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Virtual photoproduction of J/ ψ mesons has been measured for 280 GeV muon iron interactions in an iron/scintillator calorimeter target. The J/ψ's were identified by their decay into muon pairs. 315 events were observed, about half of which were elastic. The t , Q 2 and v distributions of these elastic events are presented. The v dependence is measured between 40 and 180 Mev and compared with lower energy photoproduction results. The Q 2 dependence is compared with the predictions of the vector dominance model.

4 data tables

Table 1

TPRIME DISTRIBUTION OF ELASTIC J/PSI EVENTS FOR ALL Q2 AND NU WITH 280 GEV MUON BEAM.

Table 2

NORMALIZED Q**2 DISTRIBUTION OF ELASTIC J/PSI EVENTS FOR ALL NU AND T WITH 280 GEV MUON BEAM.

Table 3

EXTRAPOLATION OF Q**2 AND T DEPENDENCE TO CALCULATE D(SIG)/DT AT Q**2=0 AND T=0 FOR ELASTIC J/PSI PHOTOPRODUCTION PER NUCLEON.

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K+ P AND K- P ELASTIC SCATTERING AT 32.1-GEV/C. FRANCE-SOVIET UNION AND CERN-SOVIET UNION COLLABORATIONS

Lewin, C. ; Denegri, D. ; Givernaud, A. ; et al.

Z.Phys.C 3 (1979) 275-284, 1979.

Inspire Record 148166 DOI 10.17182/hepdata.15899

None

2 data tables

Table 1

CROSS-OVER IS AT -T = 0.17 +- 0.02 GEV**2. DIVIDE BY 20 TO GET D(SIG)/DT IN MB/GEV**2. CORRECTED FOR LOST EVENTS FOR -T < 0.12 GEV**2.

Table 2

FROM QUADRATIC EXPONENTIAL FIT TO D(SIG)/DT. BOTH STATISTICAL AND SYSTEMATIC ERRORS INCLUDED IN VALUES.

A STUDY OF K- P INTERACTIONS IN DEUTERIUM IN THE center-of-mass ENERGY RANGE FROM 1.60-GEV TO 1.74-GEV

Braun, O. ; Hepp, V. ; Strobele, H. ; et al.

Nucl.Phys.B 160 (1979) 467-491, 1979.

Inspire Record 149040 DOI 10.17182/hepdata.34586

We present results of a K − d bubble-chamber experiment at four K − momenta between 680 and 840 MeV/ c . The validity of the spectator model for the analysisof KN interactions in deuterium is discussed. Cross sections are determined for the reactions K − p → Σ − π + , K − p → Σ + π − and K − p → Λπ + π − and are compared to those obtain ed on free protons.

5 data tables

Table 1

No description provided.

Table 2

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Table 3

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Measurement of Shadowing in Photon - Nucleus Total Cross-sections From 20-{GeV} to 185-{GeV}

Caldwell, David O. ; Cumalat, John P. ; Eisner, A.M. ; et al.

Phys.Rev.Lett. 42 (1979) 553, 1979.

Inspire Record 132972 DOI 10.17182/hepdata.20769

We have measured total hadronic photoproduction cross sections on carbon, copper, and lead. Tagged-photon energies ranged from 20 to 185 GeV for copper and from 45 to 82 GeV for carbon and lead. The energy and A dependence of shadowing were computed by comparing these results to the hydrogen cross section as measured nearly simultaneously with the same apparatus. We observed somewhat more shadowing than did most experiments at lower photon energies.

8 data tables

Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

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Diffraction Dissociation of High Energy Protons on Hydrogen and Deuterium Targets

Akimov, Y. ; Bartenev, V. ; Cool, R. ; et al.

Phys.Rev.Lett. 39 (1977) 1432, 1977.

Inspire Record 121766 DOI 10.17182/hepdata.21002

We report results from a measurement of the inclusive processes pp→Xp and pd→Xd in the range 5

4 data tables

Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

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Measurement of J/$\psi$ (3100) Photoproduction in Deuterium at 55-GeV

Nash, T. ; Belousov, A. ; Govorkov, B. ; et al.

Phys.Rev.Lett. 36 (1976) 1233, 1976.

Inspire Record 108460 DOI 10.17182/hepdata.12555

We report the result of a brief experiment to measure the cross section for photoproduction of Jψ(3100). At a mean energy of 55 GeV we find this cross section per nucleon to be 37.5 ± 8.2 (statistical) ± 4 (systematic) nb. The result establishes the previously indicated rise in Jψ photoproduction on protons above 20 GeV and suggests that the rise has occurred by 55 GeV.

