Abstract
Interactions of 209-GeV muons within a magnetized-steel calorimeter have produced 1000±80 μ+μ- pairs from Jψ(3100) decay. Redundant systems of proportional and drift chambers maintained uniform acceptance and 9% mass resolution. Above 30 GeV, the cross section for ψ production by virtual photons is found to rise less steeply with energy than predicted by a quantum chromodynamics calculation. Its dependence on Q2 fits the vector-dominance form (1+Q2M2)-2 with M=2.7±0.5 GeV.
Original language | English (US) |
---|---|
Pages (from-to) | 187-190 |
Number of pages | 4 |
Journal | Physical review letters |
Volume | 43 |
Issue number | 3 |
DOIs | |
State | Published - 1979 |
Externally published | Yes |
ASJC Scopus subject areas
- General Physics and Astronomy