Parton physics from large-momentum effective field theory (original) (raw)
ADS
Abstract
Parton physics, when formulated as light-front correlations, are difficult to study non-perturbatively, despite the promise of light-front quantization. Recently an alternative approach to partons have been proposed by re-visiting original Feynman picture of a hadron moving at asymptotically large momentum. Here I formulate the approach in the language of an effective field theory for a large hadron momentum P in lattice QCD, LaMET for short. I show that using this new effective theory, parton properties, including light-front parton wave functions, can be extracted from lattice observables in a systematic expansion of 1/P, much like that the parton distributions can be extracted from the hard scattering data at momentum scales of a few GeV.
Publication:
Science China Physics, Mechanics, and Astronomy
Pub Date:
July 2014
DOI:
arXiv:
Bibcode:
Keywords:
- partons;
- effective field theory;
- lattice QCD;
- high-energy scattering;
- proton structure;
- High Energy Physics - Phenomenology;
- High Energy Physics - Lattice;
- Nuclear Experiment;
- Nuclear Theory
E-Print:
10 pages, 1 fig. Science China, 2014