in runge kutta the mean of beta is not at 1, it is larger, why?
tails come from tofino. (cut on chiq and distance does not help to improve spectrum)

• tof geant level is fine
  

• tofhitsim level is also ok
  

• beta vs mass
  

• beta vs mass, mass>0
  

• beta vs p
  

• beta vs theta shows that the problem exist over all theta range
  

• runge kutta polarity: red: -1, green: +1:
  

• rungekutta red: tofino green:tof:
  

-- YvonnePachmayer - 25 Nov 2005