Discovery of the Ks

1

Discovery of K+ → π+ π- π+

2

τ+ historical name

Emulsion technique, Bristol group, 1949

Baryon and meson multiplets

3

Baryon Decuplet

4

Discovery of the c-Quark

5

1974: “November Revolution” – Discovery of the J/ψ, bound state of new quark

−+−+−+ → µµ, hadrons, eeeeSLAC BNL p(28 GeV)+Be →e+e-X

Resonance w/ large mass narrow width Γ=87±5 keV

Not

orig

inal

pap

er

P

P

S.C.C. Ting et al.

B. Richter et al.

Both articles appeared in the same issue of Phys. Rev. Let.

MARK-I Detector

= prototype of a compact 4π detector

B field

Baryon multiplets

8

LHCb Collab. 2017

Discovery of the Υ(bb)

9

Excited Upsilon-States

10

Discovery of the Top-Quark