Bai-Long Hoid

activity

20182026

most citedThe anomalous magnetic moment of the muon in the Standard Model

1.2k citations · 2.6k across the 21 of their papers we have counts for

collaborators

22 papers

hep-ph2026

Dispersive analysis of the $J / ψ \to γ π^{0} π^{0}$ process

Bai-Long Hoid, Igor Danilkin, Anna Testa +1

We present a dispersive amplitude analysis of the low-energy $π^{0} π^{0}$ system in the radiative decay $J / ψ \to γ π^{0} π^{0}$ , using the mass-independent BESIII $0^{++}$ and $2^{++}$ intensi…

hep-ph2026

Dispersive analysis of the $ϕ \to γ π^{0} π^{0}$ process

Bai-Long Hoid, Igor Danilkin, Marc Vanderhaeghen

We present an analysis of the radiative decay $ϕ \to γ π^{0} π^{0}$ in a dispersive framework, where the two-pion subsystem undergoes strong final-state interactions that cover the $f_0(…

hep-ph2025★ 1 cited

Improved Standard-Model predictions for $η^{(')} \to ℓ^{+} ℓ^{-}$

Noah Messerli, Martin Hoferichter, Bai-Long Hoid +2

The rare decays $η^{(')} \to ℓ^{+} ℓ^{-}$ , $ℓ \in {e, μ}$ , are highly suppressed in the Standard Model, both by their chirality structure and the required loop attaching the…

hep-lat2025

Modified Lüscher zeta-function and the modified effective range expansion in the presence of a long-range force

Rishabh Bubna, Hans-Werner Hammer, Bai-Long Hoid +3

An efficient numerical algoritm is proposed for the calculation of the modified Lüscher zeta-function in the presence of a long-range force. Using the formalism developed in Ref.~\…

hep-ph2025★ 134 cited

The anomalous magnetic moment of the muon in the Standard Model: an update

R. Aliberti, T. Aoyama, E. Balzani +232

We present the current Standard Model (SM) prediction for the muon anomalous magnetic moment, $a_{μ}$ , updating the first White Paper (WP20) [1]. The pure QED and electroweak contrib…

hep-ph2025★ 2 cited

Extracting the chiral anomaly from $e^{+} e^{-} \to 3 π$

Martin Hoferichter, Bai-Long Hoid, Bastian Kubis

The strength of the interaction of three pions and a photon, $F_{3 π}$ is predicted by the axial anomaly in terms of the pion decay constant, a relation that is frequently used to c…

hep-ph2025

Kaon Physics: A Cornerstone for Future Discoveries

Jason Aebischer, Atakan Tugberk Akmete, Riccardo Aliberti +153

The kaon physics programme, long heralded as a cutting-edge frontier by the European Strategy for Particle Physics, continues to stand at the intersection of discovery and innovati…

hep-ph2024★ 25 cited

Dispersion relation for hadronic light-by-light scattering: $η$ and $η^{'}$ poles

Simon Holz, Martin Hoferichter, Bai-Long Hoid +1

The pseudoscalar-pole contributions to hadronic light-by-light scattering are determined by the respective transition form factors (TFFs) into two virtual photons. These TFFs const…

hep-ph2024★ 16 cited

Precision evaluation of the $η$ - and $η^{'}$ -pole contributions to hadronic light-by-light scattering in the anomalous magnetic moment of the muon

Simon Holz, Martin Hoferichter, Bai-Long Hoid +1

Next to the $π^{0}$ pole, $η$ and $η^{'}$ intermediate states give rise to the leading singularities of the hadronic light-by-light tensor, resulting in sizable contributions to the ano…

hep-lat2023★ 2 cited

Comparing phenomenological estimates of dilepton decays of pseudoscalar mesons with lattice QCD

