Nuclear
Physics Colloquium
Institute for Theoretical Physics, Physics Building, Seminar Room PHYS
2.116
Time: Thursday, January 22, 4:30-5:30 pm (s.t.) (plus
10min for discussion)
Contact: hees@fias.uni-frankfurt.de
Leading
hadronic contribution to the muon $(g-2)$ and other electroweak
observables from $N_f=2+1+1$ twisted mass lattice QCD
Grit Hotzel (HU Berlin)
The
muon anomalous magnetic moment constitutes a prime candidate to possibly
detect new physics beyond the standard model, since a 3 to 4 standard
deviations discrepancy has been observed between its experimental and
theoretical values. The dominant uncertainty originates from its
hadronic contributions. Here, we show our results for the four-flavour
leading-order hadronic contributions to $(g-2)$ of all three leptons.
Performing the continuum limit and an analysis of systematic effects,
full agreement with phenomenological results is found. Furthermore, the
results for the leading hadronic contribution to the running of the
finestructure constant in the low-momentum region are shown, again
matching the phenomenological curve obtained from e⁺ e⁻ scattering data.
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