Rui Zhang

Proton isovector helicity PDF at NNLO and the twist-3 moment d ˜ 2 from lattice QCD at physical quark masses

Xiang Gao, Andrew D. Hanlon, Swagato Mukherjee, Péter Petreczky et autres

We present a lattice quantum chromodynamics calculation of the x -dependent isovector quark helicity parton distribution function (PDF) of the proton in the large momentum effective theory (LaMET) framework. Through operator product expansion (OPE) we also extract the d ˜ 2 moment …

us, cn (code pays fourni par la source)

Large-momentum effective theory’s asymptotic extrapolation vs the inverse problem

Anonymous, Xiang Gao, J. He, Jun Hua et autres

Large-momentum effective theory is a physics-guided systematic expansion to calculate light-cone parton distributions, including collinear (PDFs) and transverse-momentum-dependent ones, at any fixed momentum fraction <a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"> <a:mi>x</a:mi> </a:math> within a range of <c:math xmlns:c="http://www.w3.org/1998/Math/MathML" display="inline"> <c:mo stretchy="false">[</c:mo> <c:msub> <c:mi>x</c:mi> <c:mi>min</c:mi> </c:msub> …

tw, us, cn, de, ps, hk (code pays fourni par la source)

Kinematically enhanced interpolating operators for boosted hadrons

Rui Zhang, Anthony V. Grebe, Daniel C. Hackett, Michael L. Wagman

We propose to use interpolating operators for lattice quantum chromodynamics calculations of highly boosted pions and nucleons with kinematically enhanced ground-state overlap factors at large momentum. Because this kinematic enhancement applies to the signal but not the variance of the correlation function, …

us (code pays fourni par la source)

Resummation for lattice QCD calculation of generalized parton distributions at nonzero skewness

Jack Holligan, Huey-Wen Lin, Rui Zhang, Yong Zhao

A bstract Large-momentum effective theory (LaMET) provides an approach to directly calculate the x -dependence of generalized parton distributions (GPDs) on a Euclidean lattice through power expansion and a perturbative matching. When a parton’s momentum becomes soft, the corresponding logarithms in the …

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Effects of threshold resummation for large-x PDF in large momentum effective theory

Xiangdong Ji, Yizhuang Liu, Yushan Su, Rui Zhang

A bstract Parton distribution functions (PDFs) at large x are challenging to extract from experimental data, yet they are essential for understanding hadron structure and searching for new physics beyond the Standard Model. Within the framework of the large momentum P z …

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Resummation for Lattice QCD Calculation of Generalized Parton Distributions at Nonzero Skewness

Jack Holligan, Huey-Wen Lin, Rui Zhang, Yong Zhao

Large-momentum effective theory (LaMET) provides an approach to directly calculate the $x$-dependence of generalized parton distributions (GPDs) on a Euclidean lattice through power expansion and a perturbative matching. When a parton's momentum becomes soft, the corresponding logarithms in the matching kernel become …

Lattice QCD calculation of x -dependent meson distribution amplitudes at physical pion mass with threshold logarithm resummation

Ian C. Cloët, Xiang Gao, Swagato Mukherjee, Sergey Syritsyn et autres

We present a lattice quantum chromodynamics (QCD) calculation of the x -dependent pion and kaon distribution amplitudes (DA) in the framework of large momentum effective theory. This calculation is performed on a fine lattice of a = 0.076 fm at physical pion …

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QCD Predictions for Meson Electromagnetic Form Factors at High Momenta: Testing Factorization in Exclusive Processes

Heng-Tong Ding, Xiang Gao, Andrew D. Hanlon, Swagato Mukherjee et autres

We report the first lattice QCD computation of pion and kaon electromagnetic form factors, F_{M}(Q^{2}), at large momentum transfer up to 10 and 28 GeV^{2}, respectively. Utilizing physical masses and two fine lattices, we achieve good agreement with JLab experimental results at …

cn, us (code pays fourni par la source)

Lattice QCD calculation of the pion distribution amplitude with domain wall fermions at physical pion mass

Ethan Baker, Dennis Bollweg, Ian C. Cloët, Xiang Gao et autres

A bstract We present a direct lattice QCD calculation of the x -dependence of the pion distribution amplitude (DA), which is performed using the quasi-DA in large momentum effective theory on a domain-wall fermion ensemble at physical quark masses and spacing a …

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Lattice QCD Calculation of $x$-dependent Meson Distribution Amplitudes at Physical Pion Mass with Threshold Logarithm Resummation

Ian C. Cloët, Xiang Gao, Swagato Mukherjee, Sergey Syritsyn et autres

We present a lattice quantum chromodynamics (QCD) calculation of the $x$-dependent pion and kaon distribution amplitudes (DA) in the framework of large momentum effective theory. This calculation is performed on a fine lattice of $a=0.076$ fm at physical pion mass, with the …

QCD Predictions for Meson Electromagnetic Form Factors at High Momenta: Testing Factorization in Exclusive Processes

Heng-Tong Ding, Xiang Gao, Andrew D. Hanlon, Swagato Mukherjee et autres

We report the first lattice QCD computation of pion and kaon electromagnetic form factors, $F_M(Q^2)$, at large momentum transfer up to 10 and 28 $\mathrm{GeV}^2$, respectively. Utilizing physical masses and two fine lattices, we achieve good agreement with JLab experimental results at …

Leading power accuracy in lattice calculations of parton distributions

Rui Zhang, Jack Holligan, Xiangdong Ji, Yushan Su

In lattice-QCD calculations of parton distribution functions (PDFs) via large-momentum effective theory, the leading power (twist-three) correction appears as O(ΛQCD/Pz) due to the linear-divergent self-energy of Wilson line in quasi-PDF operators. For lattice data with hadron momentum Pz of a few GeV, …

us (code pays fourni par la source)