Neutron-proton coincidences from Non-Mesonic Weak Decay of p-shell Λ-hypernuclei and determination of the two-nucleon induced process
Creators
- 1. INFN Sezione di Torino, via P. Giuria 1, Torino (Italy)
- 2. Dipartimento di Fisica, Politecnico di Torino, Corso Duca degli Abruzzi 24, Torino (Italy)
- 3. Laboratori Nazionali di Frascati dell'INFN, via E. Fermi 40, Frascati (Italy)
- 4. Department of Physics, Seoul National University, 151-742 Seoul (Korea, Republic of)
- 5. INFN Sezione di Pavia, via Bassi 6, Pavia (Italy)
- 6. Dipartimento di Meccanica, Universita di Brescia, via Valotti 9, Brescia (Italy)
- 7. Dipartimento di Fisica Sperimentale, Universita di Torino, Via P. Giuria 1, Torino (Italy)
- 8. SUBATECH, Ecole des Mines de Nantes, Universite de Nantes, CNRS-IN2P3, Nantes (France)
- 9. Dipartimento di Fisica Generale, Universita di Torino, Via P. Giuria 1, Torino (Italy)
- 10. Dipartimento di Fisica, Universita di Trieste, via Valerio 2, Trieste (Italy)
- 11. INFN Sezione di Trieste, via Valerio 2, Trieste (Italy)
- 12. CERN, CH-1211 Geneva 23 (Switzerland)
- 13. INFN Sezione di Bari, via Amendola 173, Bari (Italy)
- 14. Dipartimento di Fisica Universita di Bari, via Amendola 173, Bari (Italy)
Description
The decay of Λ-hypernuclei without π emission, known as Non-Mesonic Weak Decay (NMWD), gives an effective tool to investigate ΔS=1 four-baryon interactions. It was theoretically suggested that the two-nucleon induced mechanism could play a substantial role in reproducing the observed NMWD decay rates and nucleon spectra, but at present no direct evidence of such a mechanism has been obtained. The FINUDA experiment, exploiting the possibility to detect both charged and neutral particles coming from the hypernucleus decay, has allowed us to deduce the relative weight of the two nucleon induced decay rate to the total NMWD rate. The value of Γ2N/ΓNMWD=0.21±0.07stat-0.02sys+0.03sys has been deduced, well consistent with the previous determinations.
Availability note (English)
Available from http://dx.doi.org/10.1016/j.physletb.2011.06.035Additional details
Identifiers
- DOI
- 10.1016/j.physletb.2011.06.035;
- PII
- S0370-2693(11)00656-3;
Publishing Information
- Journal Title
- Physics Letters. Section B
- Journal Volume
- 701
- Journal Issue
- 5
- Journal Page Range
- p. 556-561
- ISSN
- 0370-2693
- CODEN
- PYLBAJ
INIS
- Country of Publication
- Netherlands
- Country of Input or Organization
- International Atomic Energy Agency (IAEA)
- INIS RN
- 43057353
- Subject category
- S73: NUCLEAR PHYSICS AND RADIATION PHYSICS; S72: PHYSICS OF ELEMENTARY PARTICLES AND FIELDS;
- Descriptors DEI
- BARYONS; CHARGED PARTICLES; COINCIDENCE METHODS; HYPERNUCLEI; NEUTRAL PARTICLES; P STATES; PROTON-NEUTRON INTERACTIONS; SPECTRA; WEAK PARTICLE DECAY
- Descriptors DEC
- BARYON-BARYON INTERACTIONS; COUNTING TECHNIQUES; DECAY; ELEMENTARY PARTICLES; ENERGY LEVELS; FERMIONS; HADRON-HADRON INTERACTIONS; HADRONS; INTERACTIONS; NUCLEAR FRAGMENTS; NUCLEI; NUCLEON-NUCLEON INTERACTIONS; PARTICLE DECAY; PARTICLE INTERACTIONS; PROTON-NUCLEON INTERACTIONS
Optional Information
- Copyright
- Copyright (c) 2011 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.