Pion Form Factors in Holographic QCD

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dc.creatorKwee, Herry J.
dc.creatorLebed, Richard F.
dc.date2007-08-30
dc.date2007-12-19
dc.date.accessioned2026-07-07T11:18:58Z
dc.date.available2026-07-07T11:18:58Z
dc.descriptionUsing a holographic dual model of QCD, we compute the pion electromagnetic form factor F_pi(Q^2) in the spacelike momentum transfer region, as well as pion couplings to vector mesons g_rho^(n) pi pi. Spontaneous and explicit chiral symmetry breaking are intrinsic features of this particular holographic model. We consider variants with both ``hard-wall'' and ``soft-wall'' infrared cutoffs, and find that the F_pi(Q^2) data tend to lie closer to the hard-wall model predictions, although both are too shallow for large Q^2. By allowing the parameters of the soft-wall model (originally fixed by observables such as m_rho) to vary, one finds fits that tend to agree better with F_pi(Q^2). We also compute the pion charge radius <r_pi^2> for a variety of parameter choices, and use the values of f^(n)_rho, g_{rho^(n) pi pi} and m^(n)_rho to observe the saturation of F_pi(0) by rho poles.
dc.description17 pages, 2 figures, revised fits using consistent normalization of f_pi. References updated
dc.identifierhttps://arxiv.org/abs/0708.4054
dc.identifierhttp://arxiv.org/abs/0708.4054
dc.identifierJHEP0801:027,2008
dc.identifierdoi:10.1088/1126-6708/2008/01/027
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/193527
dc.subjectHigh Energy Physics - Phenomenology
dc.titlePion Form Factors in Holographic QCD
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