Tests of CPT symmetry in B0-B0bar mixing and in B0 to c cbar K0 decays
2017
Using the time dependences for the decays Y(4S) to B0B0bar to (ell^+- X)(c cbar K_S,L), we determine the three CPT-sensitive parameters Re (z) and Im (z) in B0-B0bar mixing and |Abar/A| in B0 to c cbar K0 decays. We find Im(z) = 0.010 +- 0.030 +- 0013, Re(z) = -0:065 +- 0.028 +- 0.014, and |Abar/A| = 0.999 +- 0.023 +- 0.017, in agreement with CPT symmetry. The Re(z) result provides a limit on one component of Lorentz-symmetry violation.
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