Search results for "converted photons"

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Study of radiative bottomonium transitions using converted photons

2011

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.

Nuclear and High Energy PhysicsParticle physicsMesonElectron–positron annihilationHadronbottomoniumFOS: Physical sciences01 natural sciencesHigh Energy Physics - ExperimentNuclear physicsHigh Energy Physics - Experiment (hep-ex)Particle decayBaBar detector at SLAC; radiative bottomonium transitions0103 physical sciences[PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex]Radiative transfer010306 general physicsPACS: 13.20.Gd 14.40.PqPhysics010308 nuclear & particles physicsBranching fractionParticle physicsQuarkoniumHEPconverted photons3. Good healthbottomonium; converted photonsPair productionradiative bottomonium transitionsBaBarBaBar detector at SLACFísica de partículesExperimentsPhysical Review D
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