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Valence-Quark Distribution of the Kaon and Pion from Lattice QCD

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arxiv 2003.14128 v2 pith:LM2HLNDD submitted 2020-03-31 hep-lat hep-phnucl-th

Valence-Quark Distribution of the Kaon and Pion from Lattice QCD

Huey-Wen Lin , Jiunn-Wei Chen , Zhouyou Fan , Jian-Hui Zhang , Rui Zhang This is my paper
classification hep-lat hep-phnucl-th
keywords distributionkaonpionvalence-quarkcalculationlatticeagreesapproach
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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We present the first lattice-QCD calculation of the kaon valence-quark distribution functions using the large-momentum effective theory (LaMET) approach. The calculation is performed with multiple pion masses with the lightest one around 220 MeV, 2 lattice spacings $a=0.06$ and 0.12 fm, $(M_\pi)_\text{min} L \approx 5.5$, and high statistics ranging from 11,600 to 61,312 measurements. We also calculate the valence-quark distribution of pion and find it to be consistent with the FNAL E615 experimental results, and our ratio of the $u$ quark PDF in the kaon to that in the pion agrees with the CERN NA3 experiment. We also make predictions of the strange-quark distribution of the kaon.

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Cited by 4 Pith papers

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  1. Mellin Moments of Pion and Kaon Unpolarized PDFs from Nonlocal Operators in Lattice QCD

    hep-lat 2026-06 unverdicted novelty 6.0

    First lattice QCD results for Mellin moments of pion and kaon unpolarized PDFs from nonlocal operator matrix elements on a 32^3×64 twisted-mass ensemble at m_π=260 MeV, extracted at NNLO and μ=2 GeV.

  2. Pion and Kaon PDFs from Lattice QCD via Large Momentum Effective Theory and Short-Distance Factorization

    hep-lat 2025-12 conditional novelty 5.0

    Lattice QCD calculation of pion and kaon unpolarized quark PDFs on a 32^3×64 ensemble with 260 MeV pion mass, using LaMET and SDF matching at boosts up to 2.07 GeV.

  3. Effects of flavor-mixings on charged kaon and pion parton distribution functions

    hep-ph 2026-07 conditional novelty 4.0

    Vacuum-polarization flavor mixing in the U(3) NJL model produces small, mass-difference-driven shifts in charged pion and kaon valence PDFs that mildly improve agreement with data at 4 and 27 GeV².

  4. Hadron Structure from lattice QCD in the context of the Electron-Ion Collider

    hep-lat 2026-03 unverdicted novelty 2.0

    Lattice QCD now delivers high-precision results on hadron internal structure that directly support the scientific program of the Electron-Ion Collider.