Journal
PHYSICAL REVIEW C
Volume 74, Issue 2, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevC.74.024001
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In the interaction of two electric quadrupoles, there is at short range a contact term proportional to the second derivative of a delta function. This contact term contributes to the hyperfine splitting of bound states of two particles with spin one or higher - for example, the bound state of Omega(-) and a nucleus with spin one. The contact hyperfine splitting occurs in states with orbital angular momentum unity (P wave), in contrast to the Fermi contact interaction, which is in S states. We find that these contact splittings will be observable with Omega(-) atoms and help measure the quadrupole moment and charge radius of the hyperon.
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