Jun 24 – 28, 2019
Crowne Plaza Brussels Le Palace
Europe/Zurich timezone

Luminosity with e+e- -> gamma gamma: theory perspective

Jun 25, 2019, 5:30 PM
Eva/Inno (1st floor)


1st floor


Carlo Michel Carloni Calame (INFN, Pavia (IT))


The unprecendented precision goal of the future FCC-ee machine in key measurements in the Standard Model and beyond will require that the accelerator luminosity is know with extremely high accuracy, at the $10^{-4}$ level and even better. In this context, QED processes (and their accurate theoretical prediction) play the role of precise luminosity monitoring processes: together with the standard Bhabha scattering, used in the past at LEP and flavour factories, it is interesting and worthwhile to consider also the $e^+e^-\to\gamma\gamma$ process, which, despite a lower statistics than Bhabha, can be predicted with very high accuracy. In this presentation, the current status of $e^+e^-\to\gamma\gamma$ calculations and Monte Carlo tools will be reviewed and the perspective for future theory improvements will be traced and discussed in detail.

Primary authors

Carlo Michel Carloni Calame (INFN, Pavia (IT)) Mauro Chiesa (University of Würzburg) Guido Montagna (University of Pavia e INFN, Pavia (IT)) Oreste Nicrosini (INFN, Sezione di Pavia) Fulvio Piccinini (Universita and INFN (IT))

Presentation materials