Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2006-11-24
Phys.Lett.B660:539-544,2008
Physics
High Energy Physics
High Energy Physics - Phenomenology
Updated section on doubly strange diquarks
Scientific paper
10.1016/j.physletb.2008.01.023
The recent measurement by CDF M(Sigma_b)-M(Lambda_b)=192 MeV is in striking agreement with our theoretical prediction M(Sigma_b)-M(Lambda_b) = 194 MeV. In addition, the measured splitting M(Sigma_b*)-M(Sigma_b) = 21 MeV agrees well with the predicted splitting of 22 MeV. We point out the connection between these predictions and an effective supersymmetry between mesons and baryons related by replacing a light antiquark by a light diquark. We discuss the theoretical framework behind these predictions and use it to provide additional predictions for the masses of spin-1/2 and spin-3/2 baryons containing heavy quarks, as well as magnetic moments of Lambda_b and Lambda_c.
Karliner Marek
Lipkin Harry J.
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