Wednesday, May 21st - h.
Auditorium B. Touschek
Univ. of Regina, Canada
It takes glue
to study the "Glue"
One of the main scientific questions that remains unanswered
is the nature and behaviour of the "Glue" which holds the quarks together.
The puzzling feature of this construction is that quarks are never found
free, but only in triplets or pairs, that is known as "confinement".
Since gluons carry colour charge, they can form chromoelectric flux tubes,
which may result in glueballs or hybrid combinations of gluons and quarks.
In certain models, the later can be produced with JPC quantum numbers not
allowed in the simple quark picture. An international experiment (GlueX)
is being proposed to search for such exotic hybrid mesons at Jefferson Lab,
Virginia, and thus elucidate the phenomenon of confinement. The GlueX
program will be presented, with emphasis on the electromagnetic calorimeter
R&D at the University of Regina, for which scintillating fibers are glued
onto a lead matrix.