Friday, May 25, 2012

1205.5370 (Tatsumi Aoyama et al.)

Complete Tenth-Order QED Contribution to the Muon g-2    [PDF]

Tatsumi Aoyama, Masashi Hayakawa, Toichiro Kinoshita, Makiko Nio
We report the result of our calculation of the complete tenth-order QED terms of the muon g-2. Our result is a_\mu^{(10)} = 753.29 (1.04) in units of (\alpha/\pi)^5, which is about 4.5 s.d. larger than the leading-logarithmic estimate 663 (20). We also improved the precision of the eighth-order QED term of a_\mu, obtaining a_\mu^{(8)} = 130.8794 (63) in units of (\alpha/\pi)^4. Using the best non-QED value of \alpha, we obtain the standard model prediction a_\mu(SM) = 116 591 840 (59) \times 10^{-11}, to be compared with the measured value a_\mu(exp) = 116 592 089 (63) \times 10^{-11}. The difference a_\mu(exp) - a_\mu(SM) = 240 (87) \times 10^{-11} is about 2.8 s.d.
View original: http://arxiv.org/abs/1205.5370

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