2021 Impact factor 4.991
Particles and Fields
Eur. Phys. J. C 27, 523-529 (2003)
DOI: 10.1140/epjc/s2003-01131-7

Toward an experimental determination of possible vacuum regeneration for neutral flavoured mesons

G.V. Dass

Department of Physics, Indian Institute of Technology, Powai, Mumbai 400 076, India

(Received: 25 October 2002 / Revised version: 20 December 2002 / Published online: 7 March 2003 )

The usual phenomenology of the complex formed by a neutral flavoured meson M0 and its antiparticle $\bar M^0$ assumes the absence of vacuum regeneration in this complex. We propose experiments for determining the two amplitudes of (possibly non-zero) vacuum regeneration: (i) a comparison of the time dependence of decays of the M0 and $\bar M^0$ into a channel which could be a CP-eigenstate (e.g., $\pi ^+ \pi^-$ or $\pi^0 \pi^0 \pi^0$), or a general channel like $\pi l \nu $; (ii) a measurement of the ratio of the time-dependent transmutations, $(M^0
\rightarrow \bar M^0)$ and $(\bar M^0 \rightarrow
M^0)$ ; (iii) a measurement of the ratio of the time-dependent probabilities for the production of $\vert M^0 M^0 \rangle$ and $\vert \bar
M^0 \bar M^0 \rangle$ states, starting with a C-odd correlated $\vert M^0 \bar M^0\rangle $ state like the $\phi$-meson. The proposed experiments are required to be as accurate as those for the known CP-violation effects in the $(M^0,\bar M^0)$ complex.

© Società Italiana di Fisica, Springer-Verlag 2003