
SPECIAL JOINT PARTICLE SEMINAR
Date: Tuesday,
11 March 2003 Time: 3:00 p.m.
Place: 4135 Frederick Reines Hall
Speaker: Harry Lipkin,
Weizmann and Tel Aviv University
Title: Experimental
Challenges for QCD -- The Past and the Future
Abstract: QCD is supposed to
explain everything about Hadron Physics - But How? QED is supposed to explain
everything about Superconductivity. Will explaining Hadron Spectrocopy
from QCD be as difficult as explaining Superconductivity from QED?
The Past leaves us with many experimental regularities which await explanation
by QCD. Surprising agreement with experiment from simple Sakharov-Zeldovich
model (1966) having quarks with effective masses and hyperfine interaction.
Nambu's (1966) Colored quarks with gauge gluons gave mass spectrum with
only $qqq$ and $\bar q$ bound states. The topological quark-line
OZI rule does not follow from any symmetry and predicts experiments
successfully without any solid theoretical justification.
The future offers many new experimental opportunities to learn about QCD
from heavy flavor physics. Weak Decays need hadron models and QCD to interpret
decays, but have too many diagrams, too many free parameters, too many
decay modes, too much data. Need phenomenologists to choose data for analysis.
Experimental results from B and Charm factories that defy conventional
wisdom can provide clues to new physics and inadequacies in hadron models.
Host: J. Feng