C++ implementation of Bethe–Heitler, 5D, polarized, $\gamma{\to}e^+e^-$ pair conversion event generator

I. Semeniouk (1) , D. Bernard (1)

1 LLR - Laboratoire Leprince-Ringuet

We present the C++ implementation of an event generator for linearly-polarized gamma-ray conversions to γ→e+e− pairs. The generator uses the full 5D Bethe–Heitler probability density function for the generation of the γ→e+e− pair and for the recoil of the target nucleus. The same code is used for triplet generation. We present a verification of the model by comparing sample distributions with theoretical predictions.

Mots clés: recoil; density; triplet; gamma ray; electron: pair production; numerical calculations: Monte Carlo; nucleus: target; Bethe-Heitler; Gamma rays; Bethe–Heitler; Geant4; Polarized; Event generator; Pair conversion

Domaines: Informatique [cs]; Physique des Hautes Energies - Expérience [hep-ex]

I. Semeniouk, D. Bernard. C++ implementation of Bethe–Heitler, 5D, polarized, $\gamma{\to}e^+e^-$ pair conversion event generator. 14th Pisa Meeting on Advanced Detectors, May 2018, La Biodola-Isola d'Elba, Italy. pp.290-291, ⟨10.1016/j.nima.2018.09.154⟩. ⟨hal-02188316⟩