[RBRC Seminar] Jet production in DIS in the target fragmentation region at small x

by Paul Caucal

Thursday May 8, 2025, 12:30 PM → 2:30 PM US/Eastern

2-160 (https://bnl.zoomgov.com/j/1600983728?pwd=RAD7OLcqre7Ycsp6JfFp6HAnpyLxex.1)

Single inclusive hadron production in Deep Inelastic Scattering (DIS) serves as a 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, I 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​. I will 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.