KTeV Results: Re(ǫ ′ /ǫ) and Rare Decay Results
نویسنده
چکیده
The KTeV physics program encompasses many goals including a precision measurement of the direct CP violation parameter Re(ǫ ′ /ǫ) in KS,L → ππ 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(ǫ ′ /ǫ) using the 1996-97 data set. In addition, measurements of the neutral kaon parameters τs, ∆m, φ+−, ∆φ from that data set and a new measurement of the branching fraction of KL → e + e − µ + µ − from the 1997 and 1999 data also are presented.
منابع مشابه
Status of the KTeV Experiment at Fermilab
The primary goal of the KTeV experiment is the search for direct CP violation in the neutral kaon system. It is believed that CP is violated through two different processes. The first process has been observed and has been termed indirect CP violation. It is the result of mixing in the mass matrix through K − K mixing. The second process, called direct CP violation, occurs in the decay amplitud...
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We have compared the decay rates of KL and KS to π π and ππ final states using a subset of the data from the KTeV experiment (E832) at Fermilab. We find that the direct-CP -violation parameter Re(ǫ/ǫ) is equal to (28.0± 3.0 (stat)± 2.8 (syst))× 10. This result definitively establishes the existence of CP violation in a decay process. Typeset using REVTEX
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تاریخ انتشار 2002