TY - JOUR
T1 - Physics of γ resonances
T2 - Ten years later
AU - Voloshin, M. B.
AU - Zaĭtsev, Yu M.
PY - 1987/7/31
Y1 - 1987/7/31
N2 - This paper the present status of the physics of bottomonium: a bound system consisting of a heavy b quark and the antiquark b. The basic experimental data on the levels of bottomonium are presented. Theoretical methods for describing the properties of these levels are discussed. Questions pertaining to the spectroscopy of bottomonium, including the fine and hyperfine splittings, radiative transitions between levels, and annihilation decays of the bb system, are discussed. Effects which are not describable by quantum-chromodynamics perturbation theory are taken into account. Transitions between bottomonium levels involving the emission of light muons are discussed. The possibilities of a search for hypothetical new particles and effects in the decays of γ resonances are also discussed.
AB - This paper the present status of the physics of bottomonium: a bound system consisting of a heavy b quark and the antiquark b. The basic experimental data on the levels of bottomonium are presented. Theoretical methods for describing the properties of these levels are discussed. Questions pertaining to the spectroscopy of bottomonium, including the fine and hyperfine splittings, radiative transitions between levels, and annihilation decays of the bb system, are discussed. Effects which are not describable by quantum-chromodynamics perturbation theory are taken into account. Transitions between bottomonium levels involving the emission of light muons are discussed. The possibilities of a search for hypothetical new particles and effects in the decays of γ resonances are also discussed.
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U2 - 10.1070/PU1987v030n07ABEH002924
DO - 10.1070/PU1987v030n07ABEH002924
M3 - Article
AN - SCOPUS:84927810927
SN - 0038-5670
VL - 30
SP - 553
EP - 574
JO - Soviet Physics - Uspekhi
JF - Soviet Physics - Uspekhi
IS - 7
ER -