T Violation and CPT Tests in Neutral-Meson Systems

Abstract

The review covers transitions between M0 and M0bar in all four systems M0 = K0, D0, B0 and Bs. These systems are ideal laboratories for studying the discrete symmetries T and CPT. The properties of time reversal T are discussed in classical and quantum mechanics. T violation in K0 K0bar transitions has been observed in 1970 independent of assuming CPT symmetry by using the Bell-steinberger unitarity relation. Improvements of this observation are reviewed including the latest results in 2013. They show with high significance that CP violation in K0 K0bar transitions is only T violation without any CPT violation. Transitions in the other three systems do not show CP violation so far and therefore neither T nor CPT violation. The large observed CP violation in B0 -> J/psi K0 decays is presented to be compatible with only T and no CPT violation, the same for the very small but significant CP violation in decays K0 -> pi pi with isospin 2.

arXiv comment49 pages, 13 figures

References in corpus (33)

• Gravity, Lorentz Violation, and the Standard Model
• Observation of Large CP Violation in the Neutral B Meson System
• Observation of CP violation in the B^0 meson system
• Theoretical update of Bs-Bs-bar mixing
• Evidence for D0-anti-D0 Mixing
• A precision measurement of direct CP violation in the decay of neutral kaons into two pions
• Measurement of the Bs-Bsbar Oscillation Frequency
• Precise Measurements of Direct CP Violation, CPT Symmetry, and Other Parameters in the Neutral Kaon System
• Observation of Time Reversal Violation in the B0 Meson System
• Precise measurement of the CP violation parameter sin2phi_1 in B0-->(c\bar c)K0 decays
• Precision measurement of the $B_s^0$-${\bar{B}}_s^0$ oscillation frequency with the decay $B^{0}_{s}\rightarrowD^{-}_{s}π^{+}$
• Determination of the sign of the decay width difference in the B_s system
• Ambiguity-Free Measurement of cos2beta: Time-Integrated and Time-Dependent Angular Analyses of B->J/Psi K pi
• Search for T, CP and CPT Violation in B0-B0bar Mixing with Inclusive Dilepton Events
• Measurements of the Absolute Branching Ratios for the Dominant KL Decays, the KL Lifetime, and Vus with the KLOE Detector
• CP, T and CPT versus temporal asymmetries for entangled states of the Bd-system
• Measurement of the semileptonic charge asymmetry in B0 meson mixing with the D0 detector
• Measurements of KL Branching Fractions and the CP Violation Parameter |eta+-|
• Study of CP-violating charge asymmetries of single muons and like-sign dimuons in p pbar collisions
• Measurement of the flavour-specific CP-violating asymmetry $a_{\mathrm{sl}}^s$ in $B_s^0$ decays
• Charge Asymmetry of Same-Sign Dileptons in $B^0$-${\bar{B}}^0$ Mixing
• Measurement of the semileptonic charge asymmetry using Bs^0 -> D_s mu X decays
• Limits on the Decay-Rate Difference of Neutral-B Mesons and on CP, T, and CPT Violation in B0-antiB0 Oscillations
• Search for a T-odd, P-even Triple Correlation in Neutron Decay
• Search for Time-Dependent CPT Violation in Hadronic and Semileptonic B Decays
• A new limit on the CP violating decay KS -> 3pi0 with the KLOE experiment
• Search for CP Violation in B0B0bar Mixing using Partial Reconstruction of B0-->D*-Xl+ nu and a Kaon Tag
• Measurement of the $B^0$--${\bar{B}}^0$ oscillation frequency $\Delta m_d$ with the decays $B^0\to D^{-}{\pi }^{+}$ and $B^0\to J/\psi K^{\ast 0}$
• Measurement of the time-dependent CP asymmetry in B0 -> J/ψ KS0 decays
• Direct test of time reversal invariance violation in B mesons
• Measurement of the Ratio Gamma(KL -> pi+ pi-)/Gamma(KL -> pi e nu) and Extraction of the CP Violation Parameter |eta+-|
• Subtleties in the BaBar measurement of time-reversal violation
• Correlated neutral B meson decays into CP eigenstates

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