Hadronic τ decay data and a hybrid strategy for the lattice evaluation of the leading order hadronic vacuum polarization contribution to (g−2)μ

2015 ◽  
Vol 260 ◽  
pp. 116-120
Author(s):  
Maarten Golterman ◽  
Kim Maltman ◽  
Santiago Peris
Keyword(s):  
Vacuum Polarization ◽  
Leading Order ◽  
Hybrid Strategy ◽  
Decay Data ◽  
Polarization Contribution

scholarly journals Resolving the τ vs. Electroproduction Discrepancy for the I = 1 Vector Spectral Function and Implications for the SM Prediction for aμ

2006 ◽  
Vol 21 (04) ◽  
pp. 813-816 ◽  
Author(s):  
Kim Maltman
Keyword(s):  
Spectral Function ◽  
Vacuum Polarization ◽  
Sum Rules ◽  
High Scale ◽  
Sum Rule ◽  
Decay Data ◽  
Polarization Contribution ◽  
Model Predictions ◽  
Weighted Integrals ◽  
Good Agreement

Using only independent high-scale OPE input, we investigate QCD sum rule constraints on two currently incompatible versions of the isovector vector spectral function, one obtained from electroproduction (EM) data, the other from hadronic τ decay data. Sum rules involving weighted integrals over the spectral function, from threshold to a variable upper endpoint s0, are employed. It is shown that both the normalization and slope with respect to s0 of the EM spectral integrals disagree with the corresponding OPE expectations, while both normalization and slope are in good agreement when hadronic τ decay data is used instead. These results favor determinations of the leading hadronic vacuum polarization contribution to aμ obtained using the τ decay data, and hence Standard Model predictions for aμ compatible with the current experimental determination.

scholarly journals The hadronic vacuum polarization contribution to $(g-2)_\mu$ from $2+1$ flavours of O($a$) improved Wilson quarks

2019 ◽  
Author(s):  
Hartmut Wittig ◽  
Antoine Gerardin ◽  
Tim Harris ◽  
Georg von Hippel ◽  
Ben Hörz, ◽  
...  
Keyword(s):  
Vacuum Polarization ◽  
Polarization Contribution

scholarly journals Muon g – 2 theory: The hadronic part

2018 ◽  
Vol 166 ◽  
pp. 00022 ◽  
Author(s):  
Fred Jegerlehner
Keyword(s):  
Light Scattering ◽  
Energy Range ◽  
Lattice Qcd ◽  
Vacuum Polarization ◽  
Recent Progress ◽  
Axial Vector ◽  
Status Report ◽  
Leading Order ◽  
Future Prospects ◽  
Polarization Effects

I present a status report of the hadronic vacuum polarization effects for the muon g–2, to be considered as an update of [1]. The update concerns recent new inclusive R measurements from KEDR in the energy range 1.84 to 3.72 GeV. For the leading order contributions I find [see formula in PDF] based on e+e- data [incl. τ data], [see formula in PDF] (NLO) and [see formula in PDF] (NNLO). Collecting recent progress in the hadronic light-by-light scattering I adopt π0, η, η' [95 ± 12] + axial-vector [8 ± 3] + scalar [-6 ± 1] + π, K loops [-20 ± 5] + quark loops [22 ± 4] + tensor [1 ± 0] + NLO [3 ± 2] which yields [see formula in PDF]. With these updates I find [see formula in PDF] a 4.1 σ deviation. Recent lattice QCD results and future prospects to improve hadronic contributions are discussed.

scholarly journals Hadronic Vacuum Polarization Contribution to from the Lattice

2012 ◽  
Vol 225-227 ◽  
pp. 269-272 ◽  
Author(s):  
X. Feng ◽  
K. Jansen ◽  
M. Petschlies ◽  
D. Renner
Keyword(s):  
Vacuum Polarization ◽  
Polarization Contribution

scholarly journals Hadronic Vacuum Polarization Contribution to the Anomalous Magnetic Moments of Leptons from First Principles

2018 ◽  
Vol 121 (2) ◽  
Author(s):  
Sz. Borsanyi ◽  
Z. Fodor ◽  
C. Hoelbling ◽  
T. Kawanai ◽  
S. Krieg ◽  
...  
Keyword(s):  
First Principles ◽  
Vacuum Polarization ◽  
Magnetic Moments ◽  
Polarization Contribution

scholarly journals Hadronic vacuum polarization contribution to aμ from full lattice QCD

2017 ◽  
Vol 96 (3) ◽  
Author(s):  
Bipasha Chakraborty ◽  
C. T. H. Davies ◽  
P. G. de Oliveira ◽  
J. Koponen ◽  
G. P. Lepage ◽  
...  
Keyword(s):  
Lattice Qcd ◽  
Vacuum Polarization ◽  
Polarization Contribution

scholarly journals The hadronic vacuum polarization contribution to the muon g − 2 from lattice QCD

2017 ◽  
Vol 2017 (10) ◽  
Author(s):  
M. Della Morte ◽  
A. Francis ◽  
V. Gülpers ◽  
G. Herdoíza ◽  
G. von Hippel ◽  
...  
Keyword(s):  
Lattice Qcd ◽  
Vacuum Polarization ◽  
Polarization Contribution
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