Subtleties in the BABAR measurement of time-reversal violation

4th Symposium on Prospects in the Physics of Discrete Symmetries

Efrati, Aielet^1

Department of Particle Physics and Astrophysics, Weizmann Institute of Science, Rehovot

76100, Israel^1

关键词: CP asymmetries;    CP violations;    Leptonic decay;    Time reversal;    Wrong-sign decays;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/631/1/012016/pdf
DOI  :  10.1088/1742-6596/631/1/012016

来源: IOP

【 摘 要 】

A first measurement of time-reversal (T) asymmetries that are not also CP asymmetries has been recently achieved by the BABARcollaboration. In this talk, which follows the work done in Ref. [1], I discuss the subtleties of this measurement in the presence of direct CP violation, CPT violation, wrong strangeness decays and wrong sign semi-leptonic decays. In particular, I explain why, in order to identify the measured asymmetries with time-reversal violation, one needs to assume (i) the absence of wrong strangeness decays or of CPT violation in strangeness changing decays, and (ii) the absence of wrong sign decays.