[PDF] Top 20 Perspectives on the hadronic contribution to the muon g − 2

... The evaluation of the contributions at one loop com- ing from the electroweak sector [9] go back to the first loop calculations done within Weinberg’s model for lep- tons [24]. The two-loop corrections were addressed ... See full document

... The CERN 150-GeV muon beam M2 has the charac- teristics needed for such a measurement. The beam in- tensity provides the required event yield. Its time struc- ture allows to tag the incident muon while ... See full document

... Another requirement for reaching very high accuracy is to measure all the relevant contributions to systematic uncertainties from the data themselves. An important ef- fect, which distinguishes the normalization from the ... See full document

... Q 2 of about 2 GeV 2 the results are very close to the predictions of perturbative ...quark contribution to the muon’s anomalous magnetic ... See full document

... (a) Hadronic Vac- uum Polarization (HVP) of order O(α 2 ), O(α 3 ), O(α 4 ); (b) Hadronic Light-by-Light (HLbL) scattering at O(α 3 ); (c) hadronic e ff ects at O (α G F m 2 μ ) ... See full document

... The hadronic contribution represents the largest uncertainty of the SM value and is comparable with the experimental ...the g-2 experiments at Fermilab and J-PARC will reach the unprecedented ... See full document

... Comparison between the results of BESIII and those from other groups – SND [13], CMD-2 [14], BaBar and KLOE shows that there are local discrepancies between the data of BaBar, KLOE and BESIII. This can be seen ... See full document

... the hadronic contributions from vacuum polar- ization (HVP) and light-by-light scattering (HLbL) have large uncertainties, which make it difficult to interpret the deviation as a clear sign of physics beyond the ... See full document

... the hadronic contribution to the running of the effective fine-structure constant at space- like momenta, can be further formulated in terms of the Adler function [26], defined as the logarithmic derivative of ... See full document

... perturbative hadronic physics. This is particularly true for the hadronic contribution to the light-by-light (HLbL) scattering Feyn- man diagram of ... See full document

... leading-order hadronic contribution to the muon ...the hadronic contribution to anomalous muon magnetic moment will provide an independent determination, competitive with the ... See full document

... leading hadronic contribution HPV from the photon vac- uum polarization is dominated by the e + e − → π + π − channel to about ...to 2 GeV region by exclusive chan- nel data as listed in Table ... See full document

... Abstract. Soon, new experiments at FNAL and J-PARC will measure the muon anoma- lous magnetic moments with better accuracy than before. From theoretical side, the un- certainty of the standard model prediction is ... See full document

... the muon has served for many years as a precision test of the Standard Model [1–4] and it has also played an important role in many presentations at this ...from hadronic vacuum polarization (HVP) and ... See full document

... In view of the upcoming two complementary experiments, one at Fermilab working with ultra hot muons and the other at J-PARC operating with ultra cold muons (very different radiation effects), the big challenge is to keep ... See full document

... It would be interesting to consider the case in which extrapolation from larger than physical pion masses is combined with direct computation near the physical pion mass in order to reduce the total error on the final ... See full document

... the contribution of an intermediate state decreases as the corresponding threshold ...pion-pole contribution is the dominating one overall and is more important than that of other single-particle ... See full document

... We thus need to go beyond ChPT since we need high energies and beyond perturbative QCD since we need low energies for the hadronic quantities. The main options are experiment, dispersion relations, lattice QCD and ... See full document

... Within our dispersive formalism, the definitions of both the pion-pole and pion-box topologies are unambiguous. By constructing a Mandelstam representation for the scalar functions, we prove that the box topologies ... See full document

... where the statistical and systematic errors have been estimated via the “extended frequentist’s method” which combines the standard bootstrap technique with a number of procedural variations in the analy- sis. The ... See full document