EIC opportunities for Snowmass

Extraction of the Λ Polarizing Fragmentation Function from Belle e+e− data

27 Jan 2021, 13:25

10m

Online

Jets Jets at EIC

Speaker

Marco Zaccheddu (Università degli studi di Cagliari & INFN)

Description

We present a phenomenological analysis of the experimental data from Belle Collaboration for the transverse polarization of Lambda's measured in $e^{+}{e}^{-}$ annihilation processes, both for the case of associated and inclusive (plus a jet) production. We extract for the first time, within a TMD approach, the quark polarizing fragmentation function for a Lambda hyperon, a distribution giving the probability that an unpolarized quark fragments into a transversely polarized spin-1/2 hadron. Similar analyses in $eP\to e\mathrm{\Lambda }+X$ processes at the EIC will be crucial for understanding the universality and evolution properties of the TMD polarizing FF.

Presentation materials

EIC_SM_Marco_Zaccheddu.pdf