2025-12-11
10:11 |
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Precision physics and the hadronic running of $\alpha$: a lattice perspective
/ Conigli, Alessandro (speaker)
Precision measurements are a powerful tool in the search for physics beyond the Standard Model, and their impact is often limited by our control of hadronic effects. After a brief mention of the muon $g-2$ anomaly as an example of this challenge, I will focus on the closely related quantity $\Delta\alpha_{\mathrm{had}}^{(5)}(M_Z^2)$, the hadronic contribution to the running of the electromagnetic coupling. I will present a recent high-precision lattice QCD determination of the hadronic vacuum polarization in the Euclidean region, achieving sub-percent accuracy and confirming tensions at space-like virtualities with data-driven estimates based on $e^+ e^-$ cross sections. Using the Euclidean split technique, we obtain a precise determination of the running of $\alpha$ up to the $Z$-pole and compare it with global electroweak fits. I will conclude with an outlook on future improvements and the precision targets set by the FCC-ee program [...]
2025 - 3502.
Theory Colloquia
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In : Precision physics and the hadronic running of $\alpha$: a lattice perspective
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2025-12-09
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2025-12-04
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Discussion
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Conferences, Workshops & Schools; Light ion collisions at the LHC - 2025
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In : Light ion collisions at the LHC - 2025
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2025-12-04
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