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Measurement of the B-0 -> K*(0) e(+) e(-) branching fraction at low dilepton mass

2013

The branching fraction of the rare decay B-0 -> K*(0) e(+) e(-) in the dilepton mass region from 30 to 1000 MeV/c(2) has been measured by the LHCb experiment, using pp collision data, corresponding to an integrated luminosity of 1.0 fb(-1), at a centre-of-mass energy of 7 TeV. The decay mode B-0 -> J/psi (e(+) e(-)) K*(0) is utilized as a normalization channel. The branching fraction B(B-0 -> K*(0) e(+) e(-)) is measured to be B(B-0 -> K*(0) e(+) e(-))(30-1000 MeV/c2) = (3.1(-0.8)(-0.3)(+0.9)(+0.2) +/- 0.2) x 10(-7) where the fi rst error is statistical, the second is systematic, and the third comes from the uncertainties on the B-0 -> J/K*(0) and J/psi -> e(+) e(-) branching fractions.

Nuclear and High Energy PhysicsParticle physicsB physicModels beyond the standard modelFlavour Changing Neutral CurrentsFOS: Physical sciencesHadrons01 natural sciencesDECAYSB physicsPartícules (Física nuclear)High Energy Physics - ExperimentSettore FIS/04 - Fisica Nucleare e SubnucleareNeutral currentHigh Energy Physics - Experiment (hep-ex)Neutral currents0103 physical sciencesLeptonic semileptonic and radiative decays of bottom meson[PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex]TOOLDECAYS; TOOL010306 general physicsLarge Hadron Collider (France and Switzerland)QCPhysicsFlavour Changing Neutral CurrentHadron-Hadron Scattering010308 nuclear & particles physicsBranching fractionB physics; Branching fraction; Flavour Changing Neutral Currents; Hadron-Hadron Scattering; Rare decayHigh Energy Physics::PhenomenologyGran Col·lisionador d'Hadrons3. Good healthCromodinàmica quànticaFIS/01 - FISICA SPERIMENTALERare decayB physics; Branching fraction; Flavour Changing Neutral Currents; Hadron-Hadron Scattering; Rare decay; Nuclear and High Energy PhysicsBottom mesons (|B|>0); Leptonic semileptonic and radiative decays of bottom mesons; Neutral currents; Models beyond the standard modelLeptonic semileptonic and radiative decays of bottom mesonsBottom mesons (|B|>0)Branching fractionHigh Energy Physics::ExperimentFísica nuclearDECAYParticle Physics - ExperimentQuantum chromodynamics
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