The decay constant of the first excited pion from lattice QCD

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dc.creatorUKQCD Collaboration
dc.creatorMcNeile, C.
dc.creatorMichael, C.
dc.date2006-07-21
dc.date2006-08-10
dc.date.accessioned2026-07-07T11:43:24Z
dc.date.available2026-07-07T11:43:24Z
dc.descriptionWe review the theory that predicts that the decay constant of the excited light pseudo-scalar mesons are suppressed in the chiral limit relative to the pion decay constant. We compute the decay constant of the first excited pion ($π^\prime$) using unquenched QCD at a fixed lattice spacing with sea quarks of mass as low as a third the mass of the strange quark. The final result is very sensitive to the improvement conditions. We obtain $f_{π^\prime} / f_π$ = 0.078(93) in the chiral limit.
dc.descriptionUpdated references. Clarified discussion around equations 2 and 3
dc.identifierhttps://arxiv.org/abs/hep-lat/0607032
dc.identifierhttp://arxiv.org/abs/hep-lat/0607032
dc.identifierPhys.Lett.B642:244-247,2006
dc.identifierdoi:10.1016/j.physletb.2006.09.056
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/201224
dc.subjectHigh Energy Physics - Lattice
dc.titleThe decay constant of the first excited pion from lattice QCD
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