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Heavy-baryon properties with NLO accuracy in perturbative QCD

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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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Authors and Affiliations

  1. Institut für Physik der Johannes-Gutenberg-Universität, Staudinger Weg 7, 55099, Mainz, Germany

    S. Groote, J. G. Körner & A. A. Pivovarov

  2. Loodus- ja Tehnoloogiateaduskond, Tartu Ülikool, Tähe 4, 51010, Tartu, Estonia

    S. Groote

  3. Institute for Nuclear Research of the Russian Academy of Sciences, Moscow, 117312, Russia

    A. A. Pivovarov

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  1. S. Groote
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  2. J. G. Körner
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  3. A. A. Pivovarov
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Correspondence to S. Groote.

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Groote, S., Körner, J.G. & Pivovarov, A.A. Heavy-baryon properties with NLO accuracy in perturbative QCD. Eur. Phys. J. C 58, 355–382 (2008). https://doi.org/10.1140/epjc/s10052-008-0763-7

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