
Accession Number : AD0613223
Title : BINDING ENERGY OF A LAMBDAPARTICLE IN NUCLEAR MATTER AND THE LAMBDANUCLEON INTERACTION,
Corporate Author : COLORADO UNIV BOULDER
Personal Author(s) : Downs,B. W. ; Ware,W. E.
Report Date : 16 AUG 1963
Pagination or Media Count : 9
Abstract : The binding energy D of a lambdaparticle in nuclear matter is calculated with the independentpair approximation for seven central twobody lambdanucleon potentials. These potentials are consistent with the binding energy of lambda He5 and therefore represent the spinaveraged lambdanucleon interaction in S states; they have hard cores of radius 0.4 F or 0.6 F and twoparameter attractive wells with ranges suggested by consideration of the twopionexchange mechanism. A simple approximation to the BetheGoldstone function is suggested; its use permits D and the partialwave contributions to D to be evaluated easily. When the Swave lambdanucleon potentials are assumed to be appropriate to all angular momentum states, the calculated values of D, corresponding to a nucleon density equal to the central density in heavy nuclei, are consistent with empirical estimates in the range 3040 MeV for most of the potentials considered. If the correct value of D is close to 30 MeV, some reduction in the strength of the longer ranged potentials may be required in oddparity states (at least in P states) to bring about agreement; for the shorter ranged potentials considered, no such reduction would be required. If the correct value of D is close to 40 MeV, oddparity suppression would not be indicated even for the longer ranged potentials. The first three partialwave contributions to D, as well as D itself, are given for each potential, and the dependence of these on the hardcore radius and on the shape and range of the attractive well is discussed. (Author)
Descriptors : (*HYPERONS, NUCLEAR BINDING ENERGY), (*NUCLEONS, HYPERONS), (*NUCLEAR BINDING ENERGY, HYPERONS), NUCLEAR MODELS, PARITY
Distribution Statement : APPROVED FOR PUBLIC RELEASE