Murphy, P.G.
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Total hadronic (gamma, p) and (gamma, d) cross-sections from 4 to 18 gev/c

Caldwell, David O. ; Elings, V.B. ; Hesse, W.P. ; et al.
Phys.Rev.Lett. 25 (1970) 609-612, 1970.
Inspire Record 62881 DOI 10.17182/hepdata.21598

Photoabsorption cross sections in hydrogen and deuterium have been measured from 3.7 to 17.9 GeV. The energy dependences are similar to those of strong-interaction total cross sections, as expected from the vector-meson-dominance model. The magnitude of σT(γp) can be compared with data from γp→ρ0p to determine a γ−p coupling constant, γρ24π=0.37±0.03. This value disagrees with that obtained on the ρ mass shell, and hence there is only qualitative agreement with the vector-meson-dominance model.

1 data table
Table 1

Axis error includes +- 1/1 contribution (CORRECTION OF ACCEPTANCE, POSSIBLE LOSSES, ETC).


Dependence of nu nucleus cross-sections on the mass number

Borer, K. ; Hahn, B. ; Hofer, H. ; et al.
Phys.Lett.B 30 (1969) 572-575, 1969.
Inspire Record 63243 DOI 10.17182/hepdata.50061

High energy v -nucleus cross sections have been compared for Pb, Fe, Al and C as target nuclei, exposed to the CERN v -beam. The events with θ vμ < 29 0 and p μ ⪆ 1 GeV /c have rates in the ratio of the mass number of the nuclei. Also a restricted sample with q 2 ⪅ 0.1 (GeV/ c ) 2 and θ vμ < 5 0 does not reveal a theoretically predicted deviation from A -proportionality, although due to the limited statistical accuracy in this restricted sample an “ A 2 3 - contribution ” of several tenths cannot be excluded either.

4 data tables
Table 1

Only statistical error is presented.

Table 2

Only statistical error is presented.

Table 3

Only statistical error is presented.

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Search for Resonance Formation in Antiproton-Proton Elastic Scattering from 1.6 to 2.2 GeV/c

Lys, J. ; Chapman, J.W. ; Falconer, D.G. ; et al.
Phys.Rev.Lett. 21 (1968) 1116-1119, 1968.
Inspire Record 944915 DOI 10.17182/hepdata.21704

We have measured the antiproton-proton elastic differential cross section in the center-of-mass angular range cosθ=−0.985 to +0.40 at six momenta between 1.6 and 2.2 GeV/c in a bubble-chamber experiment. We use the data to look for evidence of direct-channel boson resonances.

1 data table
Table 1

No description provided.


Polarization in pi--p Scattering between 500 and 940 Mev

Beall, E.F. ; Cork, B. ; Murphy, P.G. ; et al.
Phys.Rev. 126 (1962) 1554-1560, 1962.
Inspire Record 944982 DOI 10.17182/hepdata.26812

A graphite-plate spark chamber has been used to analyze the polarization of protons recoiling from π−−p scattering. The observations were made at 90° (c.m. system) pion scattering angle for seven incident pion energies between 500 and 940 Mev, at 120° or 135° for five energies in this interval, and also at 75° for 500 Mev only. The results are compared with predictions of several models used to explain the maxima in the π−−p scattering cross section. Qualitative arguments show that the energy intervals between these maxima are not completely dominated by neighboring single-state resonances. Phase shifts found to be large in scattering also seem to be large in polarization.

10 data tables
Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

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