Science China Physics, Mechanics & Astronomy

, Volume 57, Issue 7, pp 1407–1412 | Cite as

Parton physics from large-momentum effective field theory

  • XiangDong Ji


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.


partons effective field theory lattice QCD high-energy scattering proton structure 


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© Science China Press and Springer-Verlag Berlin Heidelberg 2014

Authors and Affiliations

  1. 1.INPAC, Department of Physics and AstronomyShanghai Jiao Tong UniversityShanghaiChina
  2. 2.Maryland Center for Fundamental Physics, Department of PhysicsUniversity of MarylandCollege ParkUSA

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