5 research outputs found
K pi vector form factor constrained by tau ---> K pi nu_tau and K_l3 decays
Dispersive representations of the Kpi vector and scalar form factors are used
to fit the spectrum of tau ---> K pi nu_tau obtained by the Belle collaboration
incorporating constraints from results for K_l3 decays. The slope and curvature
of the vector form factor are obtained directly from the data through the use
of a three-times-subtracted dispersion relation. We find and . From
the pole position on the second Riemann sheet the mass and width of the
are found to be ~MeV and
~MeV. The phase-space integrals needed for
K_l3 decays are calculated as well. Furthermore, the Kpi isospin-1/2 P-wave
threshold parameters are derived from the phase of the vector form factor. For
the scattering length and the effective range we find respectively
and .Comment: 22 pages, 4 figure
Species diversification â which species should we use?
Large detector systems for particle and astroparticle physics; Particle tracking detectors; Gaseous detectors; Calorimeters; Cherenkov detectors; Particle identification methods; Photon detectors for UV. visible and IR photons; Detector alignment and calibration methods; Detector cooling and thermo-stabilization; Detector design and construction technologies and materials. The LHCb experiment is dedicated to precision measurements of CP violation and rare decays of B hadrons at the Large Hadron Collider (LHC) at CERN (Geneva). The initial configuration and expected performance of the detector and associated systems. as established by test beam measurements and simulation studies. is described. © 2008 IOP Publishing Ltd and SISSA