18-22 October 2021
Matsue, Shimane Prefecture, Japan
Asia/Tokyo timezone

General helicity formalism for two-hadron production in $e^+e^-$ collisions and the $\Lambda$ polarizing fragmentation function

18 Oct 2021, 21:06
Room 601 (Kunibiki Messe)

Room 601

Kunibiki Messe

Parallel Session Presentation Transverse momentum structure (TMD) Transverse Momentum Structure (TMD)


Umberto D'Alesio (University and INFN Cagliari)


We present the complete structure of the azimuthal dependences and polarization observables for two-hadron production in $e^+e^-$ annihilation processes within a TMD approach adopting the helicity formalism. The leading-twist quark and gluon TMD fragmentation functions (FFs) for spin-1/2 hadrons, with their properties and their probabilistic interpretation, are fully accounted for.
The role of the polarizing FF is discussed in detail and its extraction from Belle data for the transverse polarization of $\Lambda$'s is shown. Predictions for SIDIS processes at EIC are presented.

Primary authors

Umberto D'Alesio (University and INFN Cagliari) Francesco Murgia (INFN Cagliari, Italy) Marco Zaccheddu (University and INFN Cagliari)

Presentation Materials