Speaker
Description
Single inclusive hadron production in Deep Inelastic Scattering serves as standard candle observable for probing the 3D partonic structure of proton or nuclear targets. In this talk, I will focus on particle production in the target fragmentation region. At moderate Bjorken-x, this kinematic regime is described by the framework of transverse momentum dependent (TMD) fracture functions. To extend the study of fracture functions into the small-x region, we consider the differential cross-section for single-inclusive jet/hadron production with transverse momentum Pt in DIS, mediated by a longitudinally polarized virtual photon of virtuality Q^2>>Pt^2. We show that this cross-section is not power-suppressed in Pt/Q, and can be factorized in terms of TMD quark and gluon fracture functions at small x, for which the Color Glass Condensate provides explicit analytic expressions.
