Meson Resonance Production in pi+ p Interactions at 15-GeV/c

Baltay, C. ; Cautis, C.V. ; Cohen, Daniel H. ; et al.
Phys.Rev.D 17 (1978) 62, 1978.
Inspire Record 5627 DOI 10.17182/hepdata.24406

We report on a study of 15-GeV/c π+p interactions of all topologies using the SLAC 82-in. hydrogen bubble chamber. A description is given of the automatic pattern-recognition techniques used to measure the events. Cross sections are given for meson-resonance production in all topologies. Evidence is presented for a new resonance decaying to five pions. A measurement is made of the branching ratios of the g meson. A study is made of low-mass enhancements in the diffractively produced ρπ, fπ, and gπ channels, and a search is made for nondiffractive production of the A1 meson.

4 data tables

TOPOLOGICAL CROSS SECTIONS.

FITTED EVENTS CROSS SECTIONS.

RESONANCE PRODUCTION CROSS SECTIONS.

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Cross-Sections and Charged Particle Multiplicities in pi+ p and p p Collisions at 60-GeV/c

Bromberg, C. ; Ferbel, T. ; Jensen, T. ; et al.
Phys.Rev.D 15 (1977) 64, 1977.
Inspire Record 108488 DOI 10.17182/hepdata.24538

We have measured charged-particle multiplicities and elastic and inelastic cross sections for π+p and pp interactions at 60 GeV/c. The data are from a 30 000-picture exposure of the 30-inch bubble chamber to a tagged but unseparated positive-particle beam at Fermilab. The low-order moments of the inelastic multiplicity distributions for all charged particles are 〈n〉 = 5.60±0.09, f2 = 0.96±0.31, and 〈n〉D = 2.19±0.06 for pp reactions and 〈n〉6.23±0.10, f2 = 1.63±0.37, and 〈n〉D = 2.22±0.06 for π+p collisions.

3 data tables

NORMALIZED TO A TOTAL CROSS SECTION OF 38.3 MB. CORRECTED FOR SMALL -T LOSSES AND FOR PI0 MESONS.

NORMALIZED TO A TOTAL CROSS SECTION OF 23.2 MB. CORRECTED FOR SMALL -T LOSSES AND FOR PI0 MESONS.

FORWARD CROSS SECTIONS ARE CONSISTENT WITH OPTICAL POINT FOR PURELY IMAGINARY ELASTIC AMPLITUDES.