Great strides have been made in the understanding of bound states of the bottom quark, b, and its antiquark,b-bar , since the discovery of the first Ψ resonances in 1977. These bound states, known as bottomonium, have a rich spectrum whose masses and transition amplitudes shed valuable light on the strong interactions. We review some recent developments in bottomonium physics, including the discovery of the spin-singlet states eta_b(1S,2S) and h_b(1P,2P), the first D-wave states, one or more candidates for spin-triplet chi_b(3P) excitations, and above-threshold states with strong transitions to states below threshold. We also present information about transitions, production, and signatures of new physics.
Recent Results in Bottomonium
PATRIGNANI, CLAUDIA;
2013-01-01
Abstract
Great strides have been made in the understanding of bound states of the bottom quark, b, and its antiquark,b-bar , since the discovery of the first Ψ resonances in 1977. These bound states, known as bottomonium, have a rich spectrum whose masses and transition amplitudes shed valuable light on the strong interactions. We review some recent developments in bottomonium physics, including the discovery of the spin-singlet states eta_b(1S,2S) and h_b(1P,2P), the first D-wave states, one or more candidates for spin-triplet chi_b(3P) excitations, and above-threshold states with strong transitions to states below threshold. We also present information about transitions, production, and signatures of new physics.
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