Jun 5 – 9, 2023
Genova, Italy
Europe/Rome timezone

Sivers function of sea quarks in the light-cone model

Not scheduled
DAD - Room 4H (Genova, Italy)

DAD - Room 4H

Genova, Italy

Contributed QCD and hadron structure Exotic hadrons and candidates


Xiaoyan Luan (Southeast University)


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 are obtained in terms of the $|q\bar{q}B\rangle$ 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 $f_{1T}^{\bar{u}/P}(x,\boldsymbol{k}^2_T)$ and $f_{1T}^{\bar{d}/P}(x,\boldsymbol{k}^2_T)$. 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.

Primary author

Xiaoyan Luan (Southeast University)

Presentation materials