Elastic and total cross section measurement at the CERN proton-antiproton collider

Technical Report · Thu Dec 01 04:00:00 EST 1983

OSTI ID:5072489

Hodges, C L

Proton-antiproton elastic scattering at a center of mass energy of 540 GeV has been measured at the CERN collider. The t range of .04 < -t < .45 (GeV/c)/sup 2/ has been studied in two parts. For the lower t range .04 < -t < .18 (GeV/c)/sup 2/ the data are well fit by the form e/sup -bt/ with b = 17.1 +- 1.0 (GeV/c)/sup 2/. In the higher t range .21 < -t < .45 (GeV/c)/sup 2/ the data is again well fit by an exponential but with b = 13.7 +- .2/sub ran/ +- .2/sub sys/. Both values agree with earlier measurements and with the model independent extrapolations from measurements at lower energies. A luminosity measurement combined with the optical theorem is used to find the total proton-antiproton nuclear cross section sigma/sub tot/ = 67.6 +- 5.9/sub ran/ +- 2.7/sub sys/ millibarn. The ratio of elastic to total cross section is sigma/sub el//sigma/sub tot/ = .209 +- .018/sub ran/ +- .008/sub sys/. These values confirm the continued rise with increasing energy of the total cross section. The measured values are compared with extrapolations from lower energies. 15 references.

• Research Organization: California Univ., Riverside (USA)
• DOE Contract Number: AT03-76ER70107
• OSTI ID: 5072489
• Report Number(s): DOE/ER/70107-T4; ON: DE84008936
• Country of Publication: United States
• Language: English

Related Subjects

645101 -- High Energy Physics-- Particle Interactions &amp; Properties-Experimental-- Electromagnetic Interactions &amp; Properties
645103* -- High Energy Physics-- Particle Interactions &amp; Properties-Experimental-- Strong Interactions &amp; Baryon &amp; Meson Properties
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BARYON-BARYON INTERACTIONS
BEAMS
COLLIDING BEAMS
CROSS SECTIONS
DATA
DIFFERENTIAL CROSS SECTIONS
ELASTIC SCATTERING
ENERGY RANGE
EXPERIMENTAL DATA
GEV RANGE
GEV RANGE 100-1000
HADRON-HADRON INTERACTIONS
INFORMATION
INTERACTIONS
NUCLEON-ANTINUCLEON INTERACTIONS
NUMERICAL DATA
PARTICLE INTERACTIONS
PROTON-ANTIPROTON INTERACTIONS
SCATTERING
TOTAL CROSS SECTIONS