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

  • 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;
  • Ong, RA;
  • Perl, ML;
  • Richter, B;
  • Riles, K;
  • Rowson, PC;
  • Schaad, T;
  • Schellman, H;
  • Schmidke, WB;
  • Sheldon, PD;
  • Trilling, GH;
  • Wood, DR;
  • Yelton, JM
  • 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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