arXiv
Open Access
2016
Hadronic Vacuum Polarization in True Muonium
Henry Lamm
Abstrak
The leading-order hadronic vacuum polarization contribution to the hyperfine splitting of true muonium is reevaluated in two ways. The first considers a more complex pionic form factor and better estimates of the perturbative QCD contributions. The second, more accurate method directly integrates the Drell ratio $R(s)$ to obtain $C_{1,\rm hvp}=-0.0489(3)$. This corresponds to an energy shift in the hyperfine splitting of $ΔE^μ_{hfs,\rm hvp}=276196(51)$ MHz.
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Henry Lamm
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Informasi Jurnal
- Tahun Terbit
- 2016
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- en
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- arXiv
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- Open Access ✓