ISSN:
1434-6052
Source:
Springer Online Journal Archives 1860-2000
Topics:
Physics
Notes:
Abstract We have measured charged particle pair production in two-photon scattering at thee + e − storage ring PETRA. While the main source of such events is the production of lepton pairs, the presence of an additional process is clearly indicated by the measured invariant mass distribution of the two particles and their angular distributions. We determine that the excess is mainly due to the decayf 0(1270)→π+π-. We derive a width Γ(f 0→γγ)=3.2±0.2±0.6 keV (statistical and systematic).
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01547482