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arXiv · 0805.0479

Mass spectra of the heavy baryons Lambda_Q and Sigma_Q^(*) from QCD sum rules

Jian-Rong Zhang·Ming-Qiu Huang
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Abstract

We use QCD sum rule approach to calculate the masses of the ground-state Lambda_Q and Sigma_Q^(*) baryons. Contributions of the operators up to dimension six are included in operator product expansion. The resulting heavy baryonic masses from the calculations are m_{Lambda_b}=5.69 +/- 0.13 GeV, and m_{Lambda_c}=2.31 +/- 0.19 GeV for Lambda_Q; m_{Sigma_b}=5.73 +/- 0.21 GeV, m_{Sigma_b^*}=5.81 +/- 0.19 GeV, m_{Sigma_c}=2.40 +/- 0.31 GeV and m_{Sigma_c^*}=2.56 +/- 0.24 GeV for Sigma_Q^(*), respectively, which are in good agreement with the experimental values.

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Jian-Rong Zhang, Ming-Qiu Huang. 2008-05-05. Mass spectra of the heavy baryons Lambda_Q and Sigma_Q^(*) from QCD sum rules. https://doi.org/10.1103/physrevd.77.094002

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