Light-cone distribution amplitudes of a light baryon in large-momentum effective theory

A bstract Momentum distributions of quarks/gluons inside a light baryon in a hard exclusive process are encoded in the light-cone distribution amplitudes (LCDAs). In this work, we point out that the leading twist LCDAs of a light baryon can be obtained through a simulation of a quasi-distribution am...

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Bibliographic Details
Published in:The journal of high energy physics 2023-07, Vol.2023 (7), p.191-24, Article 191
Main Authors: Deng, Zhi-Fu, Han, Chao, Wang, Wei, Zeng, Jun, Zhang, Jia-Lu
Format: Article
Language:English
Subjects:
Amplitudes
Baryons
Classical and Quantum Gravitation
Cosmology
Effective Field Theories of QCD
Elementary Particles
Factorization
First principles
Gluons
High energy physics
Higher-Order Perturbative Calculations
Light
Mathematical analysis
Momentum
Parton Distributions
Physics
Physics and Astronomy
Quantum chromodynamics
Quantum Field Theories
Quantum Field Theory
Quantum Physics
Quarks
Regular Article - Theoretical Physics
Regularization
Relativity Theory
Renormalization Group
String Theory
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Summary:A bstract Momentum distributions of quarks/gluons inside a light baryon in a hard exclusive process are encoded in the light-cone distribution amplitudes (LCDAs). In this work, we point out that the leading twist LCDAs of a light baryon can be obtained through a simulation of a quasi-distribution amplitude calculable on lattice QCD within the framework of the large-momentum effective theory. We calculate the one-loop perturbative contributions to LCDA and quasi-distribution amplitudes and explicitly demonstrate the factorization of quasi-distribution amplitudes at the one-loop level. Based on the perturbative results, we derive the matching kernel in the MS ¯ scheme and regularization-invariant momentum-subtraction scheme. Our result provides a first step to obtaining the LCDA from first principle lattice QCD calculations in the future.
ISSN:1029-8479
1029-8479
DOI:10.1007/JHEP07(2023)191