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Search for Violation of $CPT$ and Lorentz invariance in ${B_s^0}$ meson oscillations

Abstract : We present the first search for CPT-violating effects in the mixing of ${B_s^0}$ mesons using the full Run II data set with an integrated luminosity of 10.4 fb$^{-1}$ of proton-antiproton collisions collected using the D0 detector at the Fermilab Tevatron Collider. We measure the CPT-violating asymmetry in the decay $B_s^0 \to \mu^\pm D_s^\pm$ as a function of celestial direction and sidereal phase. We find no evidence for CPT-violating effects and place limits on the direction and magnitude of flavor-dependent CPT- and Lorentz-invariance violating coupling coefficients. We find 95\% confidence intervals of $\Delta a_{\perp} < 1.2 \times 10^{-12}$ GeV and $(-0.8 < \Delta a_T - 0.396 \Delta a_Z < 3.9) \times 10^{-13}$ GeV.
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http://hal.in2p3.fr/in2p3-01163573
Contributor : Sylvie Flores <>
Submitted on : Monday, June 15, 2015 - 8:09:14 AM
Last modification on : Wednesday, September 16, 2020 - 4:28:34 PM

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V.M. Abazov, U. Bassler, G. Bernardi, M. Besançon, D. Brown, et al.. Search for Violation of $CPT$ and Lorentz invariance in ${B_s^0}$ meson oscillations. Physical Review Letters, American Physical Society, 2015, 115, pp.161601. ⟨10.1103/PhysRevLett.115.161601⟩. ⟨in2p3-01163573⟩

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