Published April 1989 | Version v1
Journal article Metadata-only

Two-photon production of final states with a panti p pair

Creators

  • 1. Deutsches Elektronen-Synchrotron (DESY), Hamburg (Germany, F.R.)
  • 2. Dortmund Univ. (Germany, F.R.). Inst. fuer Physik
  • 3. Erlangen-Nuernberg Univ., Erlangen (Germany, F.R.). Physikalisches Inst.
  • 4. Heidelberg Univ. (Germany, F.R.). Inst. fuer Hochenergiephysik
  • 5. Toronto Univ., Ontario (Canada)
  • 6. Carleton Univ., Ottawa, Ontario (Canada)
  • 7. York Univ., Downsview, Ontario (Canada)
  • 8. McGill Univ., Montreal, Quebec (Canada)
  • 9. Kansas Univ., Lawrence (USA)
  • 10. Karlsruhe Univ. (T.H.) (Germany, F.R.). Inst. fuer Experimentelle Kernphysik
  • 11. Ljubljana Univ. (Yugoslavia). Dept. of Physics
  • 12. Institut Jozef Stefan, Ljubljana (Yugoslavia)
  • 13. Lund Univ. (Sweden). Dept. of Physics
  • 14. AN SSSR, Moscow. Inst. Teoreticheskoj i Ehksperimental'noj Fiziki
  • 15. South Carolina Univ., Columbia (USA)

Description

Two-photon production of the exclusive final states panti p+nπ (n = 0, 1, 2, and 3) has been investigated using the ARGUS detector at the e+e- storage ring DORIS II at DESY. The reactions γγ → panti pπ0 and γγ → πanti pπ+π-π0 have been observed for the first time, as have the Δ++ and anti Δ++ baryons in the final state panti pπ+π-. No evidence was found for Δ++ anti Δ++ production. Topological cross sections for two-photon production of panti p, panti pπ0, panti pπ+π- and panti pπ+π-π0, as well as the cross section for γγ → Δ++anti pπ-+c.c., have been measured. Upper limits are given for the cross sections for γγ → Δ0anti Δ0, γγ → Δ++anti Δ++ and γγ → Λanti Λ. (orig.)

Additional details

Publishing Information

Journal Title
Zeitschrift fuer Physik, C
Journal Volume
42
Journal Issue
4
Series
Z. Phys., C.
Journal Page Range
543-548
ISSN
0170-9739
CODEN
ZPCFD

INIS

Country of Publication
Germany
Country of Input or Organization
Germany
INIS RN
20039809
Subject category
S72: PHYSICS OF ELEMENTARY PARTICLES AND FIELDS;
Resource subtype / Literary indicator
Numerical Data
Descriptors DEI
ANGULAR DISTRIBUTION; ANTILAMBDA PARTICLES; ANTIPROTONS; DELTA-1232 BARYONS; DIFFERENTIAL CROSS SECTIONS; EFFECTIVE MASS; ENERGY DEPENDENCE; EXCITATION FUNCTIONS; EXCLUSIVE INTERACTIONS; EXPERIMENTAL DATA; GEV RANGE 01-10; INTEGRAL CROSS SECTIONS; LAMBDA PARTICLES; LIMITING VALUES; MASS SPECTRA; PAIR PRODUCTION; PHOTON-PHOTON INTERACTIONS; PHOTONS; PHOTOPRODUCTION; PIONS MINUS; PIONS NEUTRAL; PIONS PLUS; PROTONS
Descriptors DEC
ANTIBARYONS; ANTIHYPERONS; ANTIMATTER; ANTINUCLEI; ANTINUCLEONS; ANTIPARTICLES; BARYONS; BASIC INTERACTIONS; BOSONS; CATIONS; CHARGED PARTICLES; CROSS SECTIONS; DATA; DELTA BARYONS; DISTRIBUTION; ELECTROMAGNETIC INTERACTIONS; ELEMENTARY PARTICLES; ENERGY RANGE; FERMIONS; GEV RANGE; HADRONS; HYDROGEN IONS; HYDROGEN IONS 1 PLUS; HYPERONS; INFORMATION; INTERACTIONS; IONS; LAMBDA BARYONS; MASS; MASSLESS PARTICLES; MATTER; MESONS; N*BARYONS; NUCLEI; NUCLEONS; NUMERICAL DATA; PARTICLE INTERACTIONS; PARTICLE PRODUCTION; PIONS; PSEUDOSCALAR MESONS; SPECTRA; STRANGE PARTICLES

Optional Information

Contract/Grant/Project number
Contract BMFT 054DO51P; BMFT 054ER11P(5); BMFT 054HD24P; BMFT 054KA17P; DE-AS09-80ER10690
Collaborations
ARGUS Collaboration.