U. Amaldi

Measurements of the proton--proton total cross section by means of Coulomb scattering at the CERN Intersecting Storage Rings.

Abstract Proton-proton elastic scattering has been measured at the CERN Intersecting Storage Rings in the four-momentum transfer range 0.001 ⩽… t …⩽ 0.015 GeV 2 at centre-of-mass energies of 23 and 31 GeV. The detection of Coulomb scattering and of its interference with nuclear scattering leads to the determination of the real part of the nuclear amplitude and of the total proton-proton cross section by the optical theorem.

Measurements of small angle proton-proton elastic scattering at the CERN intersecting storage rings

Abstract Proton-proton elastic scattering has been measured over the angular range 7 to 16 mrad at centre-of-mass energies of 31, 45 and 53 GeV using the CERN Intersecting Storage Rings. The results indicate that the diffraction peak has continued to shrink with increasing energy, but not as fast as suggested by the results at lower energies.

Proton proton elastic scattering and nucleon resonance production at high-energies

Abstract Angular distributions of proton-proton elastic scattering have been measured for incident beam momenta of 10.0, 12.0, 14.2 and 24.0 GeV/ c over a range of lab scattering angles from 12 to 152 mrad. This is equivalent to a range of four-momentum transfer squared from about 0.1 to 6.7 GeV 2 at the highest momentum. Nucleon resonance production in the two-body reaction p + p → p + X has been studied at 24.0 GeV/ c incident momentum from 13.5 to 112 mrad by measuring the proton momentum spectra from the elastic peak down to a momentum corresponding to a missing mass of about 2.6 GeV. The new data are compared with previous results and theoretical models.

THE (e,e'p) REACTION IN CALCIUM INDUCED BY 580-750 Mev ELECTRONS

Abstract The spectrum of electron-proton coincidences in calcium as a function of the incoming electron energy is presented and the results are briefly discussed.

Proton angular distribution in the high energy 12C(e, e′p) 11B reaction☆

Abstract The angular distributions of protons extracted by 600 MeV electrons from the 1s and 1p shells of 12 C were measured and the results analyzed in terms of two simple nuclear potential wells.

Energy dependence of the structure in high energy proton-proton elastic scattering

Abstract The angular distribution of proton-proton elastic scattering has been measured for incident beam momenta of 10.0, 12.0, 14.2 and 24.0 GeV/c over a range of laboratory scattering angles from 12 to about 140 mrad. The results are compared with the fourth power of the electromagnetic form of the proton.

Momentum transfer dependence of nucleon resonance production in proton-proton collisions at 24 GeV/c

Abstract Nucleon resonance production in the two-body reaction p + p → p + N ∗ has been studied at 24 GeV/ c incident momentum for angles from 12 to 117 mrad by measuring proton momentum spectra from the elastic peak down to a momentum corresponding to a missing mass of about 2.6 GeV.

Study of elastic proton-neutron scattering by means of proton-deuteron scattering at 24.0 gev/c

Abstract Measurements of proton-deuteron scattering have been performed using an incident 24.0 GeV/ c proton beam. Momentum-loss spectra of forward-scattered protons were measured by a single-arm spectrometer over a range of proton angles from 13 to 107 mr. The contributions to the proton spectra of single and double scattering can be separated experimentally, thus allowing estimates of proton-neutron elastic cross sections to be deduced from the data over a range of four-momentum transfer squared, |t| 5.8 GeV 2 . Elastic p - d scattering, in which the proton and deuteron were detected in coincidence, has also been measured over a range of | t | from 0.6 to 1.8 GeV 2 .