SEARCH FOR STRUCTURE IN SIGMA (E+ E- ---> HADRONS) BETWEEN S**(1/2) = 10.34-GEV AND 11.6-GEV

1982
5 pages
Published in:
  • Phys.Rev.Lett. 48 (1982) 906-910
Experiments:

Citations per year

1982199320042015202402468
Abstract: (APS)
The CUSB detector at the Cornell Electron Storage Ring has been used to measure R=σ(e+e−→hadrons)σ(e+e−→μ+μ−) in the c.m. energy regions between the ϒ′′ and the ϒ′′′, and above the ϒ′′′ up to s=11.6 GeV, with integrated luminosities of 5000 and 2100 nb−1, respectively. No narrow resonances are observed, and limits on the leptonic widths are presented. The average value of R increases by 0.31±0.06 across the flavor threshold.
  • ELECTRON POSITRON: COLLIDING BEAMS
  • COLLIDING BEAMS: ELECTRON POSITRON
  • ELECTRON POSITRON: ANNIHILATION
  • ANNIHILATION: ELECTRON POSITRON
  • HADRON: ELECTROPRODUCTION
  • ELECTROPRODUCTION: HADRON
  • HADRON: MULTIPLE PRODUCTION
  • MULTIPLE PRODUCTION: HADRON
  • TOTAL CROSS SECTION: RATIO
  • RATIO: TOTAL CROSS SECTION