Rapiditiy and center of mass energy

[earth2]

Hey Folks,

i just wondered if there is a direct connection between the rapidity parameter y and the center of mass energy squared s (for example in the case of two colliding massless particles (aka high energy approx). I tried googling it, but failed to find any satisfying answer.

Thank you in advance!
earth2

 

[Vanadium 50]

There are lots of kinematic relationships. It's like saying "is there a relationship between an object's position and it's energy?" Sure...but the exact relation depends in the exact situation.