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Experimental observation of the Σ hypernuclei, ΣH and ΣC |
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| Authors: | H Piekarz S Bart R Hackenburg A D Hancock E V Hungerford B Mayes K Sekharan |
| Institution: | University of Houston, Houston, TX 77004, USA Massachusetts Institute of Technology, Cambridge, MA 02139, USA Brookhaven National Laboratory, Upton, NY 11973, USA Carnegie Mellon University, Pittsburgh, PA 15213, USA V asar College, Poughkeepsie, NY 12601, USA |
| Abstract: | The hypernuclei Σ6H and Σ16C were observed by the (K−, π+) reaction on targets of 6Li and liquid O, respectively, at 713 MeV/c incident K− momentum. Structure is seen in Σ6H which may be interpreted in terms of particle-hole excitations similar to the previously observed states in Λ6Li. The inablitity to resolve individual Σ hypernuclear levels in Σ16C, due in part to the excitation of non-coherent states as a result of the large momentum transfer of about 130 MeV/c, precludes the extraction of the Σ-nucleus spin-orbit potential strength. The Σ-nucleus well depth appears to be 7 to 10 MeV less than that for the Λ. |
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