Published June 1, 1990 | Version v1
Journal article

Charge-exchange photoproduction of the a2-(1320) in association with Δ++ at 19.3 GeV/c

Creators

  • 1. University of Tel Aviv, Tel Aviv (Israel)
  • 2. University of California, Berkeley, CA (USA)
  • 3. Tufts University, Medford, MA (USA)
  • 4. Tohoku University Sendai 980 (Japan)
  • 5. Technion-Israel Institute of Technology, Haifa 32000 (Israel)
  • 6. Stanford Linear Accelerator Center, Stanford University, Stanford, CA (USA)
  • 7. Rutherford Appleton Laboratory, Didcot, Oxon, OX11 0QX (England)
  • 8. Oak Ridge National Laboratory, Oak Ridge, TN (USA)
  • 9. Nara Women's University, Kita-uoya, Nishi-Machi Nara 630 (Japan)
  • 10. Massachusetts Institute of Technology, Cambridge, MA (USA)
  • 11. KEK National Laboratory for High Energy Physics, Oho 1-1, Tsukuba-shi, Ibaraki-ken 305 (Japan)
  • 12. Imperial College, London SW7 2BZ (England)
  • 13. Florida State University, Tallahassee, FL (USA)
  • 14. Duke University, Durham, NC (USA)
  • 15. Brown University, Providence, RI (USA)
  • 16. Birmingham University, Birmingham B15 2TT (England)

Description

We examine the negative 3π final state produced in association with Δ++(1232) in the reaction γp→Δ++π+π-π- at an incident photon energy of 19.3 GeV. The most prominent enhancement in the 3π spectrum occurs at a mass and with a width consistent with the parameters of the a2(1320). This identification is confirmed by the various angular distributions. The a2 production cross section, corrected for efficiencies and alternate a2 decay modes, is 0.45±0.05 μb

Additional details

Publishing Information

Journal Title
Physical Review, D
Journal Volume
41
Journal Issue
11
Series
Phys. Rev., D.
Journal Page Range
3317-3323
ISSN
0556-2821
CODEN
PRVDA