Tests of CPT invariance for neutral flavored meson-antimeson mixingG.V. Dass1 and W. Grimus2
1 Physics Department, Indian Institute of Technology, Powai, Mumbai 400076, India
2 Institut für Theoretische Physik, Universität Wien, Boltzmanngasse 5, 1090 Wien, Austria
(Received: 5 August 2002 / Published online: 25 October 2002 )
We focus on two aspects of CPT invariance in neutral meson-antimeson ( ) mixing: (1) tests of CPT invariance, using only the property of "lack of vacuum regeneration", which occurs as a part of the well-known Lee-Oehme-Yang (LOY) theory; (2) methods for extracting the CPT-violating mixing parameter through explicit calculations by fully using the LOY-type theory. In the latter context, we demonstrate the importance of the C-even state. In particular, by measuring the time dependence of opposite-sign dilepton events arising from decays of the C-even and C-odd states, may be disentangled from the parameters and characterizing violations of the rule. Furthermore, these two parameters may also be determined. The same is true if one uses like-sign dilepton events arising from only the C-even state.
© Società Italiana di Fisica, Springer-Verlag 2002