A meson of mass travels with laboratory momentum and decays isotropically in its rest…

PHYSICS · Subjective · Fermi University Physics · Particle Physics & Quantum Fields · Particles, interactions and experiment · Particles, interactions and experiment

Symmetry and Flavour, Ch Four-vectors at work: boosts, invariants and the shape of a final state

Problem

K_S^0

meson of mass

m_K = 497.6\,\mathrm{MeV}

travels with laboratory momentum

p = 10.0\,\mathrm{GeV}

and decays isotropically in its rest frame to

\pi^+\pi^-

, with

m_\pi = 139.6\,\mathrm{MeV}

. Find the minimum and maximum laboratory energy of a pion from this decay.

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