[填空题]
Calculate the Q-value for tho5qhp1;qg -k re yc )k8r e hj/ k9n q,ldz7m;v6u,zsfu;reaction $\pi^- + p \to \Lambda^0 + K^0$ when negative pions strike stationary protons. Estimate the minimum pion kinetic energy needed to produce this reaction. [Hint: Assume $\Lambda^0$ and $K^0$ move off with the same velocity.]
Q = MeV
$\text{KE}_{\pi^-}$ = MeV
