Update on transverse-spin azimuthal asymmetries in single-hadron SIDIS on transversely polarised deuterons at COMPASS
Abstract
Over the years, the COMPASS experiment at CERN has pursued an extensive SIDIS programme aimed at a comprehensive understanding of the structure of the nucleon, using a high-energy muon beam and polarised targets. Within this programme, measurements with a transversely polarised deuteron target were performed in 2022 using the 160 GeV/c muon beam. In single-hadron SIDIS on such a target, eight transverse-spin-dependent azimuthal asymmetries arise, providing sensitivity to several transverse-momentum-dependent parton distribution functions and to subleading-twist partonic correlations. We report the simultaneous extraction of all eight asymmetries from the complete 2022 deuteron sample. The Collins and Sivers asymmetries, previously presented using about 70% of the 2022 statistics, are updated with the full sample and found consistent with the earlier result, while the six remaining asymmetries are presented for the first time with the full 2022 statistics. Combined with the existing proton results, these measurements complete a comprehensive COMPASS programme on transverse-spin effects in SIDIS, providing essential input for global analyses.
Related
- Transverse momentum and azimuthal angle distributions of hadrons in DIS at COMPASS
- QCD corrections to light-quark dipole sensitivity via transverse spin asymmetries at the Electron-Ion Collider
- Closed-form dyadic Green functions for transversely uniaxial bianisotropic medium with equal magnetoelectric scalars
- Electromagnetic Field of an Oscillating Point Charge Measured by a Transversely Comoving Observer
- Dihadron azimuthal asymmetry and light-quark dipole moments at the Electron-Ion Collider
BibTeX
@misc{hoghmrtsyan2026update,
title = {{Update on transverse-spin azimuthal asymmetries in single-hadron SIDIS on transversely polarised deuterons at COMPASS}},
author = {Artur Hoghmrtsyan},
howpublished = {arXiv},
year = {2026},
month = oct,
doi = {10.48550/arxiv.2610.36224},
eprint = {2610.36224},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2610.36224},
}
RIS
TY - UNPB
TI - Update on transverse-spin azimuthal asymmetries in single-hadron SIDIS on transversely polarised deuterons at COMPASS
AU - Artur Hoghmrtsyan
PY - 2026
DA - 2026/10/26
PB - arXiv
DO - 10.48550/arxiv.2610.36224
UR - https://arxiv.org/abs/2610.36224
AB - Over the years, the COMPASS experiment at CERN has pursued an extensive SIDIS programme aimed at a comprehensive understanding of the structure of the nucleon, using a high-energy muon beam and polarised targets. Within this programme, measurements with a transversely polarised deuteron target were performed in 2022 using the 160 GeV/c muon beam. In single-hadron SIDIS on such a target, eight transverse-spin-dependent azimuthal asymmetries arise, providing sensitivity to several transverse-momentum-dependent parton distribution functions and to subleading-twist partonic correlations. We report the simultaneous extraction of all eight asymmetries from the complete 2022 deuteron sample. The Collins and Sivers asymmetries, previously presented using about 70% of the 2022 statistics, are updated with the full sample and found consistent with the earlier result, while the six remaining asymmetries are presented for the first time with the full 2022 statistics. Combined with the existing proton results, these measurements complete a comprehensive COMPASS programme on transverse-spin effects in SIDIS, providing essential input for global analyses.
ER -