# "The two-loop helicity amplitudes for qqb' -> V1V2 -> 4 leptons"
# T. Gehrmann, A. von Manteuffel, L. Tancredi
#
# This file is describes the qqb->V1V2 kinematics in Reduze2 format.

---
kinematics : 
  incoming_momenta: [ p1, p2 ]
  outgoing_momenta: [ p3, p4 ]
  momentum_conservation: [p4, "p1 + p2 - p3"]
  kinematic_invariants:
    - [s, 2] 
    - [t, 2]
    - [ma2, 2]
    - [mb2, 2]
  scalarproduct_rules:
    - [[p1,p1],  0]
    - [[p2,p2],  0]
    - [[p3,p3],  "ma2"]
    - [[p4,p4],  "mb2"]
    - [[p1+p2,p1+p2],  "s"]
    - [[p1-p3,p1-p3],  "t"]
    - [[p2-p3,p2-p3],  "ma2+mb2-s-t"]