Precision measurements of σhadronic for αeff(E) at ILC energies and (g−2)μ
F. Jegerlehner
- Vol. 162, pp 22-32
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In this paper, the authors introduce the concept of constant α(E), which is the non-perturbative hadronic contribution to charge screening by vacuum polarization (VP) which limits its precision.Abstract:
1. INTRODUCTIONOf all non-perturbative hadronic effects enter-ing the predictions of a host of electroweak pre-cision observables, the main effect enters via theeffective fine-structure “constant” α(E) [1,2]. Itis the non-perturbative hadronic contribution tocharge screening by vacuum polarization (VP)which limits its precision. The value of α(E)is of interest for a wide range of energies, wellknown examples are α(Mread more
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