%0 Journal Article %1 RamseyMusolf2002Hadronic %A Ramsey-Musolf, M. %A Wise, Mark B. %D 2002 %J Physical Review Letters %K g-2, lbl %N 4 %R 10.1103/physrevlett.89.041601 %T Hadronic Light-by-Light Contribution to Muon g-2 in Chiral Perturbation Theory %U http://dx.doi.org/10.1103/physrevlett.89.041601 %V 89 %X We compute the hadronic light-by-light scattering contributions to the muon anomalous magnetic moment, \$\amulbl\$, in chiral perturbation theory that are enhanced by large logarithms and a factor of \$N\_C\$. They depend on a low-energy constant entering pseudoscalar meson decay into a charged lepton pair. The uncertainty introduced by this constant is \$6010^-11\$, which is comparable in magnitude to the present uncertainty entering the leading-order vacuum polarization contributions to the anomalous moment. It may be reduced to some extent through an improved measurement of the \$\pi^0e^+ e^-\$ branching ratio. However, the dependence of \$\amulbl\$ on non-logarithmically enhanced effects cannot be constrained except through the measurement of the anomalous moment itself. The extraction of information on new physics would require a future experimental value for the anomalous moment differing significantly from the 2001 result reported by the E821 collaboration.

@article{RamseyMusolf2002Hadronic, abstract = {We compute the hadronic light-by-light scattering contributions to the muon anomalous magnetic moment, \$\amulbl\$, in chiral perturbation theory that are enhanced by large logarithms and a factor of \$N\_C\$. They depend on a low-energy constant entering pseudoscalar meson decay into a charged lepton pair. The uncertainty introduced by this constant is \$\pm 60\times 10^{-11}\$, which is comparable in magnitude to the present uncertainty entering the leading-order vacuum polarization contributions to the anomalous moment. It may be reduced to some extent through an improved measurement of the \$\pi^0\to e^+ e^-\$ branching ratio. However, the dependence of \$\amulbl\$ on non-logarithmically enhanced effects cannot be constrained except through the measurement of the anomalous moment itself. The extraction of information on new physics would require a future experimental value for the anomalous moment differing significantly from the 2001 result reported by the E821 collaboration.}, added-at = {2019-02-23T22:09:48.000+0100}, archiveprefix = {arXiv}, author = {Ramsey-Musolf, M. and Wise, Mark B.}, biburl = {https://www.bibsonomy.org/bibtex/2a027051d97183f4defa6e786a22367b1/cmcneile}, citeulike-article-id = {12391094}, citeulike-linkout-0 = {http://arxiv.org/abs/hep-ph/0201297}, citeulike-linkout-1 = {http://arxiv.org/pdf/hep-ph/0201297}, citeulike-linkout-2 = {http://dx.doi.org/10.1103/physrevlett.89.041601}, day = 3, doi = {10.1103/physrevlett.89.041601}, eprint = {hep-ph/0201297}, interhash = {e34d1080dd4a9b65c6fc3cf8e5f8ab65}, intrahash = {a027051d97183f4defa6e786a22367b1}, issn = {0031-9007}, journal = {Physical Review Letters}, keywords = {g-2, lbl}, month = may, number = 4, posted-at = {2013-06-04 17:00:45}, priority = {2}, timestamp = {2019-02-23T22:15:27.000+0100}, title = {{Hadronic Light-by-Light Contribution to Muon g-2 in Chiral Perturbation Theory}}, url = {http://dx.doi.org/10.1103/physrevlett.89.041601}, volume = 89, year = 2002 }