Heavy-baryon properties with NLO accuracy in perturbative QCD |
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| Authors: | S Groote J G Körner A A Pivovarov |
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| Institution: | 1.Institut für Physik der Johannes-Gutenberg-Universit?t,Mainz,Germany;2.Loodus- ja Tehnoloogiateaduskond,Tartu ülikool,Tartu,Estonia;3.Institute for Nuclear Research of the Russian Academy of Sciences,Moscow,Russia |
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| Abstract: | We present an analysis of the static properties of heavy baryons at next-to-leading order in the perturbative expansion of
QCD. We obtain analytical next-to-leading order three-loop results for the two-point correlators of baryonic currents with
one finite-mass quark field for a variety of quantum numbers of the baryonic currents. We consider both the massless limit
and the HQET limit of the correlator as special cases of the general finite-mass formula and find agreement with previous
results. We present closed-form expressions for the moments of the spectral density. We determine the residues of physical
baryon states using sum-rule techniques. |
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