Measurement of the Absolute Branching Ratio for the K+ -> mu+ nu(gamma) Decay with the KLOE Detector

Abstract

We have measured the fully inclusive K+ -> mu+nu(gamma) absolute branching ratio with the KLOE experiment at DAFNE, the Frascati Phi-factory. From some 865,283 K+ -> mu+nu(gamma) decays obtained from a sample of about 5.2x10^8 Phi-meson decays, we find BR(K+ -> mu+ nu (gamma)) = 0.6366 +-0.0009(stat.) +-0.0015(syst.), corresponding to an overall fractional error of 0.27%. Using recent lattice results on the decay constants of pseudoscalar mesons one can obtain an estimate for the CKM mixing matrix element |Vus|=0.2223+-0.0026.

arXiv commentCorrected typos

References in corpus (6)

• Big Bang Nucleosynthesis (in "The Review of Particle Properties" 2004)
• Light pseudoscalar decay constants, quark masses, and low energy constants from three-flavor lattice QCD
• Precision Measurements and CKM Unitarity
• Precise Determination of |V{us}| from Lattice Calculations of Pseudoscalar Decay Constants
• The K -> pi vector form factor at zero momentum transfer on the lattice
• Data handling, reconstruction, and simulation for the KLOE experiment

Cited by in corpus (28)

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• An evaluation of |Vus| and precise tests of the Standard Model from world data on leptonic and semileptonic kaon decays
• Flavor Physics in the Quark Sector
• Hints of large tan(beta) in flavour physics
• Modern and Future Colliders
• QED Corrections to Hadronic Processes in Lattice QCD
• Scalar K pi form factor and light quark masses
• Constraints on New Neutrino Interactions via Light Abelian Vector Bosons
• Scrutinizing CKM unitarity with a new measurement of the $K_{\mu 3}/K_{\mu 2}$ branching fraction
• Anomalies in Particle Physics
• Lattice QCD calculation of the electroweak box diagrams for the kaon semileptonic decays
• Unparticles at heavy flavour scales: CP violating phenomena
• Light charged Higgs at the beginning of the LHC era
• Flavor Physics and CP Violation
• Precision Measurement of KS Meson Lifetime with the KLOE detector
• The Physics of DAFNE and KLOE
• A Detailed Analysis of Flavour-changing Decays of Top Quarks as a Probe of New Physics at the LHC
• Testing Times for Supersymmetry: Looking Under the Lamp Post
• Nuclear charge radius of ${}^{26m}$Al and its implication for V${}_{ud}$ in the quark-mixing matrix
• Measurement of the absolute branching ratio of the K+ -> pi+ pi0 (gamma) decay with the KLOE detector
• Nelson-Barr ultralight dark matter
• Measurement of the absolute branching ratios for semileptonic K+/- decays with the KLOE detector
• Vus and lepton universality from kaon decays with the KLOE detector
• Precision test of the SM with Kl2 and Kl3 decays at KLOE
• Global Determination of $|V_{us}|$