PI- P --> P A1(1270)-
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Diffraction Dissociation of Photons on Hydrogen

Chapin, T.J. ; Cool, R.L. ; Goulianos, Konstantin A. ; et al.
Phys.Rev.D 31 (1985) 17-30, 1985.
Inspire Record 216071 DOI 10.17182/hepdata.4332

We report results from a measurement of the inclusive diffraction dissociation of photons on hydrogen, γp→Xp, in the range 75<pγ<148 GeV/c, 0.02<‖t‖<0.1 (GeV/c)2, and MX2/s<0.1. Our data show an exponential t dependence and a dominant 1/MX2 behavior for MX2>4 GeV2. We test the finite-mass sum rule and, by comparing γp with π−p data obtained in the same apparatus, we test factorization.

18 data tables
Table 1

EXTRACTED ELASTIC CROSS SECTIONS.

Table 2

EXTRACTED ELASTIC CROSS SECTIONS.

Table 3

RESULTS OF EXPONENTIAL FITS TO ELASTIC CROSS SECTIONS.

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REACTION PI- P ---> PI- PI+ PI- P AT 8-GEV/C

Kitagaki, T. ; Tanaka, S. ; Yuta, H. ; et al.
Phys.Rev.D 26 (1982) 1554-1571, 1982.
Inspire Record 182973 DOI 10.17182/hepdata.23971

Results from a high-statistics experiment involving an exposure of the SLAC 82-in. hydrogen bubble chamber to a beam of 8-GeV/c π− yielding a final state of π−π+π−p are presented. Copious production of ρ, Δ++, and f is found. Considerable quasi-two-body production in which one particle decays to one of the above resonances is also observed. Some double-resonance production involving baryon and meson resonances is also seen. The production properties of ρ, Δ++, and f mesons are well described by a double-Regge model.

29 data tables
Table 1

TOPOLOGICAL CROSS SECTIONS. FIRST 2 PRONG VALUE CONTAINS ELASTIC. 0PRONG IS TAKEN FROM A SMALLER AND DIFFERENT PARTIAL SAMPLE.

Table 2

CROSS SECTION CALCULATED VIA THE OPTICAL THEOREM AS A CROSS CHECK.

Table 3

SPECIFIC CHANNEL CROSS SECTIONS.

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