Pion Form Factor in Improved Holographic QCD Backgrounds

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dc.creatorKwee, Herry J.
dc.creatorLebed, Richard F.
dc.date2007-12-11
dc.date2008-06-05
dc.date.accessioned2026-07-07T11:39:20Z
dc.date.available2026-07-07T11:39:20Z
dc.descriptionWe extend a recent numerical calculation of the pion electromagnetic form factor F_π(Q^2) in holographic QCD to study two important issues regarding the behavior of fields in the bulk. First, we show that using a chiral symmetry-breaking field formally satisfying the boundary conditions of the ``soft-wall'' model changes numerical results very little from the earlier calculation that ignores these constraints. Second, we use a background field that interpolates between ``hard-wall'' and ``soft-wall'' models to obtain an improved model that reproduces the desirable phenomenological features of both. In all cases, F_π$ for large Q^2 is shallower than data, an effect that can be cured by relaxing the fit to one of the static observables, particularly the decay constant f_π.
dc.description19 pages, 1 eps figure. This version, to appear in Phys. Rev. D, includes an extended discussion of the fit to the soft-wall model and a detailed description of the numerical approaches used
dc.identifierhttps://arxiv.org/abs/0712.1811
dc.identifierhttp://arxiv.org/abs/0712.1811
dc.identifierPhys.Rev.D77:115007,2008
dc.identifierdoi:10.1103/PhysRevD.77.115007
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/199881
dc.subjectHigh Energy Physics - Phenomenology
dc.titlePion Form Factor in Improved Holographic QCD Backgrounds
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