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Isospin Symmetry of Fragmentation Functions

18 Aug 2021, 10:40
20m
Oral report 2. 强子物理与味物理 Parallel Session II:Hadron and Flavor Physics

Speakers

Kai-bao Chen (Shandong Jianzhu University) Shu-yi Wei (ECT) Yu-kun Song (University of Jinan) Zuo-tang Liang (Shandong University)

Description

In this talk, we present a systematic study of the isospin symmetry of fragmentation functions by taking decay contributions into account. We show that in the unpolarized case the isospin symmetry is held for fragmentation functions of Λ and only tiny violations are allowed for other hadrons due to the contributions from weak decays. We present a rough estimate of the magnitudes of such violations. In the polarized case, we show that the isospin symmetry violation for Λ production should be tiny and the recent Belle data on the transverse polarization of Λ can be reproduced if the isospin symmetry is kept in the corresponding polarized fragmentation functions.

Primary authors

Kai-bao Chen (Shandong Jianzhu University) Shu-yi Wei (ECT) Yu-kun Song (University of Jinan) Zuo-tang Liang (Shandong University)

Presentation materials

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