2026-04-13T03:56:20Zhttps://recercat.cat/oai/request

oai:recercat.cat:2445/2222052025-12-10T00:38:12Zcom_2072_1057col_2072_478823col_2072_478917

00925njm 22002777a 4500 dc Estrada, Emilio J. author Gonzàlez-Solís, Sergi author Guevara, Adolfo author Roig, Pablo author 2025-07-14T11:30:01Z 2025-07-14T11:30:01Z 2024-12-27 2025-07-14T11:30:01Z Working with Resonance Chiral Theory, within the two resonance multiplets saturation scheme, we satisfy leading (and some subleading) chiral and asymptotic QCD constraints and accurately fit simultaneously the π0,η,η′transition form factors, for single and double virtuality. In the latter case, we supplement the few available measurements with lattice data to ensure a faithful description. Mainly due to the new results for the doubly virtual case, we improve over existing descriptions for the η and η′. Our evaluationof the corresponding pole contributions to the hadronic light-by-light piece of the muon g−2 read: aπ0-pole µ=(61.9 ±0.6+2.4−1.5)×10−11, aη-poleµ=(15.2 ±0.5+1.1−0.8)×10−11 and aη′-poleµ=(14.2 ±0.7+1.4−0.9)×10−11, for a total of aπ0+η+η′-poleµ= (91.3 ±1.0+3.0−1.9)×10−11, where the first and second errors are the statistical and systematic uncertainties, respectively. Electrodinàmica quàntica Física nuclear Teoria quàntica de camps Quantum electrodynamics Nuclear physics Quantum field theory Improved π0,η,η′ transition form factors in resonancechiral theory and their aHLbL μ contribution