Update DecayLengthSignificance and Lifetime functions to use the same math
- Updated DecayLengthSignificance and Lifetime functions to use the same math. The Lifetime function should also have become a bit more stable and faster.
- Removed the counter for the poorly converging fits, because it is not very useful. (Poor IPCHI2 candidates tend to converge very poorly.) There still is a counter for the failed fits: this is something we should really keep watching.
Edited by Wouter Hulsbergen