Hadronic Light-by-Light and the Pion Polarizability

Details Hadronic Light-by-Light and the Pion Polarizability Hadronic Light-by-Light and the Pion Polarizability

2012-01-04

arxiv.org/abs/1201.0809v2

Physics

High Energy Physics

High Energy Physics - Phenomenology

4 pages, 1 figure

Scientific paper

We compute the charged pion loop contribution to the light-by-light scattering amplitude for off-shell photons in chiral perturbation theory through next-to-leading order (NLO). We show that NLO contributions are relatively more important due to a fortuitous numerical suppression of the leading-order (LO) terms. Consequently, one expects theoretical predictions for the hadronic light-by-light (HLBL) contribution to the muon anomalous magnetic moment, $a_\mu^{HLBL}$, to be sensitive to the choice of model for the higher momentum-dependence of the LBL amplitude. We show that models employed thus far for the charged pion loop contribution to $a_\mu^{HLBL}$ are not consistent with low-momentum behavior implied by quantum chromodynamics, having omitted potentially significant contributions from the pion polarizability.

Affiliated with

Also associated with

No associations

Rating

Hadronic Light-by-Light and the Pion Polarizability does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Hadronic Light-by-Light and the Pion Polarizability, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Hadronic Light-by-Light and the Pion Polarizability will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-156183