Novel correlated ${{{D}^{0}}{\overline{D}{}^{0}}}$ systems for ${c/b}$ physics and tests of ${T/CPT}$

Abstract

Decays of charmonia(-like) particles with definite J P C (e.g. χ c1 (3872)), to a D 0 D 0 system and any combination of C-definite decay particles, are sources of quantumcorrelated D 0 D 0 systems with C = P = ±1. Methods to separate the C = ±1 D 0 D 0 components from χ c1 (3872) decay samples are presented. Studying T and CP T conservation in C = +1 D 0 D 0 allows a final state reconstructibility advantage. Several production mechanisms offer opportunities to collect C = +1 D 0 D 0 systems.

New ideas on $\gamma$ / $\phi_3$ measurements

“…This measurement, however, cannot be done in hadronic environment because the broad 𝜓(3770) state is difficult to extract in presence of combinatoric background. Recently, the state 𝜒 𝑐1 (3872) (also known as 𝑋 (3872)) was suggested as a promising source of quantum-correlated 𝐷 meson pairs [14].…”