Published April 2, 2010
| Version v1
Journal article
Indication of a Deeply Bound and Compact K-pp State Formed in the pp→pΛK+ Reaction at 2.85 GeV
Creators
- 1. RIKEN Nishina Center, Wako, Saitama, 351-0198 Japan (Japan)
- 2. Department of Physics, University of Tokyo, Tokyo, 116-0033 Japan (Japan)
- 3. Dipartimento di Fisica Generale ''A. Avogadro'' and INFN, Torino (Italy)
- 4. Excellence Cluster Universe, Technische Universitaet Muenchen, Garching (Germany)
- 5. Stefan Meyer Institute for Subatomic Physics, Austrian Academy of Sciences, Vienna (Austria)
- 6. Laboratoire National Saturne, CEA Saclay (France)
- 7. Dipartimento di Fisica Generale 'A. Avogadro' and INFN, Torino (Italy)
- 8. Indiana University Cyclotron Facility, Bloomington, Indiana (United States)
Description
We have analyzed data of the DISTO experiment on the exclusive pp→pΛK+ reaction at 2.85 GeV to search for a strongly bound compact K-pp(≡X) state to be formed in the pp→K++X reaction. The observed spectra of the K+ missing mass and the pΛ invariant-mass with high transverse momenta of p and K+ revealed a broad distinct peak of 26-σ confidence with a mass MX=2267±3(stat)±5(syst) MeV/c2 and a width ΓX=118±8(stat)±10(syst) MeV. The enormously large cross section indicates formation of a compact K-pp with a large binding energy of BK=103 MeV, which can be a possible gateway toward cold and dense kaonic nuclear matter.
Additional details
Identifiers
- DOI
- 10.1103/PhysRevLett.104.132502;
- arXiv
- arXiv:1002.3526v1;
Publishing Information
- Journal Title
- Physical Review Letters
- Journal Volume
- 104
- Journal Issue
- 13
- Journal Page Range
- p. 132502-132502.5
- ISSN
- 0031-9007
- CODEN
- PRLTAO
INIS
- Country of Publication
- United States
- Country of Input or Organization
- International Atomic Energy Agency (IAEA)
- INIS RN
- 42003773
- Subject category
- S73: NUCLEAR PHYSICS AND RADIATION PHYSICS; S72: PHYSICS OF ELEMENTARY PARTICLES AND FIELDS;
- Descriptors DEI
- BINDING ENERGY; CROSS SECTIONS; GEV RANGE; KAONS MINUS; KAONS PLUS; MEV RANGE; MISSING MASS; MISSING-MASS SPECTRA; NUCLEAR MATTER; TRANSVERSE MOMENTUM
- Descriptors DEC
- BOSONS; ELEMENTARY PARTICLES; ENERGY; ENERGY RANGE; HADRONS; KAONS; LINEAR MOMENTUM; MASS; MATTER; MESONS; PSEUDOSCALAR MESONS; SPECTRA; STRANGE MESONS; STRANGE PARTICLES
Optional Information
- Notes
- (c) 2010 The American Physical Society