Search for narrow structure in proton-antiproton annihilation cross sections from 1900 to 1960 MeV

Conference · Tue Jan 01 00:00:00 EST 1985

OSTI ID:5603654

Lowenstein, D I; Pealsee, D C; Miller, R J; Lewis, R A; Oh, B Y; Smith, G A; Whitmore, J; Brando, T; Daftari, I; deGuzman, A

The anti pp annihilation cross section has been measured with good resolution (approx.2 MeV rms) in the mass range 1900-1960 MeV. No narrow structures are seen, the 90% confidence level upper limit being 8-12 mb-MeV for the integrated area of a resonance in this mass range. However, we do not rule out a very narrow bump-dip structure seen in an earlier experiment in the 1935-1941 MeV mass interval. The data also do not support the existence of a broad structure previously reported at 1937 MeV.

• Research Organization: Brookhaven National Lab., Upton, NY (USA); Maryland Univ., College Park (USA); Michigan State Univ., East Lansing (USA); Pennsylvania State Univ., University Park (USA); Temple Univ., Philadelphia, PA (USA)
• DOE Contract Number: AC02-76CH00016
• OSTI ID: 5603654
• Report Number(s): BNL-36569; CONF-8504133-3; ON: DE85013302
• Resource Relation: Conference: International conference on hadron spectroscopy, College Park, MD, USA, 20 Apr 1985; Other Information: Portions of this document are illegible in microfiche products
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
PROTON-ANTIPROTON INTERACTIONS
ANNIHILATION
MASS SPECTRA
TOTAL CROSS SECTIONS
DATA COVARIANCES
EXPERIMENTAL DATA
MASS RESOLUTION
TIME-OF-FLIGHT METHOD
BARYON-BARYON INTERACTIONS
BASIC INTERACTIONS
CROSS SECTIONS
DATA
ELECTROMAGNETIC INTERACTIONS
HADRON-HADRON INTERACTIONS
INFORMATION
INTERACTIONS
NUCLEON-ANTINUCLEON INTERACTIONS
NUMERICAL DATA
PARTICLE INTERACTIONS
RESOLUTION
SPECTRA
645100* - High Energy Physics- Particle Interactions & Properties-Experimental