Conveners
Section 8: 分会场-2, Session 1
- 川 刘 ()
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...
We present an ongoing lattice QCD study of vector-meson light-cone distribution amplitude moments using gradient flow on the 2+1+1 flavor HISQ gauge ensembles generated by the MILC Collaboration. As a first step, we focus on the second moment of the φ-meson light-cone distribution amplitude, taking into account mixing among the relevant local operators. By comparing results at different flow...
We present a neural-network global analysis of transversity parton distributions and dihadron fragmentation functions using Belle, HERMES, COMPASS, and STAR measurements. The main new ingredient is an x-dependent lattice-QCD determination of isovector transversity, included directly at positive and negative x. It complements the limited experimental coverage and favors a larger positive...
Understanding how the spin, flavor, and intrinsic transverse motion of quarks emerge from QCD is essential for building a complete picture of nucleon structure. Recent developments in large-momentum effective theory have made it possible to access increasingly detailed partonic information directly from lattice QCD.
In this talk, I will present two complementary lattice studies of nucleon...
Baryon light-cone distribution amplitudes (LCDAs) encode the longitudinal momentum distributions of valence quarks and provide important nonperturbative inputs for hard exclusive processes involving baryons. In this talk, I will present the first lattice determination of the three leading-twist $\Lambda$-baryon LCDAs, $V$, $A$, and $T$, as full two-dimensional functions of the valence-quark...
We report a high precision calculation of the isospin vector charge $g_{S,T}$ of the nucleon using recently proposed "blending" method which provides a high-precision stochastic estimate of the all-to-all fermion propagator. A spin-$1/2$, isospin-$1/2$ projected current-involved basis element is utilized to reduce a particular nucleon-meson type excited state contamination whose coupling to...
