New Experiments

1
New Experiments
gt production of p0 near threshold
Fore-aft asymmetry (Afb) in np6dp0
run at TRIUMF on high resolution
spectrometer data taking complete analysis nearly
done expected error 0.0020 (statistical and
systematic) theoretical effect ph mixing
only -0.0037 dmdu only 0.006 final
result within 1-3 months
Expected effect CSB mixing outgoing P-wave with
S-wave, creating fore-aft cross section asymmetry
near threshold
Isospin-forbidden sTOT for dd64Hep0
to be run at IUCF electron-cooled storage
ring construction and commissing
underway expected sensitivity 2 pb data taking
planned for 2002
Expected effect Total cross section is square
of CSB amplitude
For neutron-proton mass difference, expect dmdu
dmg
For p0 production, expect dmdu - dmg/2
In np6dp0 P-wave coupling sensitive to meson
mixing In dd64Hep0 Total cross section
supresses meson mixing
gtgt Theoretical effort will be based on effective
field theory (low momentum limit of QCD). gt
obeys QCD constraints gt expand in small
ratios mp, q, p / mN, LQCD Lagrangians
contain parameters derived from experiment (not
QCD since regime is non-perturbative), check for
internal consistency.