Sivers function of sea quarks in the light-cone model

Abstract

We calculate the Sivers function of $\bar{u}$ and $\bar{d}$ quarks using the overlap representation within the light-cone formalism. The light-cone wave functions of the proton is obtained in terms of the $|\bar{q}qB⟩$ Fock states motivated by the meson-baryon fluctuation model. We consider the final-state interaction at the level of one gluon exchange. In a simplified scenario, the Sivers function of $\bar{u}$ and $\bar{d}$ can be expressed as the convolution of the Sivers function of the pion inside the proton and the unpolarized distribution of $\bar{q}$ inside the pion. The model parameters are fixed by fitting the unpolarized sea quark distributions to the known parameterizations. We present the numerical results for $f_1^{\perp \bar{u}/p}(x,{\mathbf{k}}_T^2)$ and $f_1^{\perp \bar{d}/p}(x,{\mathbf{k}}_T^2)$. The first transverse moment of the sea quark Sivers functions in our model are find to be negative and the magnitude is about 0.004 at most.

arXiv comment9 pages, figures

References in corpus (36)

• Parton distributions for the LHC
• Leading-twist Single-transverse-spin asymmetries: Drell-Yan and Deep-Inelastic Scattering
• Final-State Interactions and Single-Spin Asymmetries in Semi-Inclusive Deep Inelastic Scattering
• Initial-State Interactions and Single-Spin Asymmetries in Drell-Yan Processes
• Light-Cone Representation of the Spin and Orbital Angular Momentum of Relativistic Composite Systems
• Relations between generalized and transverse momentum dependent parton distributions
• Transverse-momentum distributions in a diquark spectator model
• Sivers Effect for Pion and Kaon Production in Semi-Inclusive Deep Inelastic Scattering
• Light-Cone Wavefunction Representation of Deeply Virtual Compton Scattering
• Collins and Sivers asymmetries for pions and kaons in muon-deuteron DIS
• Single Spin Asymmetries in Charged Pion Production from Semi-Inclusive Deep Inelastic Scattering on a Transversely Polarized ${}^3$He Target
• The Quark/Antiquark Asymmetry of the Nucleon Sea
• QCD Evolution of the Sivers Asymmetry
• Single-Transverse Spin Asymmetries: From DIS to Hadronic Collisions
• Measurement of the Collins and Sivers asymmetries on transversely polarised protons
• Experimental investigation of transverse spin asymmetries in muon-p SIDIS processes: Sivers asymmetries
• First measurement of transverse-spin-dependent azimuthal asymmetries in the Drell-Yan process
• Sivers function in a spectator model with axial-vector diquarks
• Sivers Function in the MIT Bag Model
• Novel Phenomenology of Parton Distributions from the Drell-Yan Process
• Study of the sign change of the Sivers function from STAR Collaboration W/Z production data
• Collins fragmentation function for pions and kaons in a spectator model
• Sivers and Boer-Mulders functions in Light-Cone Quark Models
• Sivers effect in Drell-Yan processes
• The Nucleon's Virtual Meson Cloud and Deep Inelastic Lepton Scattering
• Reviewing model calculations of the Collins fragmentation function
• Non-zero transversity distribution of the pion in a quark-spectator-antiquark model
• Estimate of the Collins fragmentation function in a chiral invariant approach
• Test the time-reversal modified universality of the Sivers function
• A quark model analysis of the Sivers function
• Sivers asymmetry extracted in SIDIS at the hard scale of the Drell-Yan process at COMPASS
• Model calculations of the Sivers function satisfying the Burkardt Sum Rule
• Pion-photon and photon-pion transition form factors in light-cone formalism
• Assessing signals of TMD physics in SIDIS azimuthal asymmetries and in the extraction of the Sivers function
• Sea quark Sivers distribution
• Sigma Meson Cloud and Proton's Light Flavor Sea Quarks

Cited by in corpus (2)

• Several Topics on Transverse Momentum-Dependent Fragmentation Functions
• Generalized parton distributions of sea quark at zero skewness in the light-cone Model