The E852 Collaboration is currently in the process of carrying out
a systematic search for gluonic mesons produced in
interactions at 18 GeV/c. This effort, along with others extant
in the U.S., in Europe and in Japan, is expected to yield a more complete
picture of the role of valence gluons as constituents in hadrons.
However, all these experiments concentrate on the final states produced
by an initial system containing only light, non-strange quarks.
A scan of the Review of Particle Properties reveals that
very little is known about the gluonic strangeonia (ss + g).
Recently, F. Close and P. Page have extended the
flux-tube model of hadrons to the strangeonium sector
with gluonic excitations having both exotic and non-exotic quantum
numbers. Their predicted masses range from 2.15 to 2.25 GeV,
with the widths ranging from 120 to 575 MeV.
In particular, they predict a narrow (width 120 MeV)
non-exotic gluonic strangeonium at mass 2.15 GeV with the quantum
numbers
coupling to
and
. It would be exciting indeed
to find such a narrow object.
A systematic search for these gluonic strangeonia (ss + g)
will require a separated K
beam interacting with a nucleon.
For this we require an RF separated beam and assume that such a
beamline is set up leading to the BNL Multi-Particle Spectrometer (MPS).
With an upgraded AGS, one can reasonably take
protons or
25 tera protons (TP) on the primary target leading to the MPS, and
this is expected to yield a flux of
per spill
for a K
beam at 12 GeV/c.
If one assumes a live K
beam of
per spill
(corrected for the deadtime) on a 60-cm LH
target and a running time
of 5,000 AGS hours at 1,000 spills per hour, then one can achieve
a visible sensitivity of 330 events/nbarn, assuming an overall acceptance
of 10%. For comparison, one may recall that the LASS experiment at SLAC
(
interactions at 11 GeV/c) had a sensitivity of 4.1 events/nbarn.