منابع مشابه
The Hadronic Contribution to (g − 2)µ
The evaluation of the hadronic contribution to the muon magnetic anomaly aμ is revisited, taking advantage of new experimental data on ee annihilation into hadrons: SND and CMD-2 for the ππ channel, and BABAR for multihadron final states. Discrepancies are observed between KLOE and CMD-2/SND data, preventing one from averaging all the ee results. The long-standing disagreement between spectral ...
متن کاملHadronic Light-by-Light Contribution to the Muon g-2.
There are indications that hadronic loops in some electroweak observables are almost saturated by parton level effects. Taking this as the hypothesis for this work, we propose a genuine parton level estimate of the hadronic light-by-light contribution to the anomalous magnetic moment of the muon, a(LBL)/(mu)(had). Our quark mass definitions and values are motivated in detail, and the simplicity...
متن کاملOn the Leading Order Hadronic Contribution to (g−2)μ
Sum rule constraints dominated by the independent high-scale input, αs(MZ), are shown to be satisfied by I = 1 spectral data from hadronic τ decays, but violated by the pre-2005 electroproduction (EM) cross-section data. Determinations of the Standard Model (SM) hadronic contribution to (g−2)μ incorporating τ decay data are thus favored over those based solely on EM data, implying a SM predicti...
متن کاملHadronic Light - by - Light Contribution to Muon g - 2
I present the main results obtained in a recent work together with Eduardo de Rafael and Arkady Vainshtein on the hadronic light-by-light contribution to muon g-2. We came to the estimate aHLbL μ = (10.5 ± 2.6) × 10 −10. Here, some emphasis is put in pointing out where the future KLOE2 twophoton experimental program can help to reduce the present model dependence of aHLbL μ . May 2009 Contribut...
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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ژورنال
عنوان ژورنال: EPJ Web of Conferences
سال: 2016
ISSN: 2100-014X
DOI: 10.1051/epjconf/201613001013