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Spectroscopy of Lambda-9Li by electroproduction
- Source :
- Phys. Rev. C 91, 034308 (2015)
- Publication Year :
- 2014
-
Abstract
- In the absence of accurate data on the free two-body hyperon-nucleon interaction, the spectra of hypernuclei can provide information on the details of the effective hyperon-nucleon interaction. Electroproduction of the hypernucleus Lambda-9Li has been studied for the first time with sub-MeV energy resolution in Hall A at Jefferson Lab on a 9Be target. In order to increase the counting rate and to provide unambiguous kaon identification, two superconducting septum magnets and a Ring Imaging CHerenkov detector (RICH) were added to the Hall A standard equipment. The cross section to low-lying states of Lambda-9Li is concentrated within 3 MeV of the ground state and can be fitted with four peaks. The positions of the doublets agree with theory while a disagreement could exist with respect to the relative strengths of the peaks in the doublets. A Lambda separation energy of 8.36 +- 0.08 (stat.) +- 0.08 (syst.) MeV was measured, in agreement with an earlier experiment.<br />Comment: 14 pages, 8 figures
- Subjects :
- Nuclear Experiment
Subjects
Details
- Database :
- arXiv
- Journal :
- Phys. Rev. C 91, 034308 (2015)
- Publication Type :
- Report
- Accession number :
- edsarx.1405.5839
- Document Type :
- Working Paper
- Full Text :
- https://doi.org/10.1103/PhysRevC.91.034308