| Issue |
EPJ Web of Conferences
Volume 3, 2010
19th International IUPAP Conference on Few-Body Problems in Physics
|
|
|---|---|---|
| Article Number | 07011 | |
| Number of page(s) | 5 | |
| Section | Strange and exotic systems | |
| DOI | https://doi.org/10.1051/epjconf/20100307011 | |
| Published online | 12 April 2010 | |
https://doi.org/10.1051/epjconf/20100307011
Mass splitting of heavy-baryons from QCD sum rules
1
Instituto de Física, Universidade de Sāo Paulo,
C.P. 66318,
05389-970
Sao Paulo, SP, Brazil
2
Laboratoire de Physique Théorique et Astroparticules,
CNRS-IN2P3 & Université de Montpellier II,
Case 070, Place Eugène
Bataillon, 34095 - Montpellier
Cedex 05,
France.
a e-mail: rma@if.usp.br
b e-mail: snarison@yahoo.fr
c e-mail: mnielsen@if.usp.br
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 .
© Owned by the authors, published by EDP Sciences, 2010
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