The Demise of Flavour Tagging and its Delta-T Dependence

EZEQUIEL ALVAREZ, JOSE BERNABEU, MIGUEL NEBOT

Lisboa, Portugal

Conferencia; International EuroConference on High Energy Physics; 2005

European Physical Society

 In this work we discuss how the loss of particle-antiparticle identity due to CPT violation affects the observables in the decay of two neutral EPR-correlated $B$-mesons. We study this possible new effect in the context of equal-sign flavour specific decays and we find a considerable modification in the $Delta t$-dependence of the equal-sign dilepton charge asymmetry, $A_{sl}$. Although the more important changes occur right outside the $Dt$ region that has been up-to-the-date effectively explored, we show that a deeper experimental research may be able to distinguish a possible existence of this new CPT violating parameter, $w$. In any case, using the available data for $A_{sl}$, we put the first limits on $w$.