Search results for "decadimenti radiativi"

showing 2 items of 2 documents

Measurement of the radiative K-e3 branching ratio

2005

We present a measurement of the relative branching ratio of the decay KL -> pi e nu gamma (Ke3gamma) with respect to KL-> pi e nu (gamma) (Ke3+Ke3gamma) decay. The result is based on observation of 19 000 Ke3gamma and 5.6 x 10^6 Ke3 decays. The value of the branching ratio is Br(Ke3gamma, Egamma^*>30 MeV,theta(e,gamma)^*>20^o)/Br(Ke3)= (0.964+-0.008+0.011-0.009)%. This result agrees with theoretical predictions but is at variance with a recently published result.

Nuclear and High Energy PhysicsChiral perturbation theoryPhotonHadronFOS: Physical scienceskaon decay; NEUTRAL KAON; branching ratio7. Clean energy01 natural sciencesNEUTRAL KAONHigh Energy Physics - ExperimentNuclear physicsmesoni KHigh Energy Physics - Experiment (hep-ex)0103 physical sciencesRadiative transfer[PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex]radiative kaon decays010306 general physicsmesoni K; decadimenti radiativiPhysics010308 nuclear & particles physicsBranching fractionK13 DECAYSBremsstrahlungkaon decayAmplitudedecadimenti radiativibranching ratioAtomic physicsParticle Physics - Experiment
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Measurement of the Ξ0→Λγ decay asymmetry and branching fraction

2004

In data taken with the NA48 experiment at the CERN SPS in 1999, 730 candidates of the weak radiative hyperon decay Ξ0→Λγ have been found with an estimated background of 58±8 events. From these events the Ξ0→Λγ decay asymmetry has been determined to α(Ξ0→Λγ)=-0.78±0.18stat±0.06 syst, which is the first evidence of a decay asymmetry in Ξ 0→Λγ. The branching fraction of the decay has been measured to be Br(Ξ0→Λγ)=(1.16±0.05 stat±0.06syst)×10-3. © 2004 Elsevier B.V. All rights reserved.

PhysicsParticle physicsNuclear and High Energy PhysicsLarge Hadron ColliderBranching fractionmedia_common.quotation_subjectiperoni Xi0HyperonRadiative decayNA48 experimentAsymmetryNuclear physicsdecadimenti radiativiRadiative transferiperoni Xi0; decadimenti radiativimedia_commonPhysics Letters B
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