mfb,
Thanks for the feedback. That is what I thought too when reading over this problem myself. The problem is identical to the question posed by my professor, so I wanted to confirm whether it was a personal miscalculation or a general issue with the problem itself.
Homework Statement
A Higgs boson has mass 125 GeV/c2, decaying into a pair of Z bosons, mass 91 GeV/c2. In the lab frame, one of the Z bosons is at rest. Determine the kinetic energy for the other Z boson in this laboratory frame.
Homework Equations
E = γmc2
γ=1/√(1-β2)
The Attempt at a...