TY - JOUR
T1 - Hadronic light-by-light scattering in muonium hyperfine splitting
AU - Karshenboim, S. G.
AU - Shelyuto, V. A.
AU - Vainshtein, A. I.
PY - 2008/9/22
Y1 - 2008/9/22
N2 - We consider an impact of hadronic light-by-light scattering on the muonium hyperfine structure. A shift of the hyperfine interval Δν(Mu)HLBL is calculated with the light-by-light scattering approximated by the exchange of pseudoscalar and pseudovector mesons. Constraints from the operator product expansion in QCD are used to fix parameters of the model similar to the one used earlier for the hadronic light-by-light scattering in calculations of the muon anomalous magnetic moment. The pseudovector exchange is dominant in the resulting shift, Δν(Mu)HLBL=-0.0065(10)Hz. Although the effect is tiny it is useful in understanding the level of hadronic uncertainties.
AB - We consider an impact of hadronic light-by-light scattering on the muonium hyperfine structure. A shift of the hyperfine interval Δν(Mu)HLBL is calculated with the light-by-light scattering approximated by the exchange of pseudoscalar and pseudovector mesons. Constraints from the operator product expansion in QCD are used to fix parameters of the model similar to the one used earlier for the hadronic light-by-light scattering in calculations of the muon anomalous magnetic moment. The pseudovector exchange is dominant in the resulting shift, Δν(Mu)HLBL=-0.0065(10)Hz. Although the effect is tiny it is useful in understanding the level of hadronic uncertainties.
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U2 - 10.1103/PhysRevD.78.065036
DO - 10.1103/PhysRevD.78.065036
M3 - Article
AN - SCOPUS:52949130579
SN - 1550-7998
VL - 78
JO - Physical Review D - Particles, Fields, Gravitation and Cosmology
JF - Physical Review D - Particles, Fields, Gravitation and Cosmology
IS - 6
M1 - 065036
ER -