Experimental study of pp{eta} dynamics with WASA-at-COSY

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

DOI:https://doi.org/10.1063/1.3647168· OSTI ID:21608421

Shah, Neha ^[1]

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1. Department of Physics, IIT Bombay, Powai, Mumbai - 76 (India)

To investigate the interaction of {eta}-meson with the nucleons, its production, near the kinematical threshold, in proton-proton collisions has been studied with the WASA detector at COSY storage ring in Juelich, Germany. The data has been taken at beam energy 1400 MeV (corresponding to excess energy (Q = 57 MeV). The {eta}-meson was detected via its 3{pi}{sup 0} decay in nearly 4{pi} detector and two protons were measured in forward direction. The determination of four vectors of both protons and the {eta}-meson in the final state allowed to derive complete kinematical information of the pp{eta}-system. The analysis resulted in 9x10{sup 6} events of {eta}{yields}3{pi}{sup 0} giving total production cross-section (8.87{+-}0.03{sub stat}{+-}2.57{sub sys}){mu}b. The angular distribution of {eta}-meson in the center of mass frame is anisotropic and squared invariant mass distributions for proton-proton and proton-{eta} shows deviation from pure phase space.

• OSTI ID: 21608421
• 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
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ACCELERATORS
ANGULAR DISTRIBUTION
BARYON-BARYON INTERACTIONS
BARYONS
BOSONS
CHARGED PARTICLES
COSY STORAGE RING
CROSS SECTIONS
CYCLIC ACCELERATORS
DECAY
DEUTERONS
DISTRIBUTION
ELEMENTARY PARTICLES
ENERGY RANGE
ETA MESONS
FERMIONS
HADRON-HADRON INTERACTIONS
HADRONS
INTERACTIONS
MASS DISTRIBUTION
MASSLESS PARTICLES
MATHEMATICAL SPACE
MEASURING INSTRUMENTS
MESONS
MEV RANGE
MULTIPARTICLE SPECTROMETERS
NUCLEON-NUCLEON INTERACTIONS
NUCLEONS
PARTICLE DECAY
PARTICLE IDENTIFICATION
PARTICLE INTERACTIONS
PARTICLE PRODUCTION
PHASE SPACE
PHOTONS
PROTON-NUCLEON INTERACTIONS
PROTON-PROTON INTERACTIONS
PROTONS
PSEUDOSCALAR MESONS
SPACE
SPATIAL DISTRIBUTION
SPECTROMETERS
STORAGE RINGS
SYNCHROTRONS