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

Abstract

Abstract Decays of charmonia(-like) particles with definite J PC (e.g. χ c1(3872)) to a D 0 D ¯ 0 $$ {D}^0{\overline{D}}^0 $$ system and any combination of C-definite decay particles, are sources of quantum-correlated D 0 D ¯ 0 $$ {D}^0{\overline{D}}^0 $$ systems with C = P = ±1. Several b-hadron decays also produce quantum-correlated D 0 D ¯ 0 $$ {D}^0{\overline{D}}^0 $$ systems. Advantages of isolating these systems in their C = +1 components for amplitude analyses and studies of lineshapes are discussed. Methods to separate the C = ±1 D 0 D ¯ 0 $$ {D}^0{\overline{D}}^0 $$ components from χ c1(3872) decay samples are presented. Studies of T and CPT conservation in C = +1 D 0 D ¯ 0 $$ {D}^0{\overline{D}}^0 $$ systems can be performed with more easily reconstructible final states, when compared to C = −1 D 0 D ¯ 0 $$ {D}^0{\overline{D}}^0 $$ systems. Experimental mechanisms that can produce C = ±1 D 0 D ¯ 0 $$ {D}^0{\overline{D}}^0 $$ systems are described in an appendix.

Keywords

• Charm Physics
• CP Violation
• CKM Angle Gamma
• e +-e − Experiments
• Oscillation