Pair invariant mass spectrum and polarization asymmetry in the event generation of gamma-ray conversions

D. Bernard

doi:10.1016/j.nima.2021.165163

Pair invariant mass spectrum and polarization asymmetry in the event generation of gamma-ray conversions

D. Bernard

Research output: Contribution to journal › Article › peer-review

Abstract

We examine the dielectron invariant mass spectrum and the variation of the polarization asymmetry as a function of that mass in the event generator of the five-dimensional Bethe–Heitler differential cross section of the conversion of linearly polarized photons that we have implemented recently as a Geant4 Physics Model. We compare the results obtained with simulated samples to analytical expressions. Studies of b→sγ decays at LHC and Belle II experiments could provide hints of physics beyond the standard model in flavor-changing neutral current processes; issues have been reported in the simulation of the properties of the background induced by genuine γ-ray conversions in their detectors. Our results demonstrate that using the five-dimensional model would help solve these issues.

Original language	English
Article number	165163
Journal	Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Volume	997
DOIs	https://doi.org/10.1016/j.nima.2021.165163
Publication status	Published - 1 May 2021

Keywords

Dielectron
Gamma rays
Geant4
Pair conversion
Polarization
Radiative decays

Access to Document

10.1016/j.nima.2021.165163

Cite this

@article{2bbc9a6bd85044948dae942e54f53735,

title = "Pair invariant mass spectrum and polarization asymmetry in the event generation of gamma-ray conversions",

abstract = "We examine the dielectron invariant mass spectrum and the variation of the polarization asymmetry as a function of that mass in the event generator of the five-dimensional Bethe–Heitler differential cross section of the conversion of linearly polarized photons that we have implemented recently as a Geant4 Physics Model. We compare the results obtained with simulated samples to analytical expressions. Studies of b→sγ decays at LHC and Belle II experiments could provide hints of physics beyond the standard model in flavor-changing neutral current processes; issues have been reported in the simulation of the properties of the background induced by genuine γ-ray conversions in their detectors. Our results demonstrate that using the five-dimensional model would help solve these issues.",

keywords = "Dielectron, Gamma rays, Geant4, Pair conversion, Polarization, Radiative decays",

author = "D. Bernard",

note = "Publisher Copyright: {\textcopyright} 2021 Elsevier B.V.",

year = "2021",

month = may,

day = "1",

doi = "10.1016/j.nima.2021.165163",

language = "English",

volume = "997",

journal = "Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment",

issn = "0168-9002",

}

TY - JOUR

T1 - Pair invariant mass spectrum and polarization asymmetry in the event generation of gamma-ray conversions

AU - Bernard, D.

PY - 2021/5/1

Y1 - 2021/5/1

N2 - We examine the dielectron invariant mass spectrum and the variation of the polarization asymmetry as a function of that mass in the event generator of the five-dimensional Bethe–Heitler differential cross section of the conversion of linearly polarized photons that we have implemented recently as a Geant4 Physics Model. We compare the results obtained with simulated samples to analytical expressions. Studies of b→sγ decays at LHC and Belle II experiments could provide hints of physics beyond the standard model in flavor-changing neutral current processes; issues have been reported in the simulation of the properties of the background induced by genuine γ-ray conversions in their detectors. Our results demonstrate that using the five-dimensional model would help solve these issues.

AB - We examine the dielectron invariant mass spectrum and the variation of the polarization asymmetry as a function of that mass in the event generator of the five-dimensional Bethe–Heitler differential cross section of the conversion of linearly polarized photons that we have implemented recently as a Geant4 Physics Model. We compare the results obtained with simulated samples to analytical expressions. Studies of b→sγ decays at LHC and Belle II experiments could provide hints of physics beyond the standard model in flavor-changing neutral current processes; issues have been reported in the simulation of the properties of the background induced by genuine γ-ray conversions in their detectors. Our results demonstrate that using the five-dimensional model would help solve these issues.

KW - Dielectron

KW - Gamma rays

KW - Geant4

KW - Pair conversion

KW - Polarization

KW - Radiative decays

U2 - 10.1016/j.nima.2021.165163

DO - 10.1016/j.nima.2021.165163

M3 - Article

AN - SCOPUS:85101618056

SN - 0168-9002

VL - 997

JO - Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

JF - Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

M1 - 165163

ER -

Pair invariant mass spectrum and polarization asymmetry in the event generation of gamma-ray conversions

Abstract

Keywords

Access to Document

Fingerprint

Cite this