TY - JOUR
T1 - Fine and hyperfine splittings of charmonium and bottomonium
T2 - An improved perturbative QCD approach
AU - Recksiegel, S.
AU - Sumino, Y.
PY - 2004/1/8
Y1 - 2004/1/8
N2 - We extend the formalism based on perturbative QCD that was developed in our previous work, and compute the hyperfine splittings of the bottomonium spectrum as well as the fine and hyperfine splittings of the charmonium spectrum. All the corrections up to O(αS5m) are included in the computations. We find agreement (with respect to theoretical uncertainties) with the experimental values whenever available and give predictions for not yet observed splittings.
AB - We extend the formalism based on perturbative QCD that was developed in our previous work, and compute the hyperfine splittings of the bottomonium spectrum as well as the fine and hyperfine splittings of the charmonium spectrum. All the corrections up to O(αS5m) are included in the computations. We find agreement (with respect to theoretical uncertainties) with the experimental values whenever available and give predictions for not yet observed splittings.
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U2 - 10.1016/j.physletb.2003.10.070
DO - 10.1016/j.physletb.2003.10.070
M3 - Article
AN - SCOPUS:0348046393
SN - 0370-2693
VL - 578
SP - 369
EP - 375
JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
IS - 3-4
ER -