The meson ( ) has a proper mean decay length (PDG 2024)

PHYSICS · Multi-part · 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

The

D^0

meson (

m_D = 1864.84\,\mathrm{MeV}

) has a proper mean decay length

c\tau = 122.9\,\mu\mathrm{m}

(PDG 2024). Using

\hbar c = 0.19733\,\mathrm{GeV\,fm}

: ((a)) calculate its total decay width in meV; ((b)) a

D^0

is produced with laboratory momentum

p = 25.0\,\mathrm{GeV}

. Calculate the mean distance it travels in the laboratory before decaying, in mm.

Browse the problem library