Taiuti, M.
nucl-ex
Electron production
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K- p Charge Exchange and Hyperon Production Cross-Sections from 860-MeV/c to 1000-MeV/c

Jones, M. ; Levi Setti, R. ; Merrill, D. ; et al.
Nucl.Phys.B 90 (1975) 349-383, 1975.
Inspire Record 91346 DOI 10.17182/hepdata.6742

The K − p reactions leading to charge exchange and hyperon final states have been studied at nine momenta between 862 and 1001 MeV/ c using data from a 600 000 picture exposure of the Lawrence Berkeley Laboratory 25″ liquid hydrogen bubble chamber. Partial cross sections are determined for all final states resolved by kinematic fitting. In addition, differential cross sections are presented for the two-body final states K o n , Λπ o and Σ +- π -+ along with hyperon polarization angular distributions for Λπ o and Σ + π − .

61 data tables
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Further evidence for the decay mode x(0) ---> gamma gamma and determination of the branching ratio x(0) ---> gamma gamma/ x(0) ---> total

Basile, M. ; Bollini, D. ; Dalpiaz, P. ; et al.
Nucl.Phys.B 33 (1971) 29-41, 1971.
Inspire Record 68511 DOI 10.17182/hepdata.33085

41 ± 8 events of the type X 0 → γγ have been observed in a study of the reaction π − p → n(X 0 → γγ ) at 1.6 GeV/ c incident π -momentum. This provides further evidence to our previous observation of this new X 0 decay mode and allows the determination of the branching ratio Γ(X 0 →γγ) Γ(X 0 → total =(1.7 ± 0.4)%. The theoretical implications of this result are discussed.

1 data table
Table 1

THIS MEASUREMENT WHEN COMBINED WITH THE ETAPRIME PRODUCTION CROSS SECTION OF M. BASILE ET AL., NC 3A, 371 (1971) YIELDS A BR(ETAPRIME --> 2GAMMA) OF 1.7 +- 0.4 PCT.