A New Measurement of the Radiative Ke3 Branching Ratio and Photon Spectrum
Douglas R Bergman (for the KTeV Collaboration, Rutgers University)
TL;DR
This paper reports a new measurement of the radiative Ke3 decay branching ratio and photon spectrum, providing insights into the decay process and photon emission mechanisms.
Contribution
It introduces the first study of the photon spectrum in radiative Ke3 decay and presents a precise measurement of the branching ratio.
Findings
Branching ratio BR(Ke3g)/BR(Ke3) = 0.911% with uncertainties
Photon spectrum consistent with inner bremsstrahlung at 2 sigma level
Provides new data for understanding radiative kaon decays
Abstract
We present a preliminary report on a new measurement of the radiative neutral Ke3 branching ratio and the first study of the photon spectrum in this decay. We find BR(Ke3g, E*_g>30 GeV, Th*_eg>20 deg)/BR(Ke3) = 0.911+-0.009(stat)+0.021-0.010(syst)%. Our measurement of the spectrum is consistent with inner bremsstrahlung only as the source of photons at the 2 sigma level.
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Taxonomy
TopicsAtmospheric and Environmental Gas Dynamics · Spectroscopy and Laser Applications · Atmospheric Ozone and Climate