Recent Results from Ktev

  • Published 2001


equals 2R(ε−Y −X−), where ε is the familiar indirect CP violation parameter, Y parameterizes CPT violation in ∆S = ∆Q amplitudes and X− parameterizes CPT violation in ∆S = −∆Q amplitudes 1. A comparison of the real part of ε as measured in K → ππ decays with δL can reveal new, CPT violating processes. The PDG 2000 average for e and μ is δL = (3.27 ± 0.12) × 10 −3; the best e result 2 is (3.41± 0.18)× 10−3, obtained from a dataset of 34× 106 events. Here we present a result based on about 300× 106 events. Building a detector with the same efficiencies for both charge combinations at the required level is approximately impossible. Instead, we begin by defining subsamples with nearly cancelling efficiencies. So for example we compare the number of e+ events measured when the spectrometer magnet was set to positive polarity to the number of e events with negative magnet polarity. Then,

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Cite this paper

@inproceedings{2001RecentRF, title={Recent Results from Ktev}, author={}, year={2001} }