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Hadronic contributions to αμ below one GeV

✍ Scribed by Gilberto Colangelo

Publisher
Elsevier Science
Year
2004
Tongue
English
Weight
528 KB
Volume
131
Category
Article
ISSN
0920-5632

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✦ Synopsis

I present a method for evaluating the hadronic vacuum polarization contribution below 1 GeV to a, which relies on analyticity, unitarity and chiral symmetry, as well as on data. The main advantage is that in the region just above threshold, where data are either scarce or have large errors, these theoretical constraints are particularly strong, and therefore allow us to reduce the uncertainties with respect to a purely dat~based evaluation. Some preliminary numerical results are presented as illustration of the method.

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