Form Factors in the radiative pion decay

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dc.creatorMateu, V.
dc.creatorPortoles, J.
dc.date2007-06-07
dc.date2007-08-07
dc.date.accessioned2026-07-07T11:16:42Z
dc.date.available2026-07-07T11:16:42Z
dc.descriptionWe perform an analysis of the form factors that rule the structure-dependent amplitude in the radiative pion decay. The resonance contributions to pion -> e nu_e gamma decays are computed through the proper construction of the vector and axial-vector form factors by setting the QCD driven asymptotic properties of the three-point Green functions VVP and VAP, and by demanding the smoothing of the form factors at high transfer of momentum. A comparison between theoretical and experimental determinations of the form factors is also carried out. We also consider and evaluate the role played by a non-standard tensor form factor. We conclude that, at present and due to the hadronic incertitudes, the search for New Physics in this process is not feasible.
dc.description14 pages, no figures. Typos corrected. Accepted for publication in The European Physical Journal C
dc.identifierhttps://arxiv.org/abs/0706.1039
dc.identifierhttp://arxiv.org/abs/0706.1039
dc.identifierEur.Phys.J.C52:325-338,2007
dc.identifierdoi:10.1140/epjc/s10052-007-0393-5
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/192760
dc.subjectHigh Energy Physics - Phenomenology
dc.subjectHigh Energy Physics - Experiment
dc.subjectHigh Energy Physics - Lattice
dc.titleForm Factors in the radiative pion decay
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