Collins and Sivers transverse-spin asymmetries in inclusive muoproduction of ρ0 mesons - INSPIRE

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Collins and Sivers transverse-spin asymmetries in inclusive muoproduction of ρ0 mesons

G.D. Alexeev
(
- Unlisted
)
,
M.G. Alexeev
(
- INFN, Turin and
- Turin U.
)
,
C. Alice
(
- INFN, Turin and
- Turin U.
)
,
A. Amoroso
(
- INFN, Turin and
- Turin U.
)
,
V. Andrieux
(
- Illinois U., Urbana
)

Oct 31, 2022

9 pages

Published in:

Phys.Lett.B 843 (2023) 137950

Published: Jun 16, 2023

e-Print:

2211.00093 [hep-ex]

DOI:

10.1016/j.physletb.2023.137950 (publication)

Report number:

CERN-EP-2022-234,
CERN-EP-2022--234

View in:

reference search10 citations

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Abstract: (Elsevier B.V.)

The production of vector mesons in deep inelastic scattering is an interesting yet scarcely explored channel to study the transverse spin structure of the nucleon and the spin-dependence of fragmentation. The COMPASS collaboration has performed the first measurement of the Collins and Sivers asymmetries for inclusively produced

ρ^{0}

mesons. The analysis is based on the data set collected in deep inelastic scattering in 2010 using a

160 GeV / c

μ^{+}

beam impinging on a transversely polarized

N H_{3}

target. The

ρ^{0}

mesons are selected from oppositely charged hadron pairs, and the asymmetries are extracted as a function of the Bjorken-x variable, the transverse momentum of the pair and the fraction of the energy z carried by the pair. Indications for positive Collins and Sivers asymmetries are observed.

SIDIS
Spin
Fragmentation
Collins asymmetry
Sivers asymmetry
muon: secondary beam
polarized target
polarization: transverse
nucleon: structure
vector meson: production

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