Disentangling violations of CPT from other new-physics effects

Abstract

We analyze the prospects for observing CPT violation using neutral-meson P0-P0bar systems. Before one can claim a measurement of CPT violation, one must be able to rule out the possibility that its result is due to simpler new-physics effects. In particular, one must be able to separate the CPT-violating quantities from parameters violating the Delta P = ΔQ rule of semileptonic decays, and from new-physics contributions to the production mechanism of the neutral mesons. One can isolate CPT violation using the semileptonic decays of single, tagged neutral mesons; unfortunately, this situation cannot be implemented at the Upsilon(4S). For P0-P0bar pairs produced in a correlated parity-odd state we show that, by combining the di-lepton with the single-lepton decays, it is in principle possible to extract unambiguously one CPT-violating parameter. Finally, we develop the formalism necessary for describing new-physics effects in the production mechanism; this includes both cascade decays and violations of the rule of associated production.

21 pages, latex, no figures

References in corpus (5)

• Lorentz-Violating Extension of the Standard Model
• Sensitivity of CPT Tests with Neutral Mesons
• New CP-violating parameters in cascade decays
• Detecting new physics contributions to the D0-D0bar mixing through their effects on B decays
• Opposite-sign Dilepton Asymmetry of Neutral B Decays: a Probe of New Physics from CPT or ΔB = ΔQ Violation

Cited by in corpus (13)

• CPT, T, and Lorentz Violation in Neutral-Meson Oscillations
• Nearly degenerate heavy sterile neutrinos in cascade decay: mixing and oscillations
• Irreversibility and dissipation in neutral B-meson decays
• On the use of the reciprocal basis in neutral meson mixing
• CPT violation in entangled B0-B0bar states and the demise of flavour tagging
• Time evolution of cascade decay
• Possible test for CPT invariance with correlated neutral B decays
• Using time-dependent indirect $CP$ asymmetries to measure $T$ and $CPT$ violation in $B^0$-${\bar{B}}^0$ mixing
• Behaviour of observables for neutral meson decaying to two vectors in the presence of $T$, $CP$ and $CPT$ violation in mixing only
• CPT violation and cascade decays
• Dealing with T and CPT violations in mixing as well as direct and indirect CP violations for neutral mesons decaying to two vectors
• Testing the Wigner - Weisskopf approximation by using neutral-meson - antimeson correlated states
• A fresh look at neutral meson mixing