Mass splitting of heavy-baryons from QCD sum rules

Publisher： Edp Sciences

E-ISSN： 2100-014x|3|issue|07011-07011

ISSN： 2100-014x

Source： EPJ Web of Conference, Vol.3, Iss.issue, 2010-04, pp. : 07011-07011

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Abstract

We extract the heavy-baryons mass-splittings due to S U (3) breaking using double ratios of QCD sum rules. We evaluate the masses of the strange-heavy baryons ΞQ , Ξ*Q , ΩQ and Ω*Q using as input the masses of the associated non-strange ΛQ , ΣQ and Σ*Q baryons. We notice that the leading term controlling the mass-splittings is the ratio of the quark condensate and not the running mass ms . We also predict the hyperfine splittings Ω*Q − ΩQ and Ξ*Q − ΞQ .

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