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

Beam-spin induced polarization of Λ and anti-Λ hyperons in semi-inclusive deep-inelastic scattering

20 Oct 2021, 16:30
Room 601 (Kunibiki Messe)

Room 601

Kunibiki Messe

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


Denis Veretennikov


The beam-spin induced polarization of Λ and anti-Λ hyperons produced in deep-inelastic scattering of longitudinally polarized positrons from unpolarized nucleons has been investigated by the HERMES experiment at a positron beam energy of 27.6 GeV. Here, preliminary results are reported from data taken in the years
1999 to 2007, including in particular the two high-luminosity periods of 2006 and 2007 enlarging significantly the data set compared to previous HERMES analyses. The two spin-transfer coefficients D_LX and D_LZ, i.e., transverse and along the hyperon momentum direction, are extracted and studied as function of the relevant kinematic variables.

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