CERN Accelerating science

Article
Report number	arXiv:2202.10958
Title	Validation of e$^+$e$^-$ Pair Production Total Cross Sections for Monte Carlo Particle Transport
Author(s)	Basaglia, Tulio (CERN) ; Begalli, Marcia (Rio de Janeiro State U.) ; Choi, Chansoo (Hanyang U.) ; Han, Min Cheol (Yonsei U.) ; Hoff, Gabriela (INFN, Genoa) ; Kim, Chan Hyeong (Hanyang U.) ; Pia, Maria Grazia (INFN, Genoa) ; Saracco, Paolo (INFN, Genoa)
Publication	2022-02-24
Imprint	2022-02-22
Number of pages	13
Note	Accepted for publication in IEEE Transactions on Nuclear Science
In:	IEEE Trans. Nucl. Sci. 69 (2022) 858-870
DOI	10.1109/TNS.2022.3154104
Subject category	hep-ph ; Particle Physics - Phenomenology ; physics.comp-ph ; Other Fields of Physics
Abstract	Several sources of total cross sections for e$^+$e$^-$ pair production by photon interaction with matter, used by major Monte Carlo codes for particle transport, are quantitatively evaluated with respect to experimental measurements collected from the literature. They include data libraries deriving from theoretical calculations and analytical formulae representing empirical fits to tabulations. Although most of these sources of cross sections are based on one theoretical reference, the statistical data analysis documented in the paper highlights differences in their compatibility with experiment. The cross sections collected in the 1997 version of the Evaluated Photon Data Library (EPDL) exhibit the lowest incompatibility with experiment; the paper details the validation results for all the examined cross section sources. The scarcity of experimental data does not allow the validation process to discern pair production in the field of the nucleus and in the field of atomic electrons; nevertheless, the paper documents relevant clues regarding the contribution of the latter to reproduce experimental measurements.
Copyright/License	publication: (License: CC-BY-4.0) preprint: (License: arXiv nonexclusive-distrib 1.0)

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