Proton-helium elastic scattering from 45 to 400 GeV

Journal Article · Fri May 01 04:00:00 EDT 1981 · Phys. Rev., D; (United States)

OSTI ID:6391990

Buiak, A; Devensky, P; Kuznetsov, A; Morozov, B; Nikitin, V; Nomokonov, P; Pilipenko, Y; Smirnov, V; Jenkins, E; Malamud, E; Miyaiima, M; Yamada, R

The elastic proton-helium differential cross section has been determined for incident laboratory energies from 45 to 400 GeV in the range 0.003< or =Vertical BartVertical Bar< or =0.52 (GeV/c)/sup 2/ by means of the internal-gas-jet-target technique. The differential cross section drops 4 --5 orders of magnitude to the first dip at Vertical BartVertical Barapprox. =0.22 (GeV/c)/sup 2/. The shrinkage in the slope of the differential cross section is found to be twice as fast as that in the proton-proton case. The slope parameter at Vertical BartVertical Barapprox. =0 is described by the formula b = 24+1.13 ln s, where b is in (GeV/c)/sup -2/ and s is in GeV/sup 2/. The elastic proton-helium cross section is normalized to the known elastic proton-proton cross section using data taken with a helium and hydrogen mixture as a target. The proton-helium total cross section is determined from the optical theorem. The total cross section rises by 4% between 100 and 400 GeV. Results are presented on the real part of the elastic-scattering amplitude and on the total elastic cross section. The experimental differential cross sections are compared to Glauber-model predictions.

• Research Organization: Joint Institute for Nuclear Research, Dubna, Union of Soviet Socialist Republic
• OSTI ID: 6391990
• Journal Information: Phys. Rev., D; (United States), Journal Name: Phys. Rev., D; (United States) Vol. 23:9; ISSN PRVDA
• Country of Publication: United States
• Language: English

Related Subjects

645103* -- High Energy Physics-- Particle Interactions &amp; Properties-Experimental-- Strong Interactions &amp; Baryon &amp; Meson Properties
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BARYON REACTIONS
CHARGED-PARTICLE REACTIONS
CROSS SECTIONS
DATA
DIFFERENTIAL CROSS SECTIONS
ELASTIC SCATTERING
ENERGY RANGE
EXPERIMENTAL DATA
GEV RANGE
GEV RANGE 10-100
GEV RANGE 100-1000
GLAUBER THEORY
HADRON REACTIONS
HELIUM 4 TARGET
INFORMATION
MULTIPLE SCATTERING
NUCLEAR REACTIONS
NUCLEON REACTIONS
NUMERICAL DATA
PROTON REACTIONS
SCATTERING
TARGETS
TOTAL CROSS SECTIONS