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(=POlarisation at Work in Energetic Reactions) |
ii)
Karol Kolodziej made a nice introduction into the use of transversely
polarized beams for the study of longitudinal W's in e+e-->WW.
The transverse e+ and e- beams project out W_L. The W_L are
crucial for electroweak symmetry breaking. The decisive observable
is the azimuthal asymmetry, which is about 10% at high energies.
Information about W_L can therefore be derived without analysing final
state polarisations. For this study both beams e- and e+ have to be
polarised since sigma_T sim PT(e-) x PT(e+)
iii) Wolfgang
Kilian gave a status report about the WHIZARD MC generator.
It is a program for Multi-Particle SM Processes. Full polarisation information
is available. Also processes with transversely polarised initial beams
can be simulated.
Klaus Desch+Student volunteered to provide simulation studies for
e+e- -> WW with transverse beams
iv)
Felix Nagel told us the news about the use of polarised beams
in e+e- -> W W and the study of triple gauge couplings in a general
parametrization with 28 parameters using optimal observables.
The sensitivity increases by about a factor 3 with only P(e-)
and by about a factor 5 with both beam polarised.
For one TGC even the longitudinal polarisation is not
sufficient, however the use of transverse beams seems to be promising.
v) Alexander Wagner gave some new results about polarisation effects
in
SUSY studies: testing the mixing matrix of Sleptons (which should
be diagonal for the first two families) via threshold
studies or via polarisation effects. Next results in Amsterdam.
vi)
Further new studies:
Hahn, Heinemeyer, Weiglein: In order to produce the CP-even Higgs in WW
fusion
if m_A,m_H>>m_Z, the use of both beams polarised could be decisive since
the
coupling cos(beta-alpha) -> 0 in this case and very, very small rates are
expected.
Discussion:
i) Transversely polarised beams in t production?
ii) Transversely polarised beams in the case of CP violation?
iii) write-up