KTeV Results: Re($ε' / ε$) and Rare Decay Results

Details KTeV Results: Re($ε' / ε$) and Rare Decay Results KTeV Results: Re($ε' / ε$) and Rare Decay Results

2002-09-30

arxiv.org/abs/hep-ex/0209083v1

Physics

High Energy Physics

High Energy Physics - Experiment

7 pages, 6 figures; proceedings of the XXXVII Recontres de Moriond on Electroweak Interactions and Unified Theories, Les Arcs,

Scientific paper

The KTeV physics program encompasses many goals including a precision measurement of the direct CP violation parameter Re($\epsilon' / \epsilon$) in $K \to \pi \pi$ decays, and studies of rare neutral kaon decays. The KTeV detector collected data during the Fermilab fixed-targed runs of 1996-97 and 1999. This article focuses on the precision measurement of the direct CP violation parameter Re($\epsilon' / \epsilon$) using the 1996-97 data set. In addition, measurements of the neutral kaon parameters $\tau_S$, $\Delta m$, $\phi_{+-}$, $\Delta \phi$ from that data set and a new measurement of the branching fraction of $K_L \to e^+ e^- \mu^+ \mu^-$ from the 1997 and 1999 data also are presented.

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