Search for Violations of Lorentz Invariance and CPT Symmetry in B (s)0 Mixing

(LHCb Collaboration)

Research output: Contribution to journalArticle

30 Scopus citations

Abstract

Violations of CPT symmetry and Lorentz invariance are searched for by studying interference effects in B0 mixing and in Bs0 mixing. Samples of B0→J/ψKS0 and Bs0→J/ψK+K- decays are recorded by the LHCb detector in proton-proton collisions at center-of-mass energies of 7 and 8 TeV, corresponding to an integrated luminosity of 3 fb-1. No periodic variations of the particle-antiparticle mass differences are found, consistent with Lorentz invariance and CPT symmetry. Results are expressed in terms of the standard model extension parameter Δaμ with precisions of O(10-15) and O(10-14) GeV for the B0 and Bs0 systems, respectively. With no assumption on Lorentz (non)invariance, the CPT-violating parameter z in the Bs0 system is measured for the first time and found to be Re(z)=-0.022±0.033±0.005 and Im(z)=0.004±0.011±0.002, where the first uncertainties are statistical and the second systematic.

Original languageEnglish (US)
Article number241601
JournalPhysical Review Letters
Volume116
Issue number24
DOIs
StatePublished - Jun 15 2016

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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