Study of radiative bottomonium transitions using converted photons

Details Study of radiative bottomonium transitions using converted photons Study of radiative bottomonium transitions using converted photons

2011-04-27

arxiv.org/abs/1104.5254v2

Phys. Rev. D 84, 072002 (2011)

Physics

High Energy Physics

High Energy Physics - Experiment

19 pages, 8 figures, published by Phys. Rev. D

Scientific paper

10.1103/PhysRevD.84.072002

We use 111+/-1 million Upsilon(3S) and 89+/-1 million Upsilon(2S) events recorded by the BaBar detector at the PEP-II B-factory at SLAC to perform a study of radiative transitions between bottomonium states using photons that have been converted to e+e- pairs by the detector material. We observe Upsilon(3S) -> gamma chi_b0,2(1P) decay, make precise measurements of the branching fractions for chi_b1,2(1P,2P) -> gamma Upsilon(1S) and chi_b1,2(2P) -> gamma Upsilon(2S) decays, and search for radiative decay to the eta_b(1S) and eta_b(2S) states.

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