Mass spectra of the heavy baryons Lambda_Q and Sigma_Q^(*) from QCD sum rules
High Energy Physics - Phenomenology
2008-11-26 v1
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.
Keywords
Cite
@article{arxiv.0805.0479,
title = {Mass spectra of the heavy baryons Lambda_Q and Sigma_Q^(*) from QCD sum rules},
author = {Jian-Rong Zhang and Ming-Qiu Huang},
journal= {arXiv preprint arXiv:0805.0479},
year = {2008}
}
Comments
RevTeX4, 8 pages with 14 eps figures