On mass corrections to the decays P —> l+ l-статья
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Дата последнего поиска статьи во внешних источниках: 18 июля 2013 г.
Аннотация:The Mellin–Barnes representation is used to improve the theoretical estimate of mass corrections to the width
of a light pseudoscalar meson decay into a lepton pair, P l+l–. The full resummation of the terms
ln( /Λ2)( /Λ2)n and ( /Λ2)n to the decay amplitude is performed, where ml is the lepton mass and Λ ≈ mρ
is the characteristic scale of the P γ*γ* form factor. The total effect of the mass corrections for the e+e–
channel is negligible and, for the μ+μ– channel, its order is of a few percent.