The 24th International Spin Symposium

Extracting the Λ polarizing Fragmentation Function from Belle e+e− data within the TMD formalism.

18 Oct 2021, 21:24

18m

Room 601 (Kunibiki Messe)

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

Speaker

Marco Zaccheddu (Istituto Nazionale di Fisica Nucleare, Università degli Studi di Cagliari)

Description

Data from the Belle Collaboration for associated production (with a light unpolarized hadron) and single-inclusive production of transversely polarized $\mathrm{\Lambda }$-hyperons in $e^{+}{e}^{-}$ annihilation processes allowed to extract, for the first time, the $\mathrm{\Lambda }$ polarizing fragmentation function, by adopting a simplified TMD approach.
Recent theoretical developments on the computation of cross sections for single-inclusive hadron production in $e^{+}{e}^{-}$ annihilation, within a Soft Collinear Effective Theory approach, combined with the CSS formalism for the double-hadron production case, can be used to perform a renewed analysis, adopting a proper TMD factorization scheme. Preliminary results and a comparison between the two analyses are presented.

Presentation materials

Spin2021_Marco_Zaccheddu.pdf