Muon g – 2 theory: The hadronic part
نویسندگان
چکیده
منابع مشابه
Hadronic 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...
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We compute the hadronic light-by-light scattering contributions to the muon anomalous magnetic moment, a m had , in chiral perturbation theory that are enhanced by large logarithms and a factor of NC . They depend on a low-energy constant constrained by h ! mm and p0 ! ee branching ratios. However, the dependence of aLL m had on nonlogarithmically enhanced effects cannot be constrained except t...
متن کاملHadronic light-by-light scattering contribution to the muon g - 2: an effective field theory approach.
The hadronic light-by-light contribution to a(mu), the anomalous magnetic moment of the muon, is discussed from the point of view of an effective low-energy theory. As an application, the coefficient of the leading logarithm arising from the two-loop graphs involving two anomalous vertices is computed, and found to be positive. This corresponds to a positive sign for the pion-pole contribution ...
متن کاملHadronic light-by-light scattering effect on muon g-2.
The hadronic light-by-light scattering contribution to muon g −2 is examined using low energy effective theories of QCD, the Nambu-Jona-Lasinio model and hidden local chiral symmetry, as guides. Our result is −36 × 10 −11 with an uncertainty of ±16 × 10 −11 , which includes our best estimate of model dependence. This is within the expected measurement uncertainty of 40 × 10 −11 in the forthcomi...
متن کاملTheory of the Hadronic Light - by - Light Contribution to Muon g - 2
I report on the theory, recent calculations and present status of the hadronic light-by-light contribution to muon g − 2. In particular, I report on work done together with Eduardo de Rafael and Arkady Vainshtein where we get aHLbL = (10.5 ± 2.6) × 10−10 as our present result for this quantity. September 2009 Invited talk at “Sixth International Workshop on Chiral Dynamics”, July 6-1
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ژورنال
عنوان ژورنال: EPJ Web of Conferences
سال: 2018
ISSN: 2100-014X
DOI: 10.1051/epjconf/201816600022