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The 43rd International Symposium on Lattice Field Theory (Lattice 2026)

26 July 2026 to 1 August 2026
University of Maryland, College Park
US/Eastern timezone

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Moments of pion and kaon light-cone distribution amplitudes from dynamical lattice QCD using the heavy-quark operator product expansion

27 Jul 2026, 16:50
20m
Benjamin Banneker A (Adele H. Stamp Student Union)

Benjamin Banneker A

Adele H. Stamp Student Union

3972 Campus Dr, College Park, MD 20742
Contributed talk Structure of hadrons and nuclei Structure of hadrons and nuclei

Speaker

S.-P. Alex Chang (Institute of Physics, National Yang Ming Chiao Tung University)

Description

The light-cone distribution amplitude (LCDA) is a non-perturbative quantity for understanding hadron structure and exclusive scattering processes. We present our calculation of moments of the pion and kaon LCDAs using the heavy-quark operator product expansion (HOPE) framework. This method employs an OPE analysis of hadronic amplitudes through the inclusion of a fictitious valence heavy quark.

Our previous work has successfully applied this framework to determine the second and fourth Mellin moments of the pion LCDA in the quenched approximation. In this work, we extend the application of HOPE to dynamical lattice QCD calculations using CLS ensembles. We present preliminary results for the first three nontrivial Mellin moments of the kaon LCDA and the second moment of the pion LCDA. These results demonstrate the feasibility of the HOPE method for accessing higher moments of meson LCDAs from dynamical lattice QCD.

Authors

Dr Anthony V. Grebe (Department of Physics and Maryland Center for Fundamental Physics, University of Maryland,) Prof. C.-J. David Lin (Institute of Physics, National Yang Ming Chiao Tung University) Dr Issaku Kanamori (R-CCS, RIKEN) Matias Gutiérrez-Escobari (Center for Theoretical Physics - A Leinweber Institute, Massachusetts Institute of Technology) Dr Robert J. Perry (Center for Theoretical Physics - A Leinweber Institute, Massachusetts Institute of Technology) S.-P. Alex Chang (Institute of Physics, National Yang Ming Chiao Tung University) Prof. William Detmold (Center for Theoretical Physics - A Leinweber Institute, Massachusetts Institute of Technology) Dr Yong Zhao (Physics Division, Argonne National Laboratory)

Presentation materials

HOPE_lattice26.pdf