Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: New results on transverse spin asymmetries from COMPASS   One of the important objectives of the COMPASS experiment is the exploration
of transverse spin structure of nucleon via spin (in)dependent azimuthal
asymmetries in semi-inclusive deep inelastic scattering (SIDIS) of polarized
leptons (and soon also Drell-Yan (DY) reactions with $\pi^-$) off transversely
polarized target. For this purpose a series of measurements were made in
COMPASS, using 160 GeV/c longitudinally polarized muon beam and polarized
$^6LiD$ and $NH_3$ targets and are foreseen with 190 GeV/c $\pi^-$ beam on
polarized $NH_3$.
  The experimental results obtained by COMPASS for azimuthal effects in SIDIS
play an important role in the general understanding of the three-dimensional
nature of the nucleon and are widely used in theoretical analyses and global
data fits. Future first ever polarized DY-data from COMPASS compared with SIDIS
results will open a new chapter probing general principles of QCD
TMD-formalism.
  In this review main focus will be given to the very recent COMPASS results
obtained for SIDIS transverse spin asymmetries from four "Drell-Yan"
$Q^2$-ranges.

25
The categories of this paper are: patt-sol
33
The categories of this paper are: plasm-ph
32
The categories of this paper are: atom-ph
13
The categories of this paper are: quant-ph
3
The categories of this paper are: physics
4
The categories of this paper are: cond-mat
1
The categories of this paper are: cs
17
The categories of this paper are: q-fin
2
The categories of this paper are: math
12
The categories of this paper are: nucl-th
21
The categories of this paper are: adap-org
14
The categories of this paper are: math-ph
16
The categories of this paper are: stat
9
The categories of this paper are: nlin
24
The categories of this paper are: dg-ga
23
The categories of this paper are: solv-int