In this letter, an overview is given for interesting tests of both CP and
Time Reversal symmetries with the beauty baryon Λb​. Extensive use of
the helicity formalism and HQET is done for all calculations. Then, emphasis is
put on sophisticated methods like analysis of resonance polarizations and
particular angle distributions which can exhibit a clear signal of TR
violation.Comment: 4 pages, 1 figure, 3 tables. Talk given at the 13th International QCD
Conference 3-7th July 2006 Montpellier (France