
dc.descriptionThe mass of the $1^{-+}$ exotic meson, created with hybrid interpolating fields, is explored at light quark masses approaching 25 MeV ($m_π/ m_ρ\simeq 1/3$). Access to such light quark masses is facilitated by the use of the Fat-Link Irrelevant Clover (FLIC) fermion action. Additionally, we make use of large ($20^3 \times 40$) lattices to obtain good control of statistical and finite volume errors. Our results indicate that the $1^{-+}$ exotic exhibits significant curvature close the chiral limit, indicating previous linear extrapolations, far from the chiral regime, have overestimated the mass of the $1^{-+}$. We find for the first time in lattice studies a $1^{-+}$ mass in agreement with the $π_1 (1600)$ candidate. We also find a strangeness $\pm$1 $J^P = 1^-$ state with a mass close to 2 GeV.
dc.description8 pages, 11 figures, 3 tables, published version
dc.identifierhttps://arxiv.org/abs/hep-lat/0509106
dc.identifierhttp://arxiv.org/abs/hep-lat/0509106
dc.identifierPhys.Rev.D72:114507,2005
dc.identifierdoi:10.1103/PhysRevD.72.114507
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/177542
dc.subjectHigh Energy Physics - Lattice
dc.title$1^{-+}$ exotic meson at light quark masses
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