Published May 1988
| Version v1
Journal article
Measurement and analysis of the reaction γγ → π+π-π+π-
Creators
- Berger, C.1
- Genzel, H.1
- Lackas, W.1
- Pielorz, J.1
- Raupach, F.1
- Wagner, W.1
- Klovning, A.2
- Lillestoel, E.2
- Buerger, J.3
- Criegee, L.3
- Deuter, A.3
- Franke, G.3
- Gerke, C.3
- Knies, G.3
- Lewendel, B.3
- Meyer, J.3
- Michelsen, U.3
- Pape, K.H.3
- Timm, U.3
- Winter, G.G.3
- Zimmermann, W.3
- Ferrarotto, F.4, 3
- Gaspero, M.4, 3
- Stella, B.4, 3
- Zachara, M.5, 3
- Bussey, P.J.6
- Cartwright, S.L.6
- Dainton, J.B.6
- Hendry, D.6
- King, B.T.6
- Raine, C.T.6
- Scarr, J.M.6
- Skillicorn, I.O.6
- Smith, K.M.6
- Thomson, J.C.6
- Achterberg, O.7
- Blobel, V.7
- Burkart, D.7
- Diehlmann, K.7
- Feindt, M.7
- Kapitza, H.7
- Koppitz, B.7
- Krueger, M.7
- Poppe, M.7
- Spitzer, H.7
- Staa, R. van7
- Chang, C.Y.8
- Glasser, R.G.8
- Kellogg, R.G.8
- Maxfield, S.J.8
- Polvado, R.O.8
- Sechi-Zorn, B.8
- Skard, J.A.8
- Skuja, A.8
- Tylka, A.J.8
- Welch, G.E.8
- Zorn, G.T.8
- Almeida, F.9
- Baecker, A.9
- Barreiro, F.9
- Brandt, S.9
- Derikum, K.9
- Grupen, C.9
- Meyer, H.J.9
- Mueller, H.9
- Neumann, B.9
- Rost, M.9
- Stupperich, K.9
- Zech, G.9
- Alexander, G.10
- Bella, G.10
- Gnat, Y.10
- Grunhaus, J.10
- Junge, H.11
- Kraski, K.11
- Maxeiner, C.11
- Maxeiner, H.11
- Meyer, H.11
- Schmidt, D.11
- PLUTO Collaboration
- 1. Technische Hochschule Aachen (Germany, F.R.). Lehrstuhl fuer Experimentalphysik 1A und 1. Physikalisches Inst.
- 2. Bergen Univ. (Norway)
- 3. Deutsches Elektronen-Synchrotron (DESY), Hamburg (Germany, F.R.)
- 4. Rome Univ. (Italy)
- 5. Institute of Nuclear Physics, Krakow (Poland)
- 6. Glasgow Univ. (UK)
- 7. Hamburg Univ. (Germany, F.R.). 2. Inst. fuer Experimentalphysik
- 8. Maryland Univ., College Park (USA)
- 9. Siegen Univ. (Gesamthochschule) (Germany, F.R.)
- 10. Tel Aviv Univ. (Israel)
- 11. Wuppertal Univ. (Gesamthochschule) (Germany, F.R.)
Description
We have measured the cross section of four charged pion production in photon-photon interactions in the invariant mass range 1.0 ≤ Wyy ≤ 3.2 GeV and up to Q2 = 16 GeV2. For 1.2 GeV ≤ Wyy ≤ 1.7 GeV the process is dominated by ρ0ρ0 production with a rapid rise in cross section around 1.2 GeV, well below the nominal ρ0ρ0 threshold. The observed distributions in the two particle masses and in the production and decay angles are well described by an incoherent sum of the phase-space subprocesses γγ → ρ0ρ0, → ρ0π+π-, and → π+π-π+π-. A spin-parity analysis of the ρ0ρ0 system shows Jp = 2+ to dominate, although 0+ is also possible for Wyy ≤ 1.4 GeV. Negative parity states are exluded. (orig.)
Additional details
Publishing Information
- Journal Title
- Z. Phys., C
- Journal Volume
- 38
- Journal Issue
- 4
- Series
- Z. Phys., C.
- Journal Page Range
- 521-533
- ISSN
- 0170-9739
- CODEN
- ZPCFD
INIS
- Country of Publication
- Germany
- Country of Input or Organization
- Germany
- INIS RN
- 19053952
- Subject category
- S72: PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; S72: PHYSICS OF ELEMENTARY PARTICLES AND FIELDS;
- Resource subtype / Literary indicator
- Numerical Data
- Descriptors DEI
- ANGULAR CORRELATION; ANGULAR DISTRIBUTION; BRANCHING RATIO; EFFECTIVE MASS; ENERGY DEPENDENCE; EXCITATION FUNCTIONS; EXPERIMENTAL DATA; GEV RANGE 01-10; HADRONIC PARTICLE DECAY; INTEGRAL CROSS SECTIONS; MASS SPECTRA; PAIR PRODUCTION; PARITY; PARTIAL WAVES; PHOTON-PHOTON INTERACTIONS; PHOTOPRODUCTION; PIONS MINUS; PIONS PLUS; REST MASS; RHO-770 MESONS; SCALAR MESONS; SCATTERPLOTS; SPIN; TENSOR MESONS
- Descriptors DEC
- ANGULAR MOMENTUM; BASIC INTERACTIONS; BOSONS; CORRELATIONS; CROSS SECTIONS; DATA; DECAY; DIAGRAMS; DISTRIBUTION; ELECTROMAGNETIC INTERACTIONS; ELEMENTARY PARTICLES; ENERGY RANGE; GEV RANGE; HADRONS; INFORMATION; INTERACTIONS; MASS; MESONS; NUMERICAL DATA; PARTICLE DECAY; PARTICLE INTERACTIONS; PARTICLE PRODUCTION; PARTICLE PROPERTIES; PIONS; PSEUDOSCALAR MESONS; SPECTRA; VECTOR MESONS
Optional Information
- Collaborations
- PLUTO Collaboration.