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ISSN - 00213640, EISSN - 10906487, JETP Letters, 1997, vol. 65, p. 313-319

Electroproduction of an isobar as a background from the beam-residual-gas interaction in factories

Achasov M. N., Golubev V. B., Serednyakov S. I., Achasov N. N.

It is shown that the electroproduction of the isobar Δ(1232) occurs in factories when the beams interact with the residual gas. In one effective year (107 s) the decay of this isobar over an interaction length of one meter gives ∼107 pions, moving predominantly in a direction transverse to the axis of the beams, with a resonance energy distribution having a 120-MeV wide peak near 265 MeV. Formulas required for modeling the process under discussion, giving the distributions over the momentum transfer, angles, energies, and momenta of the decay products are presented. © 1997 American Institute of Physics.