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Test of CPT and Lorentz symmetry in entangled neutral kaons with the KLOE experiment
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2014 (English)In: Physics Letters B, ISSN 0370-2693, Vol. 730, 89-94 p.Article in journal (Refereed) Published
Abstract [en]

Neutral kaon pairs produced in phi decays in anti-symmetric entangled state can be exploited to search for violation of CPT symmetry and Lorentz invariance. We present an analysis of the CP-violating process phi -> KSKL -> pi(+)pi(-)pi(+)pi(-) based on 1.7 fb(-1) of data collected by the KLOE experiment at the Frascati phi-factory DA Phi NE. The data are used to perform a Measurement of the CPT-violating parameters Delta a(mu) for neutral kaons in the context of the Standard Model Extension framework. The parameters measured in the reference frame of the fixed stars are: Delta a(0) = (-6.0 +/- 7.7(stat)+/- 3.1(syst)) X 10(-18) GeV, Delta a(x) = (0.9 +/- 1.5(stat)+/- 0.6(syst)) X 10(-18) GeV, Delta a(y) = (-2.0 +/- 1.5(stat)+/- 0.5(syst)) X 10(-18) GeV, Delta a(z) = (3.1 +/- 1.7(stat)+/- 0.5(syst)) X 10(-18) GeV. These are presently the most precise measurements in the quark sector of the Standard Model Extension. (C) 2014 The Authors. Published by Elsevier B.V.

Place, publisher, year, edition, pages
2014. Vol. 730, 89-94 p.
Keyword [en]
CPT symmetry, Lorentz symmetry, Neutral kaons, phi-Factory
National Category
Physical Sciences
URN: urn:nbn:se:uu:diva-224471DOI: 10.1016/j.physletb.2014.01.026ISI: 000333506400017OAI: oai:DiVA.org:uu-224471DiVA: diva2:717418
Available from: 2014-05-15 Created: 2014-05-13 Last updated: 2014-05-15Bibliographically approved

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Balkestahl, L. CaldeiraHeijkenskjold, LenaHöistad, BoJacewicz, MarekJohansson, TordKupsc, AndrzejWolke, Magnus
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