Is there a new pseudoscalar particle

Journal Article · Thu Sep 01 04:00:00 EDT 1988 · Mod. Phys. Letters B; (United States)

DOI:https://doi.org/10.1142/S0217732388001331· OSTI ID:6189493

Samuel, M A

The decay rate of orthopositronium has recently been measured in a new high precision experiment. The result is 10 standard deviations above the theoretical value. It is shown that a light neutral pseudoscalar R may resolve this discrepancy and still be consistent with the anomalous magnetic moments of the electron and the muon. If the mass m/sub R/ less than or equal to 5.7 keV, then the existence of this proposed particle R is consistent with the beam-dump experiments. The lifetime of R is large, tau greater than or equal to 0.14 s.

• Research Organization: Dept. of Physics, Oklahoma State Univ., Stillwater, OK (US)
• OSTI ID: 6189493
• Journal Information: Mod. Phys. Letters B; (United States), Journal Name: Mod. Phys. Letters B; (United States) Vol. 3:11; ISSN MPLBE
• 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
BOSONS
DATA
ELECTRONS
ELEMENTARY PARTICLES
EXPERIMENTAL DATA
FERMIONS
HADRONS
INFORMATION
LEPTONS
LIFETIME
MAGNETIC MOMENTS
MESONS
MUONS
NUMERICAL DATA
PSEUDOSCALAR MESONS