
JOINT PARTICLE SEMINAR
Date: Wednesday, 19
May 2004
Time:
3:00 p.m.
Place: 4135 Frederick Reines Hall
Speaker: Shahriar
Abachi, UCLA
Title: A
Persuasive Scheme for Hadronization Based on a Space-Time Area Law
Abstract: The perturbative
treatment of strong couplings between high energy quarks and gluons has
been applied and tested in several fronts. The non-perturbative regime
however is still lagging behind and a correct or "preferred" approach
is not yet designated. Nevertheless, QCD calculations with expansions
in term of 1/g on the lattice have enjoyed some success. It appears
that the cleanest environment for testing the success of such approach
is in the studies of hadronization in e+ e- collisions, where the
perturbative parts of events, being essentially common for all, are
effectively decoupled. The approach chosen here is a phenomenological
one. Thus lattice calculations are not directly applied; rather the
general feature of the prediction of this approach is employed. It is a
known fact that nearly all QCD on the lattice calculations commonly
predict a space-time area law for the action in the non-perturbative
regime. It is this simple general prediction that we have adopted and
utilized as the main principle for explaining observables in
hadronization. We have compelling evidence that this single adoption
sufficiently explains qualitative features observed in hadronization
measurements and quantitatively predicts all the rates and energy
profiles with great accuracy. We have thereby freed ourselves from
over-parametrizated modeling seen in all competing approaches (such as
Lund's) and have instead focused on identifying the underlying physics
with persuasive results.
Host: J. Feng