https://doi.org/10.1140/epjc/s10052-008-0763-7
Regular Article - Theoretical Physics
Heavy-baryon properties with NLO accuracy in perturbative QCD
1
Institut für Physik der Johannes-Gutenberg-Universität, Staudinger Weg 7, 55099, Mainz, Germany
2
Loodus- ja Tehnoloogiateaduskond, Tartu Ülikool, Tähe 4, 51010, Tartu, Estonia
3
Institute for Nuclear Research of the Russian Academy of Sciences, Moscow, 117312, Russia
* e-mail: groote@thep.physik.uni-mainz.de
Received:
22
July
2008
Published online:
30
October
2008
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.
© Springer-Verlag , 2008
