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.
|Number of pages||5|
|Journal||Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics|
|State||Published - 15 Apr 1982|
Bibliographical noteFunding Information:
Bertlm et al. \[1\] have recently reported the observation of structure m the (K-, 7r-) reaction on 9Be near the ~ threshold. This spectrum may be interpreted as extubltmg two narrow states of width smaller than 8 MeV. The possibdlty of narrow Z-hypernu-clear states has led to renewed theoretical interest m the structure and width of such levels, with the hope of obtaining hyperon-nuclear potential reformation simdar to that extracted from the now well studied A-hypernuclel \[2-6\].I n order to verify and expand the knowledge of 1C hypernuclel the Brookhaven hypernu- ¢~ Research supported by the US DOE under Contracts DE AS05-76ERO-3948, DE-AC02-76CHO-0016, DEAC02-76ERO-3244, and ED-AC02-77ERO-4195.