New analysis of the radiative decay {omega}{yields}{eta}{gamma} in proton-antiproton annihilation at rest

Journal Article · Tue Feb 01 04:00:00 EST 2000 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PhysRevD.61.032002· OSTI ID:20215247

Case, T ^[1]; Crowe, K M ^[1]; Heinsius, F H ^[1]; Kammel, P ^[1]; Lakata, M ^[1]; Degener, T ^[2]; Koch, H ^[2]; Kunze, M ^[2]; Kurilla, U ^[2]; Matthaey, H ^[2]

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1. University of California, LBNL, Berkeley, California 94720 (United States)
2. Universitaet Bochum, D-44780 Bochum, Federal Republic of Germany (Germany)

We report on a measurement of the branching ratio of the rare decay {omega}{yields}{eta}{gamma} relative to the well known decay {omega}{yields}{pi}{sup 0}{gamma}. The {omega}'s are produced in pp(bar sign){yields}{eta}{omega} and pp(bar sign){yields}{pi}{sup 0}{omega}. Eigenstate mixing and interference effects of the {omega} and {rho}{sup 0} are taken into account, as well as coherent interference with the background. We find evidence for the non-resonant annihilation channel B(pp(bar sign){yields}{eta}{eta}{gamma})=(3.5{+-}1.3)x10{sup -5} and limit the value of B({omega}{yields}{eta}{gamma}) to the range of (0.7 to 5.5)x10{sup -4} depending on the degree of coherence with the background. (c) 2000 The American Physical Society.

• OSTI ID: 20215247
• Journal Information: Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 3 Vol. 61; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BRANCHING RATIO
ETA MESONS
EXPERIMENTAL DATA
OMEGA PARTICLES
PHOTONS
PIONS NEUTRAL
PROTON-ANTIPROTON INTERACTIONS
RADIATIVE DECAY