Published June 25, 2004
| Version v1
Journal article
Photoproduction of η-mesic He3
Creators
- 1. II. Physikalisches Institut, Universitaet Giessen, D-35392 Giessen (Germany)
- 2. Institut fuer Kernphysik, Johannes-Gutenberg-Universitaet Mainz, D-55099 Mainz (Germany)
- 3. Department of Physics and Astronomy, University of Glasgow, Glasgow G128QQ (United Kingdom)
- 4. P.N. Lebedev Physical Institute, Leninsky Prospect 53, 117924, Moscow (Russian Federation)
Description
The photoproduction of η-mesic He3 has been investigated using the TAPS calorimeter at the Mainz Microtron accelerator facility MAMI. The total inclusive cross section for the reaction γHe3→ηX has been measured for photon energies from threshold to 820 MeV. The total and angular differential coherent η cross sections have been extracted up to energies of 745 MeV. A resonancelike structure just above the η production threshold with an isotropic angular distribution suggests the existence of a resonant quasibound state. This is supported by studies of a competing decay channel of such a quasibound η-mesic nucleus into π0pX. A binding energy of (-4.4±4.2) MeV and a width of (25.6±6.1) MeV is deduced for the quasibound η-mesic state in He3
Additional details
Identifiers
- DOI
- 10.1103/PhysRevLett.92.252001;
- arXiv
- arXiv:nucl-ex/0312011v3;
Publishing Information
- Journal Title
- Physical Review Letters
- Journal Volume
- 92
- Journal Issue
- 25
- Journal Page Range
- p. 252001-252001.4
- ISSN
- 0031-9007
- CODEN
- PRLTAO
INIS
- Country of Publication
- United States
- Country of Input or Organization
- International Atomic Energy Agency (IAEA)
- INIS RN
- 36019218
- Subject category
- S72: PHYSICS OF ELEMENTARY PARTICLES AND FIELDS;
- Descriptors DEI
- ACCELERATOR FACILITIES; ANGULAR DISTRIBUTION; BINDING ENERGY; CALORIMETERS; CROSS SECTIONS; HELIUM 3; MESIC ATOMS; MESONS; MEV RANGE 100-1000; PHOTON-NUCLEON INTERACTIONS; PHOTONS; PHOTOPRODUCTION; QUASIBOUND STATE
- Descriptors DEC
- ATOMS; BASIC INTERACTIONS; BOSONS; DISTRIBUTION; ELECTROMAGNETIC INTERACTIONS; ELEMENTARY PARTICLES; ENERGY; ENERGY RANGE; EVEN-ODD NUCLEI; HADRONIC ATOMS; HADRONS; HELIUM ISOTOPES; INTERACTIONS; ISOTOPES; LIGHT NUCLEI; MASSLESS PARTICLES; MEASURING INSTRUMENTS; MEV RANGE; NUCLEI; PARTICLE INTERACTIONS; PARTICLE PRODUCTION; PHOTON-BARYON INTERACTIONS; PHOTON-HADRON INTERACTIONS; STABLE ISOTOPES
Optional Information
- Notes
- (c) 2004 The American Physical Society