T-odd phenomena

• T-invariance does not constrain (x,pT)

• Effects are connected to gauge link

  • They require ‘leading’ pT-effects
  • They change of sign from SIDIS to DY
  • They spoil density interpretation of functions and relation to lc wf

• Phenomenology of T-odd functions exist

• Similar T-odd effects exist at subleading (twist-3) level

• Experiment can give answers via specific experiments

Notes: