Butler, W.R.
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A Measurement of Elastic $J / \psi$ Photoproduction Cross Section at Fermilab E687

The E687 collaboration Frabetti, P.L. ; Paolone, V.S. ; Yager, P.M. ; et al.
Phys.Lett.B 316 (1993) 197-206, 1993.
Inspire Record 359356 DOI 10.17182/hepdata.28834

Measurements of elastic photoproduction cross sections for the J / ψ meson from 100 GeV to 375 GeV are presented. The results indicate that the cross section increases slowly in this range. The shape of the energy dependence agrees well with the photon-gluon fusion model prediction.

3 data tables
Table 1

Data supplied by V. Paolone.

Table 2

Cross section data using Bethe-Heitler event normalization.

Table 3

Cross section data using the Beam Gamma Monitor normalization.


Cross-Section Measurement for Nonstrange Final States and Single Pion Production in pi+ p Interactions at 3.6-GeV/c

Macnaughton, J. ; Butler, W.R. ; Coyne, D.G. ; et al.
Phys.Rev.D 15 (1977) 1832-1845, 1977.
Inspire Record 124169 DOI 10.17182/hepdata.24652

Cross sections are presented for all final states without strange-particle production. Contributions to single-pion production are found from (i) Δ(1238)π, (ii) ρ+p, (iii) nucleon diffractive dissociation into Nπ, (iv) N*(1688)π+, and (v) "phase space." Processes (i), (ii), and (iii) are studied in some detail taking into account overlaps between the various subchannels.

10 data tables
Table 1

No description provided.

Table 2

'JM'.

Table 3

'JM'. USING DATA WITH 1.12 < M(P PI+) < 1.32 GEV AND COS(P PI DECAY ANGLE IN JACKSON FRAME) < 0.

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