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http://dspace.mediu.edu.my:8181/xmlui/handle/10261/2736| Title: | Form factors in the radiative pion decay |
| Keywords: | QCD Chiral Lagrangians Radiative pion decay |
| Publisher: | Springer |
| Description: | We perform an analysis of the form factors that rule the structure-dependent amplitude in 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 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. Ministerio de Educación y Ciencia, FPA2004-00996. Generalitat Valenciana, GVACOMP2007-156. European Commission, EU MRTN-CT-2006-035482 (FLAVIAnet)- Peer reviewed |
| URI: | http://dspace.mediu.edu.my:8181/xmlui/handle/10261/2736 |
| Other Identifiers: | Eur. Phys. J. C52 (2007) 325-338 http://hdl.handle.net/10261/2736 10.1140/epjc/s10052-007-0393-5 |
| Appears in Collections: | Digital Csic |
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