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Measurement of single and double radiative low-Q2 Bhabha scattering at Ec.m.=29 GeV

et al.

Published Web Location

https://doi.org/10.1103/physrevd.39.1861
Creative Commons 'BY' version 4.0 license
Abstract

The process e+e-→e+e-γ(γ), where one electron scatters at a small angle, is studied with data from the Mark II detector at the SLAC storage ring PEP. The data are in excellent agreement with a Monte Carlo calculation and include a large contribution from order α4. The ratio of measured to calculated cross sections is R=0.993±0.017±0.015, where the first error is statistical and the second systematic. This is a sensitive test of the calculation of the dominant background for neutrino-counting experiments.

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