1 data table

Table 1

CROSS SECTION PER NUCLEON DERIVED FROM DEUTERIUM DATA ASSUMING INCOHERENT PART OF T DISTRIBUTION HAS EXPERIMENTAL SLOPE OF 1.8 +- 0.4 GEV**-2, 6 PCT COHERENT PART CALCULATED WITH KNOWN DEUTERIUM WAVE FUNCTION AND NEGLECTING SHADOWING. The mean P quoted in the table assumes the J/PSI energy equals the photon energy.

Inclusive Cross-Sections for 180-Degree Production of High-Energy Protons, Deuterons, and Tritons in p-Nucleus Collisions at 600-MeV and 800-MeV

Frankel, S. ; Frati, W. ; Van Dyck, O. ; et al.

Phys.Rev.Lett. 36 (1976) 642, 1976.

Inspire Record 100888 DOI 10.17182/hepdata.21102

The inclusive cross sections, measured up to large values of effective mass (≡q22ν), are well fitted by dσd3p=Bxexp(−αxp22mx). Values of Bx and αx are given for Be, C, Cu, and Ta at the incident proton energy of 600 MeV and for Ag, Ta, and Pt at 800 MeV. Extremely large dp and tp ratios and large A and q2 dependences of the relative cross sections are observed.

2 data tables

Table 1

D3(SIG)/D3(P) is fitted by the equation: CONST*exp(-SLOPE*P**2/(2*M)). CONST is presented per nucleon.

Table 2

D3(SIG)/D3(P) is fitted by the equation: CONST*exp(-SLOPE*P**2/(2*M)). CONST is presented per nucleon.

Cross-Sections for the Photodisintegration of Deuterium at Intermediate-Energies

Dougan, P. ; Ramsay, V. ; Stiefler, W. ;

Z.Phys.A 276 (1976) 55-64, 1976.

Inspire Record 99793 DOI 10.17182/hepdata.16618

The cross-sections for deuteron photo-disintegration have been measured at nine c.m. angles from 37 to 143 degrees. The minimum and maximum photon energies have been 139 and 832 MeV respectively. The results are in agreement with earlier data above 300 MeV, but are significantly larger below 200 MeV, the discrepancies being up to 50% at the lowest energies measured.

9 data tables

Table 1

MEAN SCATTERING ANGLE FOR THIS DATA GROUP IS 36.9 DEG.

Table 2

MEAN SCATTERING ANGLE FOR THIS DATA GROUP IS 53.1 DEG.

Table 3

MEAN SCATTERING ANGLE FOR THIS DATA GROUP IS 66.4 DEG.

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Study of three quasi-two-body channels from pi + p interactions at 3.9 GeV/c

Haber, B. ; Hodous, M.F. ; Hulsizer, R.I. ; et al.

Phys.Rev.D 11 (1975) 495-509, 1975.

Inspire Record 107224 DOI 10.17182/hepdata.24871

The pπ+π0 and pπ+π+π− final states from π+p interactions at 3.9 GeV/c have been analyzed by the prism-plot technique and the following three quasi-two-body channels have been studied in detail: π+p→ρ+p, π+p→π0Δ++, and π+p→ρ0Δ++. Results are presented on cross sections, differential cross sections, and single and joint spin density matrix elements. These are compared with the Dar-Watts-Weisskopf absorption model and Reggeized pion-exchange model predictions. Relations among joint spin density matrix elements for ρ0Δ++ are compared with quark-model predictions.

2 data tables

Table 1

No description provided.

Table 2

No description provided.

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Two Particle Correlations Between Secondary Protons Arising From $\pi^- c^-$12 Interactions at 40-{GeV}/c

MEASUREMENT OF J / psi PRODUCTION IN 280-GeV/c mu+ IRON INTERACTIONS

K+ P AND K- P ELASTIC SCATTERING AT 32.1-GEV/C. FRANCE-SOVIET UNION AND CERN-SOVIET UNION COLLABORATIONS

A STUDY OF K- P INTERACTIONS IN DEUTERIUM IN THE center-of-mass ENERGY RANGE FROM 1.60-GEV TO 1.74-GEV

Measurement of Shadowing in Photon - Nucleus Total Cross-sections From 20-{GeV} to 185-{GeV}

Diffraction Dissociation of High Energy Protons on Hydrogen and Deuterium Targets

Measurement of J/$\psi$ (3100) Photoproduction in Deuterium at 55-GeV

Inclusive Cross-Sections for 180-Degree Production of High-Energy Protons, Deuterons, and Tritons in p-Nucleus Collisions at 600-MeV and 800-MeV

Cross-Sections for the Photodisintegration of Deuterium at Intermediate-Energies

Study of three quasi-two-body channels from pi + p interactions at 3.9 GeV/c