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Title: Spectroscopy of Li Λ 9 by electroproduction

Journal Article · · Physical Review C, Nuclear Physics

Background: 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. Purpose: To obtain a high-resolution spectrum for the 9Be(e,e'K+)9ΛLi reaction. Method: Electroproduction of the hypernucleus 9ΛLi 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. Results: The cross section to low-lying states of 9ΛLi 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 Λ separation energy, BΛ, of 8.36±0.08 (stat.) ±0.08 (syst.) MeV was measured, in agreement with an earlier experiment.

Research Organization:
Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Nuclear Physics (NP)
Contributing Organization:
Jefferson Lab Hall A Collaboration
Grant/Contract Number:
AC05-06OR23177; P203/12/2126
OSTI ID:
1171763
Alternate ID(s):
OSTI ID: 1181310
Report Number(s):
JLAB-PHY-14-1893; DOE/OR/23177-3104; arXiv:1405.5839; PRVCAN; ArticleNumber: 034308
Journal Information:
Physical Review C, Nuclear Physics, Vol. 91, Issue 3; ISSN 0556-2813
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 20 works
Citation information provided by
Web of Science

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Cited By (4)

p -shell hypernuclear energy spectra using the Gogny-interaction shell model journal November 2019
Photoproduction of K Λ on the proton journal February 2016
Strangeness in nuclear physics text January 2016
High-resolution hypernuclear spectroscopy at Jefferson Lab, Hall A text January 2018