A 5D, polarised, Bethe-Heitler event generator for $\gamma \to e^{+}{e}^{-}$ conversion

Abstract

We describe a new version of the 5D, exact, polarised, Bethe-Heitler event generator of $\gamma$-ray conversions to $e^{+}{e}^{-}$, developed in the context of the HARPO project, that is able to simulate successive events with different photon energies and on different atomic targets without any substantial CPU overhead. The strong correlation between kinematic variables in the divergence of the five-dimensional differential cross section are mitigated by performing each step of the conversion in the appropriate Lorentz frame. We extend the verification range down to 1 keV above threshold and up to 1 EeV. This work could pave the way to the precise simulation of the high-performance $\gamma$-ray telescopes and polarimeters of the post-Fermi-LAT area.

Submitted to Nucl. Instrum. Meth. A

References in corpus (3)

• Performance measurement of HARPO: a Time Projection Chamber as a gamma-ray telescope and polarimeter
• $\gamma$-ray polarimetry with conversions to $e^{+}{e}^{-}$ pairs: polarization asymmetry and the way to measure it
• gamma-ray telescopes using conversions to electron-positron pairs: event generators, angular resolution and polarimetry

Cited by in corpus (7)

• Massive Argon Space Telescope (MAST): a concept of heavy time projection chamber for gamma-ray astronomy in the 100 MeV --- 1 TeV energy range
• HARPO, a gas TPC active target for high-performance $\gamma$-ray astronomy; demonstration of the polarimetry of MeV $\gamma$-rays converting to $e^{+}{e}^{-}$ pair
• Gamma-Ray Polarimetry
• MeV-GeV Polarimetry with $\gamma \to e^{+}{e}^{-}$: Asserting the Performance of Silicon Strip Detectors-Based Telescopes
• Pair invariant mass spectrum and polarization asymmetry in the event generation of gamma-ray conversions
• A 5D, polarised, Bethe-Heitler event generator for $\gamma \to {\mu }^{+}{\mu }^{-}$ conversion
• An electromagnetic physics constructor for low energy polarised X-/gamma ray transport in Geant4