Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2008-05-05
Phys.Rev.D77:094002,2008
Physics
High Energy Physics
High Energy Physics - Phenomenology
RevTeX4, 8 pages with 14 eps figures
Scientific paper
10.1103/PhysRevD.77.094002
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.
Huang Ming-Qiu
Zhang Jian-Rong
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