title: High resolution spectroscopy of (lambda)(12)B by electroproduction.
abstract: An experiment measuring electroproduction of hypernuclei has been performed in hall A at Jefferson Lab on a 12C target. In order to increase counting rates and provide unambiguous kaon identification two superconducting septum magnets and a ring imaging Cherenkov detector were added to the hall A standard equipment. An unprecedented energy resolution of less than 700 keV FWHM has been achieved. Thus, the observed (Lambda)(12)B spectrum shows for the first time identifiable strength in the core-excited region between the ground-state s-wave Lambda peak and the 11 MeV p-wave Lambda peak.
authors.affiliation: Istituto Nazionale di Fisica Nucleare, Sezione di Roma Tre, I-00146 Roma, Italy.
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