Study of UPSILON' radiative decays with the Crystal Ball at Doris
Description
The Crystal Ball has been taking data on the UPSILON and UPSILON' at the DORIS II storage ring since Autumn 1982. Preliminary results are presented from studies of the inclusive photon spectra of the UPSILON and UPSILON' and the exclusive channel UPSILON' → γγUPSILON → γγ1+1-. We measure two signals in the UPSILON' → γ + anything inclusive channel at E(γ)=(108.3+-0.9+-3.0) MeV and E(γ)=(127.5+-1.2+-4.0) MeV. Branching ratios obtained for these signals are BR[UPSILON' → γ(108) + anything] = (6.3+-1.3+-1.4)%, BR[UPSILON' → γ(128) + anything] = (6.0+-1.3+-1.4)%. From the value of the UPSILON' mass m(UPSILON')=(10023.1+-0.4+-0.5) MeV obtained using the depolarization method, the masses of the two observed 3Psub(J) states are determined to be m1=(9914+-5) MeV and m2=(9895+-5) MeV
Additional details
Publishing Information
- Publisher
- Editions Frontieres.
- Imprint Place
- Gif-sur-Yvette (France)
- ISBN
- 2-86332-025-4
- Imprint Title
- Proceedings of physics in collision 3., and of the Workshop on search for heavy flavours
- Imprint Pagination
- 506 p.
- Journal Page Range
- p. 379-387.
Conference
- Title
- Workshop on search for heavy flavours.
- Dates
- 29-30 Aug 1983.
- Place
- Como (Italy).
INIS
- Country of Publication
- France
- Country of Input or Organization
- France
- INIS RN
- 16052370
- Subject category
- S72: PHYSICS OF ELEMENTARY PARTICLES AND FIELDS;
- Resource subtype / Literary indicator
- Conference
- Descriptors DEI
- BRANCHING RATIO; MASS; PHOTONS; RADIATIVE DECAY; SPECTRA; UPSILON RESONANCES
- Descriptors DEC
- BOSONS; DECAY; ELEMENTARY PARTICLES; HADRONS; MASSLESS PARTICLES; MESON RESONANCES; MESONS; PARTICLE DECAY; RESONANCE PARTICLES; VECTOR MESONS