The Asymmetric B Factory
PEP is now being upgraded to serve as a
facility, dubbed the Asymmetric B Factory or PEP-II, that will produce
millions of B quarks.
Proposed by a group of scientists from SLAC, the
Laboratory, and the
Lawrence Livermore National
Laboratory, the B Factory will be an extensive modification and
upgrade of the present PEP machine. It will make use of much of the
existing equipment and infrastructure, but include a second ring of
magnets and other devices to increase the collision rate about fifty
times. A key feature of this collider is the fact that electrons and
positrons will circulate and collide with unequal energies.
The prospective research program for such a facility is very rich; a
central theme will be the detailed study of the difference between
matter and antimatter. This phenomenon, called CP violation, appears
to be a crucial ingredient in the formation of the universe, yet we
have a very poor understanding of it. This program requires the
copious production of the particles known as B-mesons, which in turn
means that the B Factory must operate at a very high collision rate.
[B Factory Home Page]
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14 December 1995