The meson-exchange induced light–by–light contribution to $(g-2)_μ$ within the nonlocal chiral quark modelстатья
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Дата последнего поиска статьи во внешних источниках: 25 сентября 2013 г.
Аннотация:The current status of the muon anomalous magnetic moment (AMM)
problem is briefly presented. The corrections to the muon AMM coming
from the effects of hadronic light-by-light (LbL) scattering due to light
quark-antiquark exchange in pseudoscalar and scalar channels are esti-
mated within the nonlocal chiral quark model (NχQM). Within this ap-
proach the full kinematic dependence on the photon and meson virtualities
are taken into account. As a result, the meson exchange contributions to
the muon AMM calculated within NχQM are, in general, smaller than the
contributions obtained within other models. The contribution from the
scalar channel is positive and small, but stabilizes the combined with pseu-
doscalar channel result with respect to variation of the model parameters.