# The 24th International Spin Symposium

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

## Extracting the $\Lambda$ polarizing Fragmentation Function from Belle $e^+e^-$ data within the TMD formalism.

18 Oct 2021, 21:24
18m
Room 601 (Kunibiki Messe)

### Room 601

#### Kunibiki Messe

Parallel Session Presentation 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 $\Lambda$-hyperons in $e^+e^-$ annihilation processes allowed to extract, for the first time, the $\Lambda$ 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.

### Primary authors

Marco Zaccheddu (Istituto Nazionale di Fisica Nucleare, Università degli Studi di Cagliari) Umberto D'Alesio (University and INFN Cagliari) Francesco Murgia (INFN Cagliari, Italy)

### Presentation Materials

There are no materials yet.