Azimuthal asymmetries of charged hadrons produced in high-energy muon scattering off longitudinally polarised deuterons

Abstract

Single hadron azimuthal asymmetries of positive and negative hadrons produced in muon semi-inclusive deep inelastic scattering off longitudinally polarised deuterons are determined using the 2006 COMPASS data and also combined all deuteron COMPASS data. For each hadron charge, the dependence of the azimuthal asymmetry on the hadron azimuthal angle $\varphi$ is obtained by means of a five-parameter fitting function that besides a $\varphi$-independent term includes four modulations predicted by theory: $\sin \varphi$, $\sin 2\varphi$, $\sin 3\varphi$ and $\cos \varphi$. The amplitudes of the five terms have been extracted, first, for the hadrons in the whole available kinematic region. In further fits, performed for hadrons from a restricted kinematic region, the $\varphi$-dependence is determined as a function of one of three variables (Bjorken-$x$, fractional energy of virtual photon taken by the outgoing hadron and hadron transverse momentum), while disregarding the others. Except the $\varphi$-independent term, all the modulation amplitudes are very small, and no clear kinematic dependence could be observed within experimental uncertainties.

arXiv comment15 pages, 5 figures

References in corpus (45)

• Fragmentation of Transversely Polarized Quarks Probed in Transverse Momentum Distributions
• Time-reversal odd distribution functions in leptoproduction
• The complete tree-level result up to order $1/Q$ for polarized deep-inelastic leptoproduction
• Semi-inclusive deep inelastic scattering at small transverse momentum
• Single-spin asymmetries in semi-inclusive deep-inelastic scattering on a transversely polarized hydrogen target
• The COMPASS Experiment at CERN
• The theory and phenomenology of polarized deep inelastic scattering
• Precise determination of the spin structure function ${\mathbf{g}}_1$ of the proton, deuteron and neutron
• First Measurement of the Transverse Spin Asymmetries of the Deuteron in Semi-Inclusive Deep Inelastic Scattering
• Observation of the Naive-T-odd Sivers Effect in Deep-Inelastic Scattering
• The Deuteron Spin-dependent Structure Function g1d and its First Moment
• Observation of a Single-Spin Azimuthal Asymmetry in Semi-Inclusive Pion Electro-Production
• Quark helicity distributions in the nucleon for up, down, and strange quarks from semi--inclusive deep--inelastic scattering
• Collins and Sivers asymmetries for pions and kaons in muon-deuteron DIS
• New Quark Distributions and Semi-Inclusive Electroproduction on Polarized Nucleons
• A new measurement of the Collins and Sivers asymmetries on a transversely polarised deuteron target
• Effects of transversity in deep-inelastic scattering by polarized protons
• On the analysis of lepton scattering on longitudinally or transversely polarized protons
• Single-spin Azimuthal Asymmetries in Electroproduction of Neutral Pions in Semi-inclusive Deep-inelastic Scattering
• The Spin-dependent Structure Function of the Proton g_1^p and a Test of the Bjorken Sum Rule
• Measurement of the Collins and Sivers asymmetries on transversely polarised protons
• Experimental investigation of transverse spin asymmetries in muon-p SIDIS processes: Sivers asymmetries
• The transverse momentum dependent distribution functions in the bag model
• Measurement of Beam-Spin Asymmetries for Deep Inelastic ${\pi }^{+}$ Electroproduction
• Measurement of the Spin Structure of the Deuteron in the DIS Region
• Measurement of the $x$- and $Q^2$-Dependence of the Asymmetry $A_1$ on the Nucleon
• Experimental investigation of transverse spin asymmetries in muon-p SIDIS processes: Collins asymmetries
• Collins and Sivers asymmetries in muonproduction of pions and kaons off transversely polarised proton
• Measurement of single-spin azimuthal asymmetries in semi-inclusive electroproduction of pions and kaons on a longitudinally polarised deuterium target
• Measurement of Single and Double Spin Asymmetries in Deep Inelastic Pion Electroproduction with a Longitudinally Polarized Target
• The Polarised Valence Quark Distribution from semi-inclusive DIS
• Transverse spin effects in hadron-pair production from semi-inclusive deep inelastic scattering
• Azimuthal distributions of charged hadrons, pions, and kaons produced in deep-inelastic scattering off unpolarized protons and deuterons
• Flavour Separation of Helicity Distributions from Deep Inelastic Muon-Deuteron Scattering
• Measurement of the Proton Spin Structure Function $g_1(x,Q^2)$ for $Q^2$ from 0.15 to 1.6 GeV${}^2$ with CLAS
• A high-statistics measurement of transverse spin effects in dihadron production from muon-proton semi-inclusive deep-inelastic scattering
• Measurement of azimuthal hadron asymmetries in semi-inclusive deep inelastic scattering off unpolarised nucleons
• Longitudinal quark polarization in transversely polarized nucleons
• Subleading-twist effects in single-spin asymmetries in semi-inclusive deep-inelastic scattering on a longitudinally polarized hydrogen target
• Are there approximate relations among transverse momentum dependent distribution functions?
• Transverse momentum dependence of the quark helicity distributions and the Cahn effect in double-spin asymmetry $A_{LL}$ in Semi Inclusive DIS
• Measurement of Inclusive Spin Structure Functions of the Deuteron
• Azimuthal asymmetries of charged hadrons produced by high-energy muons scattered off longitudinally polarised deuterons
• Single spin asymmetries in l p --> h X processes: a test of factorization
• Azimuthal asymmetries in SIDIS off unpolarized targets at COMPASS

Cited by in corpus (7)

• The Spin Structure of the Nucleon
• Semi-Inclusive Deep Inelastic Scattering in Wandzura-Wilczek-type approximation
• Longitudinal double-spin asymmetries in semi-inclusive deep-inelastic scattering of electrons and positrons by protons and deuterons
• First Extraction of Transverse Momentum Dependent Helicity Distributions
• T-odd proton-helicity asymmetry in semi-inclusive DIS in perturbative QCD
• Quark orbital angular momentum: can we learn about it from GPDs and TMDs?
• Studies of TMDs with CLAS