M. Vanderhaeghen

activity

20142026

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

134 citations · 179 across the 13 of their papers we have counts for

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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

Simultaneous Dalitz-plot decomposition of the $e^{+} e^{-} \to J / ψ π π (K K ˉ)$ processes in the 4.13-4.36 GeV region using dispersive final-state interactions

Viktoriia Ermolina, Igor Danilkin, Marc Vanderhaeghen

We present a joint analysis of the processes $e^{+} e^{-} \to J / ψ π^{+} π^{-}$ and $e^{+} e^{-} \to J / ψ K^{+} K^{-}$ at center-of-mass energies from 4.13 to 4.36 GeV. The amplitudes are constructed usin…

hep-ph2026

Sensitivity of MAGIX@MESA to BSM effects via Bethe-Heitler pair production

Aleksandr Pustyntsev, Marc Vanderhaeghen

We explore the sensitivity of the upcoming MAGIX experiment at the MESA facility to light Beyond the Standard Model (BSM) mediators in the few to hundred MeV mass range. Utilizing…

hep-ph2026

Subtracted Dispersion Relations for Virtual Compton Scattering off the Proton

I. Danilkin, B. Pasquini, M. Ronchi +1

We present a once-subtracted dispersion relation (DR) formalism for the virtual Compton scattering (VCS) process from threshold up to the $Δ (1232)$ energy region. The formalism aim…

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

Coupled-channel Omnès matrix for the $D$ -wave isoscalar $π π / K K ˉ$ system and its application to $J / ψ \to π^{0} π^{0} γ, K_{S} K_{S} γ$

Igor Danilkin, Oleksandra Deineka, Emilie Passemar +1

In this work, we construct the $D$ -wave isoscalar $π π / K K ˉ$ coupled-channel Omnès matrix, formulated to satisfy unitarity, analyticity, and the appropriate asymptotic behavior.…

hep-ph2025★ 1 cited

New Physics Searches via Beam Normal Spin Asymmetry in Bhabha Scattering

Aleksandr Pustyntsev, Muthubharathi S. Ramasamy, Marc Vanderhaeghen

We examine the sensitivity of the beam normal spin asymmetry in Bhabha scattering to beyond the Standard Model (BSM) mediators, in the context of the JLab polarized positron progra…

hep-ph2025

HadroTOPS: A Monte Carlo Event Generator For Hadron Production In Two-Photon Scattering In Electron Positron Collisions

Max Lellmann, Igor Danilkin, Achim Denig +4

We present a Monte Carlo event generator specifically developed for the study of hadronic two-photon fusion events in two-photon scattering at electron-positron colliders. The code…

hep-ph2025★ 2 cited

Implications of recent $(g - 2)_{μ}$ measurements for MeV-GeV dark sector searches

Aleksandr Pustyntsev, Marc Vanderhaeghen

Recent theoretical and experimental studies of the muon magnetic moment indicate the absence of the previously reported discrepancy, providing a vital opportunity to constrain pote…

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

The all-charm tetraquark and its contribution to two-photon processes

Panagiotis Kalamidas, Marc Vanderhaeghen

Prompted by several potential tetraquark states that have been reported by the LHCb, CMS and ATLAS collaborations in the di- $J /Ψ$ and $J /ΨΨ (2 S)$ spectra, we investigate their contr…

hep-ph2024

Dalitz-plot decomposition for the $e^{+} e^{-} \to J / ψ π π (K K ˉ)$ and $e^{+} e^{-} \to h_{c} π π$ processes

Viktoriia Ermolina, Igor Danilkin, Marc Vanderhaeghen

We present an analysis of the $e^{+} e^{-} \to γ^{*} \to J / ψ π π (K K ˉ)$ and $e^{+} e^{-} \to γ^{*} \to h_{c} π π$ processes employing the recently proposed Dalitz-plot decomposi…

hep-ph2014★ 42 cited

Two-photon exchange corrections in elastic muon-proton scattering

O. Tomalak, M. Vanderhaeghen

We extend the general formalism of two-photon exchange to elastic lepton-nucleon scattering by accounting for all lepton mass terms. We then perform a numerical estimate of the muo…

Dispersive analysis of the J/ψ→γπ0π0 process

Simultaneous Dalitz-plot decomposition of the e+e−→J/ψππ(KKˉ) processes in the 4.13-4.36 GeV region using dispersive final-state interactions

Sensitivity of MAGIX@MESA to BSM effects via Bethe-Heitler pair production

Subtracted Dispersion Relations for Virtual Compton Scattering off the Proton

Dispersive analysis of the ϕ→γπ0π0 process

Coupled-channel Omnès matrix for the D-wave isoscalar ππ/KKˉ system and its application to J/ψ→π0π0γ,KS​KS​γ

New Physics Searches via Beam Normal Spin Asymmetry in Bhabha Scattering

HadroTOPS: A Monte Carlo Event Generator For Hadron Production In Two-Photon Scattering In Electron Positron Collisions

Implications of recent (g−2)μ​ measurements for MeV-GeV dark sector searches

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

The all-charm tetraquark and its contribution to two-photon processes

Dalitz-plot decomposition for the e+e−→J/ψππ(KKˉ) and e+e−→hc​ππ processes

Two-photon exchange corrections in elastic muon-proton scattering

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

Simultaneous Dalitz-plot decomposition of the $e^{+} e^{-} \to J / ψ π π (K K ˉ)$ processes in the 4.13-4.36 GeV region using dispersive final-state interactions

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

Coupled-channel Omnès matrix for the $D$ -wave isoscalar $π π / K K ˉ$ system and its application to $J / ψ \to π^{0} π^{0} γ, K_{S} K_{S} γ$

Implications of recent $(g - 2)_{μ}$ measurements for MeV-GeV dark sector searches

Dalitz-plot decomposition for the $e^{+} e^{-} \to J / ψ π π (K K ˉ)$ and $e^{+} e^{-} \to h_{c} π π$ processes