Hint for a minimal interaction length in e⁺e^-→γγ annihilation in total cross section of centre-of-mass energies 55-207 GeV

2021/12/09 by Yutao Chen, M. Liu, Chen, Yutao +3
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Experiment (hep-ex) #High Energy Physics - Phenomenology (hep-ph) #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions

paper · pdf · doi:10.48550/arxiv.2112.04767

openalex publication_date 2021/12/09 · openalex created_date 2022/05/05 · openalex updated_date 2026/07/28

Abstract

The measurements of the total cross section of the e⁺e^-→γγ reaction from the VENUS, TOPAS, OPAL, DELPHI, ALEPH and L3 collaborations, collected between 1989 to 2003, are used to perform a χ² test to search for a finite interaction length in direct contact term. The experimental data of the total cross section compared to the QED cross section of a χ² test allows, to set limit on a finite interaction length r_e=(1.25± 0.16) × 10 ^-17 [cm] . In the direct contact term annihilation is this interaction lengths a measure for the size of the electron.

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