Published May 22, 1986
| Version v1
Journal article
Formation of the chi1 and chi2 charmonium resonances in antiproton-proton annihilation and measurements of their masses and total widths
Creators
- Baglin, C.1
- Bassompierre, G.1
- Brient, J.C.1
- Broll, C.1
- Bussiere, A.1
- Guillaud, J.P.1
- Moerch, C.1
- Poulet, M.1
- Baird, S.2
- Khan-Aronsen, E.2
- Leistam, L.2
- Lundby, A.2
- Mouellic, B.2
- Poole, J.2
- Borreani, G.3
- Cester, R.3
- Marchetto, F.3
- Menichetti, E.3
- Pastrone, N.3
- Rinaudo, G.3
- Brom, J.M.4
- Escoubes, B.4
- Bugge, L.5
- Buran, T.5
- Kirsebom, K.5
- Kylling, A.5
- Olsen, D.5
- Skjevling, G.5
- Stugu, B.5
- Burq, J.P.6
- Chemarin, M.6
- Chevallier, M.6
- Fay, J.6
- Ille, B.6
- Lambert, M.6
- Buzzo, A.7, 8
- Ferroni, S.7, 8
- Gracco, V.7, 8
- Macri, M.7, 8
- Pia, M.G.7, 8
- Santroni, A.7, 8
- Petrillo, L.9
- Severi, M.9
- R704 Collaboration
- 1. Grenoble-1 Univ., 74 - Annecy (France). Lab. de Physique des Particules
- 2. European Organization for Nuclear Research, Geneva (Switzerland)
- 3. Turin Univ. (Italy)
- 4. Strasbourg-1 Univ., 67 (France). Centre de Recherches Nucleaires
- 5. Oslo Univ. (Norway)
- 6. Lyon-1 Univ., 69 - Villeurbanne (France). Inst. de Physique Nucleaire
- 7. Istituto Nazionale di Fisica Nucleare, Genoa (Italy)
- 8. Genoa Univ. (Italy)
- 9. Rome Univ. (Italy)
Description
In an experiment performed at the CERN-ISR the direct formation is observed of the chi1 and chi2 charmonium states in proton-antiproton annihilation. A novel technique provided excellent energy resolution together with small background and reduced systematics. The following values for the masses and total widths of the states were obtained: GAMMAsub(chi1) < 1.3 MeV (95% CL); msub(chi1) = (3511.3+-0.4+-0.4) MeV; GAMMAsub(chi2) = (2.6+1.4-1.0) MeV; msub(chi2) = (3556.9+-0.4+-0.5) MeV. First measurements of the partial widths to antiproton-proton are also reported: GAMMA(chi1 -> anti pp) = 57+-12+-11) eV and GAMMA(chi2 -> anti pp) = (233+-48+-48) eV. (orig./HSI)
Additional details
Publishing Information
- Journal Title
- Phys. Lett., B
- Journal Volume
- 172
- Journal Issue
- 3/4
- Series
- Phys. Lett., B.
- Journal Page Range
- 455-460
- ISSN
- 0370-2693
- CODEN
- PYLBA
INIS
- Country of Publication
- Netherlands
- Country of Input or Organization
- Netherlands
- INIS RN
- 17057480
- Subject category
- S72: PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; S72: PHYSICS OF ELEMENTARY PARTICLES AND FIELDS;
- Resource subtype / Literary indicator
- Numerical Data
- Descriptors DEI
- ANNIHILATION; BRANCHING RATIO; CHARMONIUM; CHI RESONANCES; CHI-3500 RESONANCES; CHI-3550 RESONANCES; EFFECTIVE MASS; ELECTRONS; ENERGY DEPENDENCE; EXCITATION FUNCTIONS; EXPERIMENTAL DATA; GEV RANGE 01-10; HADRONIC PARTICLE DECAY; INTEGRAL CROSS SECTIONS; LEPTONIC DECAY; MASS SPECTRA; PAIR PRODUCTION; PARTICLE WIDTHS; PHOTONS; POSITRONS; PROTON-ANTIPROTON INTERACTIONS; PSI-3105 RESONANCES; RADIATIVE DECAY; REST MASS
- Descriptors DEC
- ANTILEPTONS; ANTIMATTER; ANTIPARTICLES; BARYON-BARYON INTERACTIONS; BASIC INTERACTIONS; BOSONS; CROSS SECTIONS; DATA; DECAY; ELEMENTARY PARTICLES; ENERGY RANGE; FERMIONS; GEV RANGE; HADRON-HADRON INTERACTIONS; HADRONS; INFORMATION; INTERACTIONS; LEPTONS; MASS; MASSLESS PARTICLES; MATTER; MESON RESONANCES; MESONS; NUCLEON-ANTINUCLEON INTERACTIO; NUMERICAL DATA; PARTICLE DECAY; PARTICLE INTERACTIONS; PARTICLE PRODUCTION; PARTICLE PROPERTIES; PSI RESONANCES; QUARKONIUM; RESONANCE PARTICLES; SPECTRA; WEAK INTERACTIONS; WEAK PARTICLE DECAY
Optional Information
- Collaborations
- R704 Collaboration.