Model-independent extrapolation of MUonE data with Pade and D-Log approximants

Autor(es)

Boito, Diogo ; London, Cristiane Y. ; Masjuan, Pere ; Rojas, Camilo

• Tipo de documento: Artigo Científico
• Fonte: PHYSICAL REVIEW D; v. 110, n. 7, p. 18-pg., 2024-10-10.

Resumo

The MUonE experiment is designed to extract the hadronic contribution to the electromagnetic coupling in the spacelike region alpha had(t) from elastic e mu scattering. The leading-order hadronic vacuum polarization contribution to the muon g - 2, aHVP'LO mu , can then be obtained from a weighted integral over alpha had(t). This, however, requires knowledge of alpha had(t) in the whole domain of integration, which cannot be achieved by experiment. In this work, we propose to use Pade<acute accent> and D-Log Pade<acute accent> approximants as a systematic and modelindependent method to fit and reliably extrapolate the future MUonE experimental data, extracting aHVP'LO with a conservative but competitive uncertainty, using no or very limited external information. The method relies on fundamental analytic properties of the two-point correlator underlying aHVP'LO and upper bounds for the result for aHVP'LO mu . We demonstrate the reliability of the method using toy datasets generated from a model for alpha had(t) reflecting the expected statistics of the MUonE experiment. (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
• Processo FAPESP: 20/15532-1 - Interação quark-antiquark: a massa do quark top e o propagador do glúon no infra-vermelho
• Beneficiário: Cristiane Yumi Mise London
• Modalidade de apoio: Bolsas no Brasil - Doutorado
• Processo FAPESP: 22/02328-2 - Aproximantes racionais em g-2 do múon
• Beneficiário: Cristiane Yumi Mise London
• Modalidade de apoio: Bolsas no Exterior - Estágio de Pesquisa - Doutorado