0000000001131400

AUTHOR

L. Heijkenskj

showing 1 related works from this author

Limit on the production of a light vector gauge boson in $\phi $ mesondecays with the KLOE detector

2012

We present a new limit on the production of a light dark-force mediator with the KLOE detector at DAPHNE. This boson, called U, has been searched for in the decay phi --> eta U, U --> e+ e-, analyzing the decay eta --> pi0 pi0 pi0 in a data sample of 1.7 fb-1. No structures are observed in the e+e- invariant mass distribution over the background. This search is combined with a previous result obtained from the decay eta --> pi+ pi- pi0, increasing the sensitivity. We set an upper limit at 90% C.L. on the ratio between the U boson coupling constant and the fine structure constant of alpha'/alpha < 1.7x10^-5 for 30<M_U<400 MeV and alpha'/alpha < 8x10^-6 for the sub-region 50<M_U<210 MeV. This…

Dark forcesNuclear and High Energy PhysicsParticle physicsElectron–positron annihilationFOS: Physical sciences01 natural sciencesSettore FIS/04 - Fisica Nucleare e Subnuclearee(+)e(-) Collisions Dark forces Gauge vector bosonHigh Energy Physics - ExperimentNuclear physicsHigh Energy Physics - Experiment (hep-ex)e(+)e(-) Collisions0103 physical sciencesgauge vector bosonInvariant massNuclear Experiment010306 general physicsBosonPhysicsCoupling constantGauge boson$e^{+}e^{-}$ collisions010308 nuclear & particles physicsSettore FIS/01 - Fisica SperimentaleForm factor (quantum field theory)Vector meson dominancePhi mesondark forcesHigh Energy Physics::ExperimentGauge vector boson
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