A study of double tagged two-photon reactions at spear
Abstract
We have identified 262 doubly tagged two-photon events. A subset of the data shows an enhancement of 21 events in the inclusive two-photon mass squared distribution between 0.8 and 2.2 GeV 2. If these events result from spin 2 resonance production then Γγγ = 9.5 ± 3.9 ± 2.4 keV (statistical and systematic). From another subset of 58 events in which the final state could be classified we determine the two-photon hadron to muon cross section ratio Rγγ = 1.1 ± 0.3 ± 0.3.
- Publication:
-
Physics Letters B
- Pub Date:
- December 1980
- DOI:
- 10.1016/0370-2693(80)90610-3
- Bibcode:
- 1980PhLB...97..320B