Search for Structure in σ(e+e--->hadrons) between s=10.34 and 11.6 GeV
Abstract
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.
- Publication:
-
Physical Review Letters
- Pub Date:
- April 1982
- DOI:
- 10.1103/PhysRevLett.48.906
- Bibcode:
- 1982PhRvL..48..906R
- Keywords:
-
- 13.65.+i;
- 14.40.Gx;
- Mesons with S=C=B=0 mass>2.5 GeV