The Δ++ can be produced by colliding a pion beam onto a H2 target, in a reaction π+ + p → Δ++ → π+ + p. In the rest frame of Δ++, the energy and momentum of the pion in the final state (in MeV ) are closest to
(assume c = 1, and mπ ≈ 140 MeV, mp ≈ 1 GeV, mΔ++ ≈ 1.2 GeV)
1
210, 156
2
230, 182
3
175, 105
4
190, 130