The Evaluation of the Leading Hadronic Contribution to the Muon g-2: Consolidation of the MUonE Experiment and Recent Developments in Low Energy e+ e- Data

3 Jun 2024, 09:00 → 7 Jun 2024, 16:00 Europe/Berlin

2413/2-430 - MITP Seminar Room (MITP - Mainz Institute for Theoretical Physics, Johannes Gutenberg University Mainz)

The aim of the Topical Workshop is to assess the state of the art of the theoretical determination of the muon anomalous magnetic moment, a_μ, in view of the new measurements of the E989 Muon g-2 experiment at Fermilab and the new approach under development by the E34 collaboration at J-PARC. The workshop will focus on a_μ^HLO, the leading hadronic contribution to the muon g-2, both analyzing the most recent experimental and theoretical results for its determination and the development of the Radiative Corrections and Monte Carlo tools for low energy e⁺e^- to hadrons data.

Particular attention will be devoted to MUonE, a recently proposed experiment at CERN which aims at measuring the running of the electromagnetic coupling constant in the spacelike region by scattering high-energy muons on atomic electrons of a low-Z target through the process μe → μe. The differential cross section of this process provides the direct measurement of a_μ^HLO and, therefore, an independent determination of the theoretical prediction for a_μ competitive with the timelike dispersive approach.

The workshop follows the successful Topical Workshops held at MITP in 2018 and 2022. 

Monday, 3 June

1 Welcome from MITP Director

Speaker: Matthias Neubert (Johannes Gutenberg University Mainz)

2 The Standard Model prediction of the muon g-2

Speaker: Marc Knecht

3 Muon g-2: experimental status

Speaker: Anna Driutti

4 Status of the MUonE experiment

Speaker: Riccardo Nunzio Pilato

12:10 Lunch

5 Theory for MUonE

Speaker: Fulvio Piccinini

6 Atomic binding corrections for fixed target muon-electron scattering

Speaker: Ryan Plestid

15:05 Coffee break

Tuesday, 4 June

7 MESMER status and backgrounds implementation

Speakers: Andrea Gurgone, Ettore Budassi

8 McMule for MUonE and related topics

Speaker: Marco Rocco

11:00 Coffee break

9 N3LO for MUonE

Speaker: Matteo Fael

12:10 Lunch

10 Status of MUonE analysis and first results from the 2023 test run

Speaker: Giovanni Abbiendi

11 An alternative approach to extract hadronic \Delta\alpha from MUonE data

Speaker: Riccardo Nunzio Pilato

14:50 Coffee bream

12 NLO and NNLO HVP contributions to the muon g-2

Speaker: Stefano Laporta

13 Numerical evaluation of NNLO interferences

Speaker: Jonathan Ronca

Wednesday, 5 June

14 Status of the hadronic corrections to the muon g-2

Speakers: Gilberto Colangelo, Martin Hoferichter

15 An overview of lattice QCD+QED progress for the hadronic vacuum polarization contribution to the muon g-2

Speaker: Davide Giusti

16 Dispersion relations and radiative corrections for the two-pion channel

Speaker: Peter Stoffer

11:00 Coffee break

17 Strong2020 activities

Speaker: Adrian Signer

18 Monte Carlo comparisons

Speaker: Yannick Ulrich

12:50 Lunch

19 Pion Form Factor implementation for MCs

Speaker: Andrea Gurgone

20 General discussion on Strong2020 report

Speaker: All All

15:50 Coffee break

Thursday, 6 June

21 Status of hadronic cross section experiments at low energy e+e- machines

Speaker: Achim Denig

22 MC codes overview and news for Strong2020

Speakers: Alan Price, Fedor Ignatov, Francesco Pio Ucci, Fulvio Piccinini, Jeremi Paltrinieri, Lorenzo Cotrozzi, Pau Petit Rosas, Sophie Kollatzsch

11:00 Coffee break

23 MC codes overview and news for Strong2020

Speakers: Alan Price, Fedor Ignatov, Francesco Pio Ucci, Fulvio Piccinini, Jeremi Paltrinieri, Lorenzo Cotrozzi, Pau Petit Rosas, Sophie Kollatzsch

12:30 Lunch

24 Muon g-2 at JPARC (remote)

Speaker: Cedric Zhang

25 Model-independent extrapolation of MUonE data with D-Log approximants (remote)

Speaker: Pere Masjuan

Friday, 7 June

26 Workshop wrap-up and general discussion

Speaker: All All