Large-angle Bhabha scattering and luminosity at flavour factories

C. M. Carloni Calame, C. Lunardini, G. Montagna, O. Nicrosini, F. Piccinini

Research output: Contribution to journalArticlepeer-review

115 Scopus citations


The luminosity determination of electron-positron colliders operating in the region of low-lying hadronic resonances (Ecm≃1-10 GeV), such as BEPC/BES, DAΦNE, KEKB, PEP-II and VEPP-2M, requires the precision calculation of the Bhabha process at large scattering angles. In order to achieve a theoretical accuracy at a few 0.1% level, the inclusion of radiative corrections is mandatory. The phenomenologically relevant effect of QED corrections is taken into account in the framework of the Parton Shower (PS) method, which is employed both for cross section calculation and event generation. To test the reliability of the approach, a benchmark calculation, including exact O(α) corrections and higher-order leading logarithmic contributions, is developed as well and compared in detail with the PS predictions. The effect of O(α) next-to-leading and higher-order leading corrections is investigated in the presence of realistic event selections for the Bhabha process at the Φ factories. A new Monte Carlo generator for data analysis (BABAYAGA) is presented, with an estimated accuracy of 0.5%. Possible developments aiming at improving its precision and range of applicability are discussed.

Original languageEnglish (US)
Pages (from-to)459-479
Number of pages21
JournalNuclear Physics B
Issue number1-2
StatePublished - Sep 18 2000
Externally publishedYes


  • 02.70.Lq
  • 12.20.Ds
  • 13.10.+q
  • Bhabha scattering
  • Electron-positron collision
  • Flavour factories
  • Monte Carlo
  • Parton Shower
  • Radiative corrections

ASJC Scopus subject areas

  • Nuclear and High Energy Physics


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