A determination of the CPT violation parameter Re( δ)from the semileptonic decay of strangeness-tagged neutral kaons
We have improved by two orders of magnitude the limit currently available for the CPT violation parameter Re( δ). To this purpose we have analyzed the full sample of neutral-kaon decays to e πν recorded in the CPLEAR experiment, where the strangeness of the neutral kaons was tagged at production and...
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Published in | Physics letters. B Vol. 444; no. 1; pp. 52 - 60 |
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Main Authors | , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , |
Format | Journal Article |
Language | English |
Published |
Elsevier B.V
17.12.1998
Elsevier |
Subjects | |
Online Access | Get full text |
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Summary: | We have improved by two orders of magnitude the limit currently available for the CPT violation parameter Re(
δ). To this purpose we have analyzed the full sample of neutral-kaon decays to e
πν recorded in the CPLEAR experiment, where the strangeness of the neutral kaons was tagged at production and decay time. An appropriate function of the measured decay rates, including information from the analysis of π
+π
− decay channel, gives directly Re(
δ). The result Re(
δ)=(3.0±3.3
stat±0.6
syst)×10
−4 is compatible with zero. Values for the parameters Im(
δ), Re(
x
−) and Im(
x
+) were also obtained. |
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ISSN: | 0370-2693 1873-2445 |
DOI: | 10.1016/S0370-2693(98)01357-4 |