Transverse momentum and azimuthal angle distributions of hadrons in DIS at COMPASS
Abstract
The COMPASS experiment plays an important role in studies of nucleon structure. Measurements performed in 2016-2017 with an unpolarised liquid hydrogen target and a longitudinally polarised 160 GeV/c muon beam provide a high-statistics data sample for the analysis of semi-inclusive deep-inelastic scattering, giving access to transverse-momentum-dependent parton distribution and fragmentation functions. The 2016 data set was analysed to determine the multiplicities of hadrons produced in DIS differential in x, Q2 and PT, as well as the amplitudes of azimuthal modulations in the hadron azimuthal-angle distributions. In particular, the unpolarised asymmetries Acos ϕhUU (related to the Cahn effect), Acos 2ϕhUU (sensitive to the Boer--Mulders function), and the beam-spin asymmetry Asin ϕhLU were extracted in 4-dimensional bins matching those of the multiplicities, and also integrated over some of the variables.
Related
- Update on transverse-spin azimuthal asymmetries in single-hadron SIDIS on transversely polarised deuterons at COMPASS
- An invertible map between 3D Breit-frame mechanical distributions and 2D infinite-momentum-frame mechanical densities in spin-1 hadrons
- Final-state effects on the transverse-momentum spectra of charged hadrons in p+Pb and Pb+Pb collisions at √(sNN) = 5.02~TeV using the modified Tsallis distribution
- Gravitational transverse momentum dependent distributions for the gluons
- Energy-momentum tensor at small x from gravitational transverse-momentum distributions
BibTeX
@misc{benesova2026transverse,
title = {{Transverse momentum and azimuthal angle distributions of hadrons in DIS at COMPASS}},
author = {Vendula Benešová},
howpublished = {arXiv},
year = {2026},
month = sep,
doi = {10.48550/arxiv.2609.17222},
eprint = {2609.17222},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2609.17222},
}
RIS
TY - UNPB
TI - Transverse momentum and azimuthal angle distributions of hadrons in DIS at COMPASS
AU - Vendula Benešová
PY - 2026
DA - 2026/09/15
PB - arXiv
DO - 10.48550/arxiv.2609.17222
UR - https://arxiv.org/abs/2609.17222
AB - The COMPASS experiment plays an important role in studies of nucleon structure. Measurements performed in 2016-2017 with an unpolarised liquid hydrogen target and a longitudinally polarised 160 GeV/c muon beam provide a high-statistics data sample for the analysis of semi-inclusive deep-inelastic scattering, giving access to transverse-momentum-dependent parton distribution and fragmentation functions. The 2016 data set was analysed to determine the multiplicities of hadrons produced in DIS differential in x, Q^2 and P_T, as well as the amplitudes of azimuthal modulations in the hadron azimuthal-angle distributions. In particular, the unpolarised asymmetries A^cos ϕ_h_UU (related to the Cahn effect), A^cos 2ϕ_h_UU (sensitive to the Boer--Mulders function), and the beam-spin asymmetry A^sin ϕ_h_LU were extracted in 4-dimensional bins matching those of the multiplicities, and also integrated over some of the variables.
ER -