Antiproton-proton annihilation at rest into. pi. /sup 0/M and. gamma. M with M = phi, eta',. omega. , rho/sup 0/, eta, and. pi. /sup 0/

Journal Article · Sat Oct 01 04:00:00 EDT 1988 · Phys. Rev. D; (United States)

DOI:https://doi.org/10.1103/PhysRevD.38.2021· OSTI ID:6829548

Chiba, M; Fujitani, T; Iwahori, J; Kawaguti, M; Kobayashi, M; Kurokawa, S; Nagashima, Y; Omori, T; Sugimoto, S; Takasaki, M; others, and

We have carried out high-statistics measurements of inclusive ..pi../sup 0/ and ..gamma..-ray spectra from p-barp annihilation at rest. From the monochromatic peaks in the ..pi../sup 0/ spectra, we derive the yield (or its upper limit) of the reaction p-barp..--> pi../sup 0/M for M = phi, eta', ..omega.., rho/sup 0/, eta, and ..pi../sup 0/. The same quantity was independently obtained from the ..gamma..-ray spectra, which included some ..pi../sup 0/'s that were mistaken as single ..gamma.. rays due to the limited granularity of the ..gamma.. detector. Taking the monochromatic peaks in the ..gamma..-ray spectra as being due to prompt ..gamma.. rays, we also derive the upper limit for p-barp..--> gamma..M.

• Research Organization: Faculty of Engineering, Fukui University, Fukui 910, Japan National Laboratory for High Energy Physics (KEK), Tsukuba, Ibaraki 305, Japan Faculty of Science, Kyoto Sangyo University, Kita, Kyoto 603, Japan Physics Department, Osaka University, Toyonaka, Osaka 560, Japan Physics Department, Tokyo
• OSTI ID: 6829548
• Journal Information: Phys. Rev. D; (United States), Journal Name: Phys. Rev. D; (United States) Vol. 38:7; ISSN PRVDA
• Country of Publication: United States
• Language: English

Related Subjects

645103* -- High Energy Physics-- Particle Interactions & Properties-Experimental-- Strong Interactions & Baryon & Meson Properties
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ANNIHILATION
BARYON-BARYON INTERACTIONS
BARYONS
BASIC INTERACTIONS
BOSONS
ELECTROMAGNETIC INTERACTIONS
ELEMENTARY PARTICLES
ENERGY RANGE
ETA MESONS
FERMIONS
GAMMA SPECTRA
HADRON-HADRON INTERACTIONS
HADRONS
HYPERONS
INCLUSIVE INTERACTIONS
INTERACTIONS
MEASURING INSTRUMENTS
MESONS
MEV RANGE
MEV RANGE 100-1000
MULTIPLICITY
MULTIWIRE PROPORTIONAL CHAMBERS
NUCLEON-ANTINUCLEON INTERACTIONS
OMEGA BARYONS
OMEGA PARTICLES
PARTICLE INTERACTIONS
PARTICLE PRODUCTION
PIONS
PIONS NEUTRAL
PROPORTIONAL COUNTERS
PROTON-ANTIPROTON INTERACTIONS
PSEUDOSCALAR MESONS
RADIATION DETECTORS
SPECTRA
STRANGE PARTICLES
TIME-OF-FLIGHT METHOD