B baryon 3body lines for 24c3 MD

This is a AP to try merging all these decays into one root file: (1) Lambda_b -> J/psi(2mumu) p K-; (2) Lambda_b -> J/psi(2mumu) p pi-; (3) Bp -> J/psi(2mumu) K_S(2pipi) pi+;(LL and DD) (4) Xi_b -> J/psi(2mumu) Lambda(2ppi-) K;(LL and DD) (5) Bp -> J/psi(2mumu) p Lambda~(2p~pi+); (LL and DD) (6) Bp -> J/psi(2mumu) phi(1020) K+; (7) B -> J/psi(2mumu) p p~ (8) B -> J/psi(2mumu) p pi-