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Two-photon production of pion pairs.

  • Author(s): Boyer, J
  • Butler, F
  • Gidal, G
  • Abrams, G
  • Amidei, D
  • Baden, AR
  • Gold, MS
  • Golding, L
  • Goldhaber, G
  • Haggerty, J
  • Herrup, D
  • Juricic, I
  • Kadyk, JA
  • Levi, ME
  • Nelson, ME
  • Rowson, PC
  • Schellman, H
  • Schmidke, WB
  • Sheldon, PD
  • Trilling, GH
  • Wood, DR
  • Barklow, T
  • Boyarski, A
  • Burchat, P
  • Burke, DL
  • Cords, D
  • Dorfan, JM
  • Feldman, GJ
  • Gladney, L
  • Hanson, G
  • Hayes, K
  • Hollebeek, RJ
  • Innes, WR
  • Jaros, JA
  • Karlen, D
  • Lankford, AJ
  • Larsen, RR
  • LeClaire, BW
  • Lockyer, NS
  • Lüth, V
  • Ong, RA
  • Perl, ML
  • Richter, B
  • Riles, K
  • Yelton, JM
  • Schaad, T
  • et al.
Abstract

We present a new high-statistics measurement of the cross section for the process e+e-e+e-+- at a center-of-mass energy of 29 GeV for invariant pion-pair masses M(+-) between 350 MeV/c2 and 1.6 GeV/c2. We observe the f2(1270) and measure its radiative width to be 3.15±0.04±0.39 keV. We also observe an enhancement in the +- spectrum near 1 GeV. General agreement is found with unitarized models of the +- reaction that include final-state interactions. © 1990 The American Physical Society.

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