This biennial Review summarizes much of Particle Physics. Using data f
rom previous editions, plus 1600 new measurements from. 550 papers, we
list, evaluate, and average measured properties of gauge bosons, lept
ons quarks, mesons, and baryons. We also summarize searches for hypoth
etical particles such as Higgs bosons, heavy neutrinos, and supersymme
tric particles. All the particle properties and search limits are list
ed in Summary Tables. We also give numerous tables, figures, formulae,
and reviews of topics such as the Standard Model, particle detectors,
probability, and statistics. ii booklet is available containing the S
ummary Tables and abbreviated versions of some of the other sections o
f this full Review. All tables, listings, and reviews (and errata) are
also available on the Particle Data Group website: http://pdg.lbl.gov
.