Bs0 to Ds pi pi pi [supersedes part of !1301]
ADD PRODUCTION DESCRIPTION HERE!!!
Instructions
The decay channel is B_s^{0}\to D_s^+ \pi^+ \pi^- \pi^+ using Run1/2 data.
Saving more useful variables and using new DaVinci version.
Change ReFitPVs in combineparticles to True.
Edited by Linxuan Zhu