Probing transversity by measuring Λ polarisation in SIDIS
Collaboration
18 pages
Published in:
- Phys.Lett.B 824 (2022) 136834
- Published: Jan 10, 2022
e-Print:
- 2104.13585 [hep-ex]
DOI:
- 10.1016/j.physletb.2021.136834 (publication)
Report number:
- CERN-EP-2021-072
Experiments:
Citations per year
Abstract: (Elsevier B.V.)
Based on the observation of sizeable target-transverse-spin asymmetries in single-hadron and hadron-pair production in Semi-Inclusive measurements of Deep Inelastic Scattering (SIDIS), the chiral-odd transversity quark distribution functions are nowadays well established. Several possible channels to access these functions were originally proposed. One candidate is the measurement of the polarisation of Λ hyperons produced in SIDIS off transversely polarised nucleons, where the transverse polarisation of the struck quark might be transferred to the final-state hyperon. In this article, we present the COMPASS results on the transversity-induced polarisation of Λ and hyperons produced in SIDIS off transversely polarised protons. Within the experimental uncertainties, no significant deviation from zero was observed. The results are discussed in the context of different models taking into account previous experimental results on and .Note:
- 18 pages, 6 figures
- Quantum chromodynamics
- Deep inelastic scattering
- Lambda polarisation
- Transversity
- muon: secondary beam
- muon: polarized beam
- polarization: longitudinal
- polarized target: transverse
- deep inelastic scattering: semi-inclusive reaction
- nucleon: polarization: transverse
References(0)
Figures(8)
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