skip to main content
Idioma:
Primo Search
Clear Search Box
Search in: Busca Geral
Busca Avançada
Busca por Índices

Measurement of the e+e−→π+π−π0π0 cross section using initial-state radiation at BABAR

Lees, J P

Physical review. D, 2017-11, Vol.96 (9) [Periódico revisado por pares]

College Park: American Physical Society

Texto completo disponível

Citações Citado por
  • Título:
    Measurement of the e+e−→π+π−π0π0 cross section using initial-state radiation at BABAR
  • Autor: Lees, J P
  • Assuntos: Cross-sections ; Magnetic moments ; Magnetic resonance ; PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
  • É parte de: Physical review. D, 2017-11, Vol.96 (9)
  • Notas: SLAC-PUB-17147; BABAR-PUB-17/002
    AC02-76SF00515; AC02-05CH11231
    USDOE Office of Science (SC)
  • Descrição: The process e+e−→π+π−2π0γ is investigated by means of the initial-state radiation technique, where a photon is emitted from the incoming electron or positron. Using 454.3  fb−1 of data collected around a center-of-mass energy of s=10.58  GeV by the BABAR experiment at SLAC, approximately 150000 signal events are obtained. The corresponding nonradiative cross section is measured with a relative uncertainty of 3.6% in the energy region around 1.5 GeV, surpassing all existing measurements in precision. Using this new result, the channel’s contribution to the leading order hadronic vacuum polarization contribution to the anomalous magnetic moment of the muon is calculated as (gμπ+π−2π0−2)/2=(17.9±0.1stat±0.6syst)×10−10 in the energy range 0.85  GeV<ECM<1.8  GeV. In the same energy range, the impact on the running of the fine-structure constant at the Z0-pole is determined as Δαπ+π−2π0(MZ2)=(4.44±0.02stat±0.14syst)×10−4. Furthermore, intermediate resonances are studied and especially the cross section of the process e+e−→ωπ0→π+π−2π0 is measured.
  • Editor: College Park: American Physical Society
  • Idioma: Inglês
Links
Voltar para lista de resultados
Ir para página anteriorAnterior Resultado  7 AvançarIr para próxima página

  • Realização: ABCD-USP USP   Logos de Redes Sociais: Freepik

Buscando em bases de dados remotas. Favor aguardar.