PI- P --> P PI- F2(1270)
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A Critical Discussion of a PRISM Plot Analysis of the Four-Body Reaction pi- p --> pi- p pi+ pi- at 3.93-GeV/c

Ferrando, A. ; Chaloupka, V. ; Losty, M. ; et al.
Nucl.Phys.B 135 (1978) 237-257, 1978.
Inspire Record 122493 DOI 10.17182/hepdata.35102

A multidimensional analysis of the reaction π − p → π − p π + π − at 3.93 GeV/ c is presented. Its results are compared to those obtained with conventional methods and its limitations are discussed.

1 data table
Table 1

No description provided.


Cross sections for resonance production in the reaction pi+- p ---> p pi+- pi+ pi- at 16-GeV/c, as obtained by a maximum likelihood fit

The Aachen-Berlin-Bonn-CERN-Heidelberg collaboration Honecker, R. ; Rumpf, K. ; Tsanos, N. ; et al.
Nucl.Phys.B 50 (1972) 157-165, 1972.
Inspire Record 84326 DOI 10.17182/hepdata.32751

Cross sections for resonance production in the reactions π ± p → p π ± π + π − at 16 GeV/ c are determined by a maximum likelihood fit, making use of the measurements of all individual events. The reactions are described by a simple parametrization based on an incoherent superposition of amplitudes for quasi two-body and quasi three-body processes and a non-resonant backgroud. In this way the reflections are accounted for in a consistent way. Thus cross sections are obtained for Δ ++ , Δ 0 , ρ 0 and f 0 production which do not suffer from the uncertainties of background subtraction typical of the usual technique of fitting individual mass distributions.

2 data tables
Table 1

TWO PARTICLE RESONANCE CROSS SECTIONS.

Table 2

CHANNEL FRACTIONS FROM THE FITS. THE AUTHORS WARN AGAINST DERIVING CROSS SECTIONS FOR THREE-PARTICLE RESONANCES.