For each topic the contact persons of the editorial board are given and
everybody who made a study with
regard to beam polarisation should contact these people himself. It is
planned to have a draft in the end of June.
PLEASE LET US KNOW ABOUT YOUR CONTRIBUTIONS!
Authorship of this document does not mean that you have to write yourself
-- but you can, of course --
but it would be highly appreciated that you at least inform the contact
persons about your study with key
points, references and main results.
IN ORDER TO MAKE OUR WANTED LC AS EFFICIENT AS POSSIBLE, PLEASE,
GIVE YOUR INPUT TO THE CONTACT PERSONS!
I. Introduction:
Theory: chirality<->helicity,
definitions, conventions,history
Beam
polarisation as an analyzer for the coupling structure
Expected
degree of polarisation at a future LC
II. Physics with Polarisation:
Electron
polarisation only: quite short, good summary and list of references
Update (e.g. CP-violation in tau sector,
news)
SM -> New Physics
Contact:
Electron+positron
polarisation: Improved accuracy for effective polarisation, statistics
Table with background scaling factors for W and Z
( and S/B and S/sqrt{B})
Few examples from SM, Higgs, New Physics,....
Susy background studies,...
Effects of radiative corrections in polarisation observables
Implementation
in Monte Carlo Generators
Contact:
Positron polarisation
essential for: Update,
Susy studies ( chiral quantum numbers of selectrons, e.g.)
Highest precision at GigaZ
`Preparation for new physics searches'
Try to make all studies more homogeneous
Contact:
Physics case for
transverse polarisation: Sensitivity to longitudinal W-bosons
CP-violation phenomena
Effects in Susy and Extra dimension
Test of mixing matrices for Susy particles
Implementation in Monte
Carlo Generators
Contact:
III. Machine issues:
Remarks
about machine operation of polarised sources: Loss of luminosity?
Machine time for running-in
Reduced intensity of positron beam?
Increased energy spread?
Order of magnitude of saved money?
Electron
polarisation: History, results, short description of the hardware
New developements in gradient doping
Contact:
Positron
polarisation: Description of the hardware, possible schemes
Order of magnitude of additional costs
Helical undulator from the very beginning
Design and operation characteristics of spin rotators
Number of spin rotators
Plans/results from Cornell
Plans/results from Daresbury
Expected polarisation degree (E-dependence?)
Impact on lumi and energy spread
Cost
Description of E166: short description
physics potential: what does it tests?
for what is it essential?
Contact:
Transverse polarisation: short description of hardware
order of magnitude of additional costs
which R&D needed?
cost of spin rotators?
Contact:
IV. Polarisation Measurement:
History, results
Possibilities: Compton, Moeller, Bhabha
Technical potential
Pro's and Con's
Electron+positron polarisation: short description of the polarimeter
Polarimetry for transverse beam polarisations
Achievable precision
Polarisation transport and depolarisation in the IP
Polarimetry up- and/or downstream?
Technical possibilities at the LC designs
Cost
Polarimetry needed for E166
Contact:
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