Decay of B+ → J/ψ K+

Plot the mass distribution of a charged B which decays to a combination of J/ψ and K

$B^+ \longrightarrow J/\psi K^+\quad\text{or}\quad B^- \longrightarrow J/\psi K^-$

You will find a peak in the $B^+$ mass at 5.28 $\mathrm{GeV}/c^2$

Use the block ‘Combine 2 particles’ and describe the process in two stages.

Be sure to select only the particles with a correct invariant mass of J/ψ for further analysis.

Exercise 8