Bai-Long Hoid, Martin Hoferichter, Jacobo Ruiz de Elvira

Dilepton decays of pseudoscalar mesons have been drawing particular interest, thanks to their sensitivity to both the QCD dynamics at low energy and also signals beyond the Standar…

hep-ph2023★ 4 cited

Workshop summary -- Kaons@CERN 2023

G. Anzivino, S. Arguedas Cuendis, V. Bernard +60

Kaon physics is at a turning point -- while the rare-kaon experiments NA62 and KOTO are in full swing, the end of their lifetime is approaching and the future experimental landscap…

hep-ph2023★ 10 cited

Improved Standard-Model prediction for $K_{L} \to ℓ^{+} ℓ^{-}$

Martin Hoferichter, Bai-Long Hoid, Jacobo Ruiz de Elvira

We present a comprehensive calculation of the $K_{L} \to γ^{*} γ^{*}$ form factor in dispersion theory, using input from the leptonic decays $K_{L} \to ℓ^{+} ℓ^{-} γ$ , $K_L\to \ell_1^+\ell_1^-\…

hep-ph2023★ 34 cited

Isospin-breaking effects in the three-pion contribution to hadronic vacuum polarization

Martin Hoferichter, Bai-Long Hoid, Bastian Kubis +1

Isospin-breaking (IB) effects are required for an evaluation of hadronic vacuum polarization at subpercent precision. While the dominant contributions arise from the $e^+e^-\toπ^+π…

hep-ph2023★ 37 cited

A phenomenological estimate of isospin breaking in hadronic vacuum polarization

Martin Hoferichter, Gilberto Colangelo, Bai-Long Hoid +5

Puzzles in the determination of the hadronic-vacuum-polarization contribution currently impede a conclusive interpretation of the precision measurement of the anomalous magnetic mo…

hep-ph2022

Chiral extrapolation of hadronic vacuum polarization and isospin-breaking corrections

Martin Hoferichter, Gilberto Colangelo, Bai-Long Hoid +4

By far the biggest contribution to hadronic vacuum polarization (HVP) arises from the two-pion channel. Its quark-mass dependence can be evaluated by combining dispersion relations…

hep-ph2022

Prospects for precise predictions of $a_{μ}$ in the Standard Model

G. Colangelo, M. Davier, A. X. El-Khadra +79

We discuss the prospects for improving the precision on the hadronic corrections to the anomalous magnetic moment of the muon, and the plans of the Muon $g - 2$ Theory Initiative to…

hep-ph2021★ 25 cited

Improved Standard-Model prediction for $π^{0} \to e^{+} e^{-}$

Martin Hoferichter, Bai-Long Hoid, Bastian Kubis +1

We present an improved Standard-Model (SM) prediction for the dilepton decay of the neutral pion. The loop amplitude is determined by the pion transition form factor for $π^0\toγ^*…

hep-ph2020★ 67 cited

Hadronic vacuum polarization and vector-meson resonance parameters from $e^{+} e^{-} \to π^{0} γ$

Bai-Long Hoid, Martin Hoferichter, Bastian Kubis

We study the reaction $e^{+} e^{-} \to π^{0} γ$ based on a dispersive representation of the underlying $π^{0} \to γ γ^{*}$ transition form factor. As a first application, we evaluate the contributi…

hep-ph2020★ 1.2k cited

The anomalous magnetic moment of the muon in the Standard Model

T. Aoyama, N. Asmussen, M. Benayoun +129

We review the present status of the Standard Model calculation of the anomalous magnetic moment of the muon. This is performed in a perturbative expansion in the fine-structure con…

hep-ph2019★ 430 cited

Three-pion contribution to hadronic vacuum polarization

Martin Hoferichter, Bai-Long Hoid, Bastian Kubis

We address the contribution of the $3 π$ channel to hadronic vacuum polarization (HVP) using a dispersive representation of the $e^{+} e^{-} \to 3 π$ amplitude. This channel gives the seco…

hep-ph2018★ 429 cited

Dispersion relation for hadronic light-by-light scattering: pion pole

Martin Hoferichter, Bai-Long Hoid, Bastian Kubis +2

The pion-pole contribution to hadronic light-by-light scattering in the anomalous magnetic moment of the muon $(g - 2)_{μ}$ is fully determined by the doubly-virtual pion transition fo…

hep-ph2018★ 163 cited

Pion-pole contribution to hadronic light-by-light scattering in the anomalous magnetic moment of the muon

Martin Hoferichter, Bai-Long Hoid, Bastian Kubis +2

The $π^{0}$ pole constitutes the lowest-lying singularity of the hadronic light-by-light (HLbL) tensor, and thus provides the leading contribution in a dispersive approach to HLbL sc…

Dispersive analysis of the J/ψ→γπ0π0 process

Dispersive analysis of the ϕ→γπ0π0 process

Improved Standard-Model predictions for η(′)→ℓ+ℓ−