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

  • Author(s): Karlen, D
  • Abrams, G
  • Amidei, D
  • Baden, AR
  • Barklow, T
  • Boyarski, AM
  • Boyer, J
  • Burchat, PR
  • Burke, DL
  • Butler, F
  • Dorfan, JM
  • Feldman, GJ
  • Gidal, G
  • Gladney, L
  • Gold, MS
  • Goldhaber, G
  • Golding, L
  • Haggerty, J
  • Hanson, G
  • Hayes, K
  • Herrup, D
  • Hollebeek, RJ
  • Innes, WR
  • Jaros, JA
  • Juricic, I
  • Kadyk, JA
  • Klein, SR
  • Lankford, AJ
  • Larsen, RR
  • Leclaire, BW
  • Levi, M
  • Lockyer, NS
  • Lüth, V
  • Nelson, ME
  • et al.
Abstract

The process e+e-e+e-(), 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 4. The ratio of measured to calculated cross sections is R=0.9930.0170.015, 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. © 1989 The American Physical Society.

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