1 99 7 KEK - TH - 530 hep - ph / 9708227 August 1997 Pseudoscalar pole terms in the hadronic light - by - light scattering contribution to muon g − 2
نویسندگان
چکیده
The pseudoscalar pole contribution is the dominant source of the O(α 3) hadronic light-by-light scattering effect in muon g − 2. We have examined this contribution taking account of the off-shell structure of the pseudoscalar-photon-photon anomaly vertex deduced from available experimental data. Our work leads to an improved estimate, −79.2 (15.4) × 10 −11 , for the total hadronic light-by-light scattering contribution to the muon g − 2.
منابع مشابه
Pseudoscalar pole terms in the hadronic light - by - light scattering contribution to muon g − 2
The pseudoscalar pole contribution is the dominant source of the O(α3) hadronic light-by-light scattering effect in muon g − 2. We have examined this contribution taking account of the off-shell structure of the pseudoscalarphoton-photon anomaly vertex deduced from available experimental data. Our work leads to an improved estimate, −79.2 (15.4) × 10−11, for the total hadronic light-by-light sc...
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We correct the error in the sign of the pseudoscalar pole contribution to the muon g − 2, which dominates the O(α) hadronic light-by-light scattering effect. The error originates from the fact that the algebraic manipulation program FORM treats ǫ-tensor so as to satisfy ǫμ1μ2μ3μ4ǫν1ν2ν3ν4η 11η22η33η44 = 24, as opposed to the expected value −24 when Minkowski space-time metric η is specified (at...
متن کاملComment on the sign of the pseudoscalar pole contribution to the muon g −
We correct the error in the sign of the pseudoscalar pole contribution to the muon g − 2, which dominates the O(α3) hadronic light-by-light scattering effect. The error originates from the fact that the algebraic manipulation program FORM treats -tensor so as to satisfy μ1μ2μ3μ4 ν1ν2ν3ν4η 11η22η33η44 = 24, as opposed to the expected value −24 when Minkowski space-time metric η is specified (at ...
متن کاملHadronic light - by - light scattering contribution to the muon g − 2 ∗
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متن کاملHadronic light - by - light scattering contribution to g μ − 2 ∗
We briefly review the current status of the hadronic light-by-light scattering correction to the muon g − 2. Then we present our semi-analytical evaluation of the pion-pole contribution, using a description of the pionphoton-photon transition form factor based on large-NC and short-distance properties of QCD. We derive a two-dimensional integral representation which allows to separate the gener...
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تاریخ انتشار 1997