Two-hadron interference fragmentation functions. Part I: general framework

Abstract

We investigate the properties of interference fragmentation functions measurable from the distribution of two hadrons produced in the same jet in the current fragmentation region of a hard process. We discuss the azimuthal angular dependences in the leading order cross section of two-hadron inclusive lepton-nucleon scattering as an example how these interference fragmentation functions can be addressed separately.

RevTeX, 7 figures, first part of a work split in two, second part forthcoming in few days