Email from David:

Date: Wed, 22 Sep 2004 16:24:58 -0400
From: David S. Armstrong 
To: finn@physics.wm.edu
Cc: 'Yongguang Liang' , 'Mark Pitt' ,
     'Roger Carlini' , 'Jim Birchall' ,
     'Juliette Mammei' , 'Klaus Grimm' ,
     'Neven Simicevic' , 'Greg Smith' ,
     'Allena Opper' , 'Tony Forest' ,
     'Norman Morgan' , 'Mike Finn' ,
     'David Armstrong' ,
     'Shelley Page' , 'Dave Mack' ,
     'Richard Jones' 
Subject: Re: Measurements of Q2


 Hi,

   Two pedagogic footnotes to Mike's nice message on the Q^2 
 determination:

 - Details on how this was dealt with for the HAPPEX-I measurement
   are available in the recent "long" paper: K.A. Aniol et al., 
   Phys. Rev. C 69(2004)065501. Conceptually, what we do for Qweak
   should be rather similar to the HAPPEX case. 

 - When Mike refers to "virtual radiative loss", I think a slightly
   better nomenclature would be "inner bremsstrahlung" or "internal
   bremssatrahlung", since it still refers to a process with a real photon 
   on the final state; the photon is generated at the elementary
   Feynman diagram level of the scattering, as opposed to "external
   bremsstrahlung" which requires finite material, and where the photon
   is generated as the electron propagates through that material.

  cheers,
    David