Leading-order hadronic contribution to the electron and muon g-2

Jegerlehner, Fred

doi:10.48550/arxiv.1511.04473

Cited by 10 publications

(16 citation statements)

References 44 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Below, we include the additional contributions that needs to be incorporated on top of the pseudoscalar one. In our opinion, this requires the π, K loops, 14 the axial resonances 64 and the quark-loop, 14 necessary to provide the appropriate high-energy behavior -the scalar and tensor resonances are partially included in π, K loops. We obtain 33…”

Section: Pseudoscalar Pole Contributions To Hlblmentioning

confidence: 99%

Updated pseudoscalar contributions to the hadronic light-by-light of the muon (g − 2)

Sánchez-Puertas

Masjuan

2016

Mod. Phys. Lett. A

View full text Add to dashboard Cite

In this work, we present our recent results on a new and alternative data-driven determination for the hadronic light-by-light pseudoscalar-pole contribution to the muon (g − 2). Our approach is based on Canterbury approximants, a rational approach to describe the required transition form factors, which provides a systematic and model-independent framework beyond traditional large-Nc approaches. As a result, we obtain a competitive determination with errors according to future (g − 2) experiments including, for the first time, a well-defined systematic uncertainty.

show abstract

Section: Pseudoscalar Pole Contributions To Hlblmentioning

confidence: 99%

Updated pseudoscalar contributions to the hadronic light-by-light of the muon (g − 2)

Sánchez-Puertas

Masjuan

2016

Mod. Phys. Lett. A

View full text Add to dashboard Cite

show abstract

“…5), but there is some hint that the discrepancy is getting better at higher mass, which kind-of supports the use of pQCD for the calculation of the dispersion integral above E cut . Note that given the improvement in precision of the hadronic cross sections, the most recent prediction [15] restricts the s range over which pQCD is used to [4.5 -9.3] GeV and [13 GeV -∞[.…”

Section: Recent Babar Lo (E + E − → F γ) Resultsmentioning

confidence: 99%

Low-energy hadronic cross sections measurements at BABAR, and implication for the g-2 of the muon

Bernard¹

2016

Proceedings of XXIV International Workshop on Deep-Inelastic Scattering and Related Subjects — PoS(DIS2016)

View full text Add to dashboard Cite

The BABAR Collaboration has an intensive program studying the cross sections of hadron production in low-energy e + e − annihilation, accessible via initial-state radiation. Our measurements allow a significant improvement in the precision of the predicted value of the muon anomalous magnetic moment. These improvements are necessary for shedding light on the current > 3 sigma difference between the predicted and the experimental values. We have published results on a number of processes with two to six hadrons in the final state, and other final states are currently under investigation. We report here on the most recent results obtained by analysing the entire BABAR dataset. DIS2016, 24th workshop onDeep-Inelastic Scattering and Related Subjects. 11-15 April 2016, DESY Hamburg arXiv:1604.07641v2 [hep-ex]

show abstract

“…4), but there is some hint that the discrepancy is getting better at higher mass, which kind-of supports the use of pQCD for the calculation of the dispersion integral above E cut . Note that given the improvement in precision of the hadronic cross sections, the most recent prediction [16] restricts the s range over which pQCD is used to [4.5 -9.3] GeV and [13 GeV -∞[. ).…”

Section: Top)mentioning

confidence: 99%

“…• Thanks to the high-precision results obtained up to the end of 2014, the uncertainty on a VP µ is now smaller than 4 × 10 −10 [16]. That work includes a NNLO correction for a VP µ [17] and a NLO contribution to a LbL µ [18].…”

Section: Channelsmentioning

confidence: 99%

See 1 more Smart Citation

Low-energy hadronic cross sections measurements at BaBar and g − 2 of the muon

Bernard

2017

Nuclear and Particle Physics Proceedings

View full text Add to dashboard Cite

Even though the standard model of particle physics has been tested in depth by several generations of researchers and has been found to be completely standard, some hints of new physics are cropping out here and there, most notably the long-pending 3-ish standard deviation discrepancy between the predictions and the measurement of the muon anomalous magnetic moment a µ . The experimental information originates from one single precise measurement, while the prediction uncertainty is dominated by two main contributions, the hadronic vacuum polarization (VP) modification of the photon propagator and the hadronic light-by-light scattering (LbL). The leading-order (LO) VP contribution to a µ is obtained using the dispersion relation and the optical theorem as the integral as a function of energy of an expression that involves the ratio of the e + e − → hadrons cross section to the pointlike muon pair cross section. The former is extracted from experimental data for individual hadronic final states at low energies, and from perturbative QCD at high energies.arXiv:1607.07181v1 [hep-ex]

show abstract

Leading-order hadronic contribution to the electron and muon g-2

Cited by 10 publications

References 44 publications

Updated pseudoscalar contributions to the hadronic light-by-light of the muon (g − 2)

Updated pseudoscalar contributions to the hadronic light-by-light of the muon (g − 2)

Low-energy hadronic cross sections measurements at BABAR, and implication for the g-2 of the muon

Low-energy hadronic cross sections measurements at BaBar and g − 2 of the muon

Contact Info

Product

Resources

About