Abstract
In order to fully reconstruct the gamma gamma processes (e+e- -> e+e- gamma gamma) in the energy region of the phi meson production, new detectors along the DAFNE beam line have been installed in order to detect the scattered e+e-.
Highlights
The renewed interest in γγ processes (e+e− → e+e−γ γ → e+e−X) is due to the possibility to contribute to the calculation of the hadronic Light-by-Light (LbL) scattering diagram that plays a relavant role in the theoretical evaluation of the muon anomaly, (g-2)μ
The trajectories of the off-momentum electrons from γγ events have been studied by means of a Monte Carlo (MC) simulation based on BDSIM[3], to evaluate the exit point of the scattered particles from the DAΦNE beam pipe and to find proper location for the tagger devices
The results clearly indicate the need to place two different detectors in different regions on both sides of the interaction point (IP): the Low Energy Tagger (LET) to detect leptons with energy between 150 and 400 MeV and the High Energy Tagger (HET) for those with energy greater than 420 MeV
Summary
The renewed interest in γγ processes (e+e− → e+e−γ γ → e+e−X) is due to the possibility to contribute to the calculation of the hadronic Light-by-Light (LbL) scattering diagram that plays a relavant role in the theoretical evaluation of the muon anomaly, (g-2)μ. In order to fully reconstruct the γγ processes (e+e− → e+e−γ γ ) in the energy region of the φ meson production, new detectors along the DAΦNE beam line have been installed in order to detect the scattered e+e−.
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