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arXiv · 0711.2713

Search for CPT and Lorentz Violation in B0-B0bar Oscillations with Dilepton Events

The BABAR Collaboration·B. Aubert
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Abstract

We report results of a search for CPT and Lorentz violation in B0-B0bar oscillations using inclusive dilepton events from 232 million Y(4S) --> BBbar decays recorded by the BABAR detector at the PEP-II B Factory at SLAC. We find 2.8sigma significance, compatible with no signal, for variations in the complex CPT violation parameter z at the Earth's sidereal frequency and extract values for the quantities Δ(a_μ) in the general Lorentz-violating standard-model extension. The spectral powers for variations in z over the frequency range 0.26/year to 2.1/day are also compatible with no signal.

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The BABAR Collaboration, B. Aubert. 2007-11-17. Search for CPT and Lorentz Violation in B0-B0bar Oscillations with Dilepton Events. https://doi.org/10.1103/physrevlett.100.131802

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