Search for {eta}-mesic helium using WASA-at-COSY

Journal Article · Thu Aug 05 00:00:00 EDT 2010 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.3483429· OSTI ID:21435978

Moskal, P ^[1]

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1. Institute of Physics, Jagellonian University, 30-059 Cracow (Poland)

The installation of the WASA detector at the cooler synchrotron COSY opened the possibility to search for {eta}-mesic helium with high statistics and high acceptance. A search for the {sup 4}He--{eta} bound state is conducted via an exclusive measurement of the excitation function for the dd{yields}{sup 3}Hep{pi}{sup -} reaction varying continuously the beam momentum around the threshold for the dd{yields}{sup 4}He{eta} reaction. Ramping of the beam momentum and taking advantage of the large acceptance of the WASA detector allows to minimize systematical uncertainities.

• OSTI ID: 21435978
• Journal Information: AIP Conference Proceedings, Vol. 1257, Issue 1; Conference: HADRON 2009: 13. international conference on hadron spectroscopy, Tallahassee, FL (United States), 29 Nov - 4 Dec 2009; Other Information: DOI: 10.1063/1.3483429; (c) 2010 American Institute of Physics; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
BOUND STATE
COSY STORAGE RING
DEUTERIUM TARGET
DEUTERON REACTIONS
ETA MESONS
EXCITATION FUNCTIONS
EXCLUSIVE INTERACTIONS
HELIUM 4
MULTIPARTICLE SPECTROMETERS
NUCLEAR STRUCTURE
PARTICLE IDENTIFICATION
STATISTICS
ACCELERATORS
BOSONS
CHARGED-PARTICLE REACTIONS
CROSS SECTIONS
CYCLIC ACCELERATORS
DIFFERENTIAL CROSS SECTIONS
ELEMENTARY PARTICLES
EVEN-EVEN NUCLEI
FUNCTIONS
HADRONS
HELIUM ISOTOPES
INTERACTIONS
ISOTOPES
LIGHT NUCLEI
MATHEMATICS
MEASURING INSTRUMENTS
MESONS
NUCLEAR REACTIONS
NUCLEI
PARTICLE INTERACTIONS
PSEUDOSCALAR MESONS
SPECTROMETERS
STABLE ISOTOPES
STORAGE RINGS
SYNCHROTRONS
TARGETS