Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2004-06-22
Phys.Lett. B602 (2004) 185-196
Physics
High Energy Physics
High Energy Physics - Phenomenology
19 pages, 8 figures, replaced version accepted for publication in Phys. Lett. B
Scientific paper
10.1016/j.physletb.2004.09.072
In a diquark-diquark-antiquark picture of pentaquarks, we use two interpolating currents to calculate the mass of the recently measured $\Xi^{--}$ state in the framework of QCD sum rules. We show that, even though yielding similar values for $m_{\Xi^{--}}$ (and close to the experimental value), these currents differ from each other in what concerns the strength of the pole, convergence of the OPE and sensitivity to the continuum threshold parameter.
da Silva Romulo Rodrigues
Matheus Ricardo D.
Navarra Fernando S.
Nielsen Mikkel
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