Quadrupolar contact terms and hyperfine structure
Feb, 2006
19 pages
Published in:
- Phys.Rev.C 74 (2006) 024001,
- Phys.Rev.C 77 (2008) 039901 (erratum)
e-Print:
- hep-ph/0602105 [hep-ph]
Citations per year
Abstract: (arXiv)
In the interaction of two electric quadrupoles, there is at short distances 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 states of Omega minus and a nucleus of spin one.The contact hyperfine splitting occurs in states with orbital angular momentum one(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 minus atoms and help measure the quadrupole moment and charge radius of the hyperon.Note:
- 19 pages; two sentences deleted from first version
- 13.40.Em
- 25.80.Pw
- 32.10.Fn
- 41.20.-q
- hyperon nucleus: bound state
- atom: exotic
- Omega-: hyperonic atom
- energy levels: hyperfine structure
- angular momentum: 1
- electromagnetic interaction
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