Measurement of the branching ratio of a rare decay {eta}{yields}{pi}{sup 0}{gamma}{gamma} with WASA-at-COSY

Journal Article · Mon Oct 24 04:00:00 EDT 2011 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.3647211· OSTI ID:21608460

Lalwani, Kavita ^[1]

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1. Department of Physics, Indian Institute of Technology Bombay (India)

In this paper we present the preliminary results on the measurement of the branching ratio of a rare decay {eta}{yields}{pi}{sup 0}{gamma}{gamma} with the WASA Detector at COSY. We have used a sample of 10{sup 7}{eta} mesons produced at the COSY ring using the pd{yields}{sup 3}He{eta} reaction close to threshold. We detail the intricate extraction of the signal, which has about 360{+-}70(stat){eta}{yields}{pi}{sup 0}{gamma}{gamma} events, from the overwhelming background channels for example {eta}{yields}3{pi}{sup 0}, pd{yields}{sup 3}He 3{pi}{sup 0} and pd{yields}{sup 3}He 2{pi}{sup 0}.

• OSTI ID: 21608460
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 1374; ISSN APCPCS; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ACCELERATORS
BARYON REACTIONS
BARYON-BARYON INTERACTIONS
BOSONS
BRANCHING RATIO
CHARGED-PARTICLE REACTIONS
CHIRAL SYMMETRY
COSY STORAGE RING
CYCLIC ACCELERATORS
DECAY
DEUTERIUM TARGET
DIMENSIONLESS NUMBERS
ELEMENTARY PARTICLES
ETA MESONS
EVEN-ODD NUCLEI
HADRON REACTIONS
HADRON-HADRON INTERACTIONS
HADRONS
HELIUM 3
HELIUM ISOTOPES
INTERACTIONS
ISOTOPES
LIGHT NUCLEI
MASSLESS PARTICLES
MEASURING INSTRUMENTS
MESONS
MULTIPARTICLE SPECTROMETERS
NUCLEAR REACTIONS
NUCLEI
NUCLEON REACTIONS
NUCLEON-NUCLEON INTERACTIONS
PARTICLE DECAY
PARTICLE IDENTIFICATION
PARTICLE INTERACTIONS
PERTURBATION THEORY
PHOTONS
PIONS
PIONS NEUTRAL
PROTON REACTIONS
PROTON-NUCLEON INTERACTIONS
PSEUDOSCALAR MESONS
SPECTROMETERS
STABLE ISOTOPES
STORAGE RINGS
SYMMETRY
SYNCHROTRONS
TARGETS