8 papers
Towards studying the structural differences between the pion and its radial excitation
Xiang Gao, Nikhil Karthik, Swagato Mukherjee +3
We present an exploratory lattice QCD investigation of the differences between the valence quark structure of pion and its radial excitation in a fixed finite volume usin…
Origin and Resummation of Threshold Logarithms in the Lattice QCD Calculations of PDFs
Xiang Gao, Kyle Lee, Swagato Mukherjee +2
Many present lattice QCD approaches to calculate the parton distribution functions (PDFs) rely on a factorization formula or effective theory expansion of certain Euclidean matrix…
Valence parton distribution of pion from lattice QCD: Approaching continuum
Xiang Gao, Luchang Jin, Christos Kallidonis +6
We present a high-statistics lattice QCD determination of the valence parton distribution function (PDF) of the pion, with a mass of 300 MeV, using two very fine lattice spacings o…
Isovector parton distribution functions of the proton on a superfine lattice
Zhouyou Fan, Xiang Gao, Ruizi Li +7
We study isovector unpolarized and helicity parton distribution functions (PDF) of the proton within the framework of Large Momentum Effective Theory. We use a gauge ensemble, gene…
Theory of Subcycle Linear Momentum Transfer in Strong-Field Tunneling Ionization
Hongcheng Ni, Simon Brennecke, Xiang Gao +8
Interaction of a strong laser pulse with matter transfers not only energy but also linear momentum of the photons. Recent experimental advances have made it possible to detect the…
Pion valence quark PDF from lattice QCD
Charles Shugert, Xiang Gao, Taku Izubichi +7
We present lattice results on the valence-quark structure of the pion using a coordinate space method within the framework of Large Momentum Effective Theory (LaMET). In this metho…