Search results for "Decays of taus"

showing 3 items of 3 documents

Study of high-multiplicity three-prong and five-prong τ decays at BABAR

2012

We present measurements of the branching fractions of three-prong and five-prong tau decay modes using a sample of 430 million tau lepton pairs, corresponding to an integrated luminosity of 468 fb(-1), collected with the BABAR detector at the PEP-II asymmetric-energy e_e storage rings at SLAC National Accelerator Laboratory. The tau(-) -> (3 pi)(-) eta nu(tau), tau(-) -> (3 pi)(-) omega nu(tau), and tau(-) f(1) (1285)nu(tau) branching fractions are presented, as well as a new limit on the branching fraction of the second-class current decay tau(-) -> pi(-) eta'(958)nu(tau). We search for the decay mode tau(-) -> K- eta'(958)nu(tau) and for five-prong decay modes with kaons, and place the fi…

Decays of taus; TausNuclear and High Energy PhysicsParticle physicsElectron–positron annihilationDecays of tausPACS: 13.35.Dx 14.60.FgHigh multiplicity01 natural sciencesTausNuclear physics0103 physical sciences[PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex]Decays of tau010306 general physicsCurrent decayPhysics010308 nuclear & particles physicsBranching fractionLeptons (Física nuclear)Particle physicsHEPLeptons (Nuclear physics)BaBarHigh Energy Physics::ExperimentExperimentsFísica de partículesLepton
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Spectral distribution for the decay τ→ντKπ

2006

Abstract With the newly available data sets on hadronic τ decays from the B -factories BaBar and BELLE, and future data from BESIII, precise information on the decay distributions will soon become available. This calls for an improvement of the decay spectra also on the theoretical side. In this work, the distribution function for the decay τ → ν τ K π will be presented with the relevant Kπ vector and scalar form factors being calculated in the framework of the resonance chiral theory, also taking into account additional constraints from dispersion relations and short-distances. As a by-product the slope and curvature of the vector form factor F + K π ( s ) are determined to be λ + ′ = 25.6…

PhysicsNuclear and High Energy PhysicsParticle physicsBranching fractionPartial wave analysisHadronScalar (mathematics)ResonanceDecays of tausNuclear physicsDistribution functionDispersion relationHigh Energy Physics::ExperimentB mesonChiral symmetriesDispersion relationsPhysics Letters B
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What can be learned from the Belle spectrum for the decay τ−→ντKSπ−

2008

Abstract A theoretical description of the differential decay spectrum for the decay τ − → ν τ K S π − , which is based on the contributing Kπ vector and scalar form factors F + K π ( s ) and F 0 K π ( s ) being calculated in the framework of resonance chiral theory (R χ T), additionally imposing constraints from dispersion relations as well as short distance QCD, provides a good representation of a recent measurement of the spectrum by the Belle Collaboration. Our fit allows to deduce the total branching fraction B [ τ − → ν τ K S π − ] = 0.427 ± 0.024 % by integrating the spectrum, as well as the K ∗ resonance parameters M K ∗ = 895.3 ± 0.2 MeV and Γ K ∗ = 47.5 ± 0.4 MeV , where the last t…

PhysicsQuantum chromodynamicsNuclear and High Energy PhysicsBranching fractionDispersion relationQuantum mechanicsScalar (mathematics)Decays of tausAtomic physicsCurvatureChiral symmetriesDispersion relationsShort distancePhysics Letters B
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