Charged Current Physics Sub-Group

1. Structure Functions with Charged and Neutral Current

a) The flavor separation of the pion and kaon structure could be achieved by comparing the difference between electron and positron interactions involving the Sullivan process with neutral and charged currents.

b) Neutral current.  The xF3 nucleon structure function, which is charge-conjugation odd and mostly dominated by the γZ interference contribution, will be directly sensitive to valence quark distributions. 

c) The charged-current deep inelastic scattering (DIS) cross section measurements provide possibly the most direct information on the flavor dependence of quark and anti-quark distributions. Depending on the charge of the exchanged W boson, the charged current process will be sensitive to either up-type or down-type flavors.

d) The charm and anticharm production in charged current DIS offers the best way to obtain information on strangeness in the nucleon, and the availability of polarized positron and electron beams would provide the necessary tools to extract strange and anti-strange distributions unambiguously.

e) The production of Ds+ mesons in diffractive charged current DIS  could provide information on the gluon structure of  the diffraction mechanism in QCD.