Calculation of the Hadronic Vacuum Polarization Contribution to the Muon Anomalous Magnetic Moment

Blum, Thomas; Boyle, P.A.; Gülpers, Vera; Izubuchi, Taku; Jin, Luchang; Jung, Chulwoo; Jüttner, Andreas; Lehner, Christoph; Portelli, Antonin; Tsang, Justus Tobias

doi:10.1103/physrevlett.121.022003

Cited by 333 publications

(479 citation statements)

References 55 publications

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“…where m µ is the muon mass. Comparing this to how closely the present measurement of the muon dipole magnetic moment matches Standard Model predictions [34],…”

Section: Implications For Electron and Muon Magnetic Moment Meassupporting

confidence: 59%

Anomalous anomalies from virtual black holes

Bramante

Gould

2020

Phys. Rev. D

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We investigate gravitational UV/IR mixing models that predict a breakdown of low energy effective field theory, from loop-level, non-local gravitational corrections to particle processes. We determine how the choice of IR cutoff in these theories alters predictions for lepton magnetic moments. Using Brookhaven E821 muon magnetic moment data, we exclude models of UV/IR mixing with an IR cutoff set by a spherical volume enclosing the experiment. On the other hand, an IR cutoff defined by the simply-connected spatial volume containing the trajectories of the muons, implies a correction to the muon magnetic moment which may have already been observed.

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“…where m µ is the muon mass. Comparing this to how closely the present measurement of the muon dipole magnetic moment matches Standard Model predictions [34],…”

Section: Implications For Electron and Muon Magnetic Moment Meassupporting

confidence: 59%

Anomalous anomalies from virtual black holes

Bramante

Gould

2020

Phys. Rev. D

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“…It is instructive to isolate specific ranges of Euclidean time in order to better understand their contributions to a v µ . This can be accomplished by constructing windows that suppress contributions outside of the window region [21]. Rather than using Heaviside step functions to isolate these ranges, which would have significant dependence on the lattice cutoff near the boundary of the window, a smoothed step is considered [16,51]:…”

Section: B Window Methodsmentioning

confidence: 99%

“…We will quote results both for the total contribution, corresponding to t 0 → −∞ and t 1 → ∞, as well as specific windows. It should be noted that windows of a v µ that isolate specific Euclidean distance scales can be related to specific windows of time-like s in the experimental data used in the R-ratio [21].…”

Section: B Window Methodsmentioning

confidence: 99%

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Consistency of hadronic vacuum polarization between lattice QCD and the R ratio

2020

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There are emerging tensions for theory results of the hadronic vacuum polarization contribution to the muon anomalous magnetic moment both within recent lattice QCD calculations and between some lattice QCD calculations and R-ratio results. In this paper we work towards scrutinizing critical aspects of these calculations. We focus in particular on a precise calculation of Euclidean position-space windows defined by RBC/UKQCD that are ideal quantities for cross-checks within the lattice community and with R-ratio results. We perform a lattice QCD calculation using physical up, down, strange, and charm sea quark gauge ensembles generated in the staggered formalism by the MILC collaboration. We study the continuum limit using inverse lattice spacings from a −1 ≈ 1.6 GeV to 3.5 GeV, identical to recent studies by FNAL/HPQCD/MILC and Aubin et al. and similar to the recent study of BMW. Our calculation exhibits a tension for the particularly interesting window result of a ud,conn.,isospin,W µ from 0.4 fm to 1.0 fm with previous results obtained with a different discretization of the vector current on the same gauge configurations. Our results may indicate a difficulty related to estimating uncertainties of the continuum extrapolation that deserves further attention. In this work we also provide results for a ud,conn.,isospin µ , a s,conn.,isospin µ , a SIB,conn. µ for the total contribution and a large set of windows. For the total contribution, we find a HVP LO µ = 714(27)(13)10 −10 , a ud,conn.,isospin µ = 657(26)(12)10 −10 , a s,conn.,isospin µ = 52.83(22)(65)10 −10 , and a SIB,conn. µ = 9.0(0.8)(1.2)10 −10 , where the first uncertainty is statistical and the second systematic. We also comment on finite-volume corrections for the strong-isospin-breaking corrections.

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“…The most longstanding anomaly we consider is in the anomalous magnetic moment of the muon. A recent evaluation of the standard model (SM) prediction [1] finds a 3.7σ discrepancy with the experimental measurement [2]:…”

Section: Introductionmentioning

confidence: 97%

Resolving the (g−2)μ and B anomalies with leptoquarks and a dark Higgs boson

et al. 2020

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At present there are outstanding discrepancies between standard model predictions and measurements of the muon's g − 2 and several B meson properties. We resolve these anomalies by considering a two-Higgs-doublet model extended to include leptoquarks and a dark Higgs boson S. The leptoquarks modify B meson decays and also induce an Sγγ coupling, which contributes to the muon's g − 2 through a Barr-Zee diagram. We show that, for TeV-scale leptoquarks and dark Higgs boson masses m S ∼ 10 − 200 MeV, a consistent resolution to all of the anomalies exists. The model predicts interesting new decays, such as B → K ( * ) e + e − , B → K ( * ) γγ, K → πγγ, and h → γγγγ, with branching fractions not far below current bounds.

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Calculation of the Hadronic Vacuum Polarization Contribution to the Muon Anomalous Magnetic Moment

Cited by 333 publications

References 55 publications

Anomalous anomalies from virtual black holes

Anomalous anomalies from virtual black holes

Consistency of hadronic vacuum polarization between lattice QCD and the R ratio

Resolving the (g−2)μ and B anomalies with leptoquarks and a dark Higgs boson

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