Systematic errors of transition form factors extracted by means of light-cone sum rules

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dc.creatorLucha, Wolfgang
dc.creatorMelikhov, Dmitri
dc.creatorSimula, Silvano
dc.date2007-12-02
dc.date.accessioned2026-07-07T08:46:49Z
dc.date.available2026-07-07T08:46:49Z
dc.descriptionThis talk presents results of our study of heavy-to-light transition form factors extracted with the help of light-cone sum rules. We employ a model with scalar particles interacting via massless-boson exchange and study the heavy-to-light correlator, relevant for the extraction of the transition form factor. We calculate this correlator in two different ways: by making use of the Bethe-Salpeter wave function of the light bound state and by making use of the light-cone expansion. This allows us to calculate the full correlator and separately the light-cone contribution to it. In this way we show that the off-light cone contributions are not suppressed compared to the light-cone one by any large parameter. Numerically, the difference between the value of the form factor extracted from the full correlator and from the light-cone contribution to this correlator is found to be about 20-30% in a wide range of masses of the particles involved in the decay process.
dc.description8 pages, talk given at "Hadron 07", XII International Conference on Hadron Spectroscopy, Frascati, October 8-13, 2007
dc.identifierhttps://arxiv.org/abs/0712.0178
dc.identifierhttp://arxiv.org/abs/0712.0178
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/143381
dc.subjectHigh Energy Physics - Phenomenology
dc.titleSystematic errors of transition form factors extracted by means of light-cone sum rules
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