Subject line:  Invitation to support a future linear e+e- collider


Dear colleague,

As part of the work of the Worldwide Study of Physics and Detectors for a 
Future Linear Collider a document supporting the linear collider programme  
has been written*:

"Understanding Matter, Energy, Space and Time : The Case for the e+e-
Linear Collider".

It sets out the scientific case for a 500 GeV e+e- linear collider,
upgradable to higher energy in future and with options retained for
special investigations with alternate beam particles and added
polarization capability.

Our goals for this document are to:

1.  Give the first coordinated statement of the case for the Linear
    collider by physicists in all regions of the world, and outline
    the nature of the detector requirements.  

2.  Provide an outline of the scientific goals that is accessible to
    scientists in related fields.

3.  Provide the background for how future evolution of our physics 
    understanding will shape the need for optional added features;
    this information is needed for the international planning
    to set the linear collider parameters and baseline scope.

4.  Describe the place of the linear collider program in relation
    to the LHC research, and in the larger context of other major 
    thrusts within high energy physics.

The document notes that two technical proposals for realizing a linear
collider now exist, but makes no judgement on which might be chosen.

It was first circulated in October 2002 and has been publicly debated at
open meetings during Linear Collider Workshops at Prague in November and
at Arlington Texas in January.  Inputs from those meetings and by email
have been incorporated in the final version of the document, which can be
found at:

http://sbhep1.physics.sunysb.edu/~grannis/wwlc_report.html

We are preparing a list of those who support the Linear Collider
project and the pursuit of the scientific goals outlined in the
document.  This list, to be made available on the International LC
web page, will serve as a demonstration of the widespread support
in the community for the linear collider project.  Those on the
mailing list of the Asian, European or North American linear
collider working groups should already have been contacted to ask for 
permission to include them as signatories.  We welcome the signatures of 
any particle phsyicists who wish to give their support.

If you are not now on one of the regional LC mailing lists you may join
the supporter's list by accessing the following interactive website:

http://www-flc.desy.de/lcsurvey/.

If you wish to, lease try and add you name before March 7.  That is not a
hard cutoff, but we would like to go public soon after that.

Many thanks


Yours sincerely


David Miller

Chair of the ECFA/DESY Study on
Physics and Detectors for a Linear Collider;
co-chair of the Worldwide Study.
___________________________________________________
* Drafting panel; Paul Grannis (Stony Brook, USA), Francois
Richard (Orsay, France), Takayuki Matsui (KEK, Japan), Sachio Komamiya
(Tokyo, Japan).


-- 
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 * Prof. David J. Miller,       UCL, Dept. of Physics and Astronomy *
 * +44 207 679 7152 (fax 7145)  Gower St., London WC1E 6BT, UK.     *       
 * Mobile +44 7747 030 752      http://www.hep.ucl.ac.uk/~djm/      *
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