Pseudoscalar transition form factors and the hadronic light-by-light contribution to the muon g-2

2021/12/15 by Antoine Gérardin, Gérardin, Antoine, Jana N. Guenther +5
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Lattice (hep-lat) #High Energy Physics - Phenomenology (hep-ph) #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions

paper · doi:10.48550/arxiv.2112.08101

openalex publication_date 2021/12/15 · openalex created_date 2022/05/05 · openalex updated_date 2026/07/28

Abstract

We present preliminary results from our calculation of the pseudoscalar transition form factors of the η and η' mesons using staggered quarks on N_f=2+1+1 gauge ensembles generated by the Budapest-Marseille-Wuppertal collaboration. These transition form factors are an important input for the hadronic light-by-light contribution to the muon (g-2). We first elaborate on the extraction of the masses of the η and η' mesons, that mix under the dynamics of QCD. Thereafter, we show our preliminary results for the pseudoscalar transition form factors, focusing on the η meson in the absence of mixing.

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