Autor(es)

Benton, Genessa ; Boito, Diogo ; Golterman, Maarten ; Keshavarzi, Alexander ; Maltman, Kim ; Peris, Santiago

• Tipo de documento: Artigo Científico
• Fonte: PHYSICAL REVIEW D; v. 111, n. 3, p. 18-pg., 2025-02-01.

Resumo

A key issue affecting the attempt to reduce the uncertainty on the Standard Model prediction for the muon anomalous magnetic moment is the current discrepancy between lattice-QCD and data-driven results for the hadronic vacuum polarization. Progress on this issue benefits from precise data-driven determinations of the isospin-limit light-quark-connected (lqc) and strange-plus-light-quark-disconnected (s + lqd) components of the related RBC/UKQCD windows. In this paper, using a strategy employed previously for the intermediate window, we provide data-driven results for the lqc and s + lqd components of the short- and long-distance RBC/UKQCD windows. Comparing these results with those from the lattice, we find significant discrepancies in the lqc parts but good agreement for the s + lqd components. We also explore the impact of recent CMD-3 e+e--* pi+pi- cross section results, demonstrating that an upward shift in the rho-peak region of the type seen in the CMD-3 data serves to eliminate the discrepancies for the lqc components without compromising the good agreement between lattice and data-driven s + lqd results. (AU)

• Processo FAPESP: 21/06756-6 - Testes do modelo padrão: QCD de precisão e g-2 do múon
• Beneficiário: Diogo Rodrigues Boito
• Modalidade de apoio: Auxílio à Pesquisa - Jovens Pesquisadores - Fase 2