Speaker
Description
Recently, a hybrid scheme was proposed by the author and company to renormalize the quasi light-front correlations in the LaMET calculation of the PDFs. The hybrid scheme reduces the systematic uncertainty in the renormalization at distances where the leading-twist expansion or perturbation theory is expected to fail, so that one can have a better-controlled Fourier transform to the momentum space, and reliably extract the PDF through a large-momentum expansion in LaMET. In this talk, I will show the results from the analysis of existing lattice data with this hybrid scheme, and compare it to other schemes. We found that without making model assumptions of the PDF, the result is consistent with previous analyses in the moderate-x region, but have different qualitative behaviors in the small- and large-x regions, which is where the models are most sensitive to.
