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- Title
Form factors in the radiative pion decay.
- Authors
Mateu, V.; Portolés, J.
- Abstract
We perform an analysis of the form factors that rule the structure-dependent amplitude in radiative pion decay. The resonance contributions to π→eνeγ 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 smoothening of the form factors at high transfer of momentum. A comparison between theoretical and experimental determination 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 uncertainties, the search for new physics in this process is not feasible.
- Subjects
PION production; PION-pion interactions; FUNCTOR theory; CALCULUS of tensors; ASYMPTOTIC expansions; PHYSICS research
- Publication
European Physical Journal C -- Particles & Fields, 2007, Vol 52, Issue 2, p325
- ISSN
1434-6044
- Publication type
Article
- DOI
10.1140/epjc/s10052-007-0393-5