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.
%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
}