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Proton Compton Effect for 300-MeV Photons

Gray, E.R. ; Hanson, A.O. ;

Phys.Rev. 160 (1967) 1212-1215, 1967.

Inspire Record 944949 DOI 10.17182/hepdata.26568

The scattering of photons by protons has been measured with a spark-chamber technique using 335-MeV bremsstrahlung. The experimental values obtained at 90° and 135° are compared with those calculated by Contogouris using dispersion relations. The agreement is reasonable except for a persistently low point for 310 MeV at 90°.

3 data tables

Table 1

No description provided.

Table 2

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Table 3

No description provided.

Production of charged pions by 730-MeV protons from hydrogen and selected nuclei

Cochran, D.R.F. ; Dean, P.N. ; Gram, P.A.M. ; et al.

Phys.Rev.D 6 (1972) 3085-3116, 1972.

Inspire Record 73637 DOI 10.17182/hepdata.22253

An experiment was done in the external proton beam of the Berkeley 184-in. cyclotron to measure the production cross sections for pions from various target nuclei, from hydrogen to lead. The cross-section data are presented and the reaction mechanisms discussed. The hydrogen production appears to fit the one-pion-exchange model.

1 data table

Table 1

No description provided.

Observations on anti-p d annihilations at rest into two pions

Gray, L. ; Papadopoulou, T. ; Simopoulou, E. ; et al.

Phys.Rev.Lett. 30 (1973) 1091-1094, 1973.

Inspire Record 84510 DOI 10.17182/hepdata.21409

The ratio (p¯d→π−π0ps)(p¯d→π−π+n) at rest, with spectator momenta ≲300 MeVc, has been measured and found to be 0.68 ± 0.07. This implies that (75 ± 8)% of the annihilations in deuterium into two pions come from odd N¯N orbital angular momenta, in disagreement with the S-state-dominance hypothesis. It has also been observed that the p¯d→π−π0ps production rate depends on the spectator momentum, which suggests energy-sensitive N¯N phenomena near threshold.

1 data table

Table 1

RELATIVE ANNIHILATION FREQUENCY AT REST.

Measurement of sigma(tot) in proton proton scattering in pure spin states

Parker, E.F. ; Ratner, L.G. ; Brown, B.C. ; et al.

Phys.Rev.Lett. 31 (1973) 783-786, 1973.

Inspire Record 83779 DOI 10.17182/hepdata.21350

An experiment was done using the new accelerated polarized proton beam at the Argonne National Laboratory zero-gradient synchrotron and a polarized proton target. The total cross section for proton-proton scattering at 3.5 GeV/c was measured in the spin states ↑↑ and ↑↓ perpendicular to the beam direction. The two cross sections were found to be equal within the experimental error of ±5%.

1 data table

Table 1

TOTAL CROSS SECTION DIFFERENCE FOR PURE TRANSVERSE SPIN STATES.

Measurement of elastic proton proton scattering in pure initial-spin states

O' Fallon, J.R. ; Parker, E.F. ; Ratner, L.G. ; et al.

Phys.Rev.Lett. 32 (1974) 77-79, 1974.

Inspire Record 94699 DOI 10.17182/hepdata.21307

An experiment was done using an accelerated polarized proton beam and a polarized proton target. The elastic cross section for proton-proton scattering at 6.0 GeV/c and P⊥2=0.5−1.6 (GeV/c)2 was measured in the spin states ↑ ↑, ↓ ↓, and ↑ ↓ perpendicular to the scattering plane. The cross sections were found to be unequal by up to a factor of 2.

1 data table

Table 1

No description provided.

Simultaneous Measurement of 2 and 3 Spins in Proton Proton Elastic Scattering at 6-GeV/c

Fernow, Richard C. ; Gray, S.W. ; Krisch, A.D. ; et al.

Phys.Lett.B 52 (1974) 243-246, 1974.

Inspire Record 89681 DOI 10.17182/hepdata.27931

The elastic cross section for proton proton scattering at 6 GeV c was measured using a 70% polarized beam and a 75% polarized target at the Argonne ZGS. In the range P ⊥ 2 = 0.5 → 2.0( GeV c ) 2 we obtained small error measurements for the ↑↑, ↓↓ and ↑↓ initial spin states perpendicular to the scattering plane. At P ⊥ 2 = 0.5 we also measured the recoil spin and found that the 5 different cross sections were very unequal.

2 data tables

Table 1

No description provided.

Table 2

No description provided.

Measurement of the Depolarization Parameter in Elastic Proton Proton Scattering at 3 and 6-GeV/c

Abshire, G.W. ; Bryant, G.W. ; Corcoran, M. ; et al.

Phys.Rev.D 12 (1975) 3393-3398, 1975.

Inspire Record 104822 DOI 10.17182/hepdata.24809

Results are presented from an experiment designed to make the first systematic study of the depolarization parameter in elastic proton-proton scattering at high energies. Measurements were made at 3.0 and 6.0 GeV/c at |t| values extending to 1.7 (GeV/c)2 at the higher momentum. A high-intensity unpolarized proton beam was incident on a polarized proton target and the polarization of the elastically scattered recoil protons was determined with a carbon analyzer. The results are discussed in the framework of optical and exchange models.

2 data tables

Table 1

No description provided.

Table 2

No description provided.

Polarization in p p Elastic Scattering at Large Four Momentum Transfers

Bryant, G.W. ; Corcoran, M. ; Crittenden, R.R ; et al.

Phys.Rev.D 13 (1976) 1-4, 1976.

Inspire Record 113034 DOI 10.17182/hepdata.24788

New results are presented from the continuation of an experiment designed to study the polarization in elastic p−p scattering at large four-momentum transfers. A high-intensity unpolarized proton beam of momentum 12.3 GeV/c was incident on a propanediol polarized proton target and both final-state protons were detected and momentum-analyzed in multiwire proportional chamber spectrometers. The measurements spanned the t range 1.5<|t|<6.2 (GeV/c)2. The results are discussed in the framework of optical, exchange, and parton models.

1 data table

Table 1

INCLUDING DATA FROM AN EARLIER RUN (ABSHIRE PRL 32, 1261 (1974)) FOUND TO BE IN STATISTICAL AGREEMENT.

Polarization measurements in $π^−$p charge exchange scattering from 618 MeV/c to 2267 MeV/c

Brown, Robert M. ; Clark, A.G. ; Davies, J.K. ; et al.

AIP Conf.Proc. 35 (1976) 189-197, 1976.

Inspire Record 117337 DOI 10.17182/hepdata.76257

Results are presented of measurements of the polarisation parameter for the reaction π−p→π°n : π°→γγ at 22 incident momenta in the resonance region. These results are generally in agreement with those of previous measurements and in qualitative agreement with predictions of phase shift analyses.

22 data tables

Table 1

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Table 3

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