Speaker
Dr
家璐 张
(Shanghai Jiao Tong University)
Description
The universality of the large momentum expansion allows computing parton distribution functions (PDFs) starting from any Euclidean correlator with appropriate large momentum Fourier
Components. Here we consider current-current correlators which have been used in short-distance
expansion to obtain moments of PDFs. The advantage of such correlators is that they have simple
renormalization properties and do not have linear power divergences as in quasi-PDF. However, in
lattice calculations, four-point functions are needed. Here we present an expansion formula with
current-current correlators up to the next-to-leading order, and preliminary numerical calculations
with four-point functions.
Primary authors
Dr
家璐 张
(Shanghai Jiao Tong University)
Prof.
Xiangdong Ji
(Tsung-Dao Lee Institute and School of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 201210, China)
Dr
Andreas Schäfer
(Institute for Theoretical Physics, University of Regensburg, 93040 Regensburg, Germany 4Center for Theoretical Physics - a Leinweber Institute)
Dr
Rui Zhang
(Center for Theoretical Physics - a Leinweber Institute, Massachusetts Institute of Technology, Cambridge, MA 02139, USA)
Dr
Christian Zimmermann
(Department of Physics and Astronomy, University of Kentucky, Lexington)
