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Title Partonic angular momentum in the nucleon's chiral periphery
Authors Carlos Granados,Christian Weiss
JLAB number JLAB-THY-19-2928
LANL number arXiv:1905.02742
Other number DOE/OR/23177-4730
Document Type(s) (Journal Article) 
Supported by U.S. Naval Research: No
Supported by Jefferson Lab LDRD Funding: No
Funding Source: Nuclear Physics (NP)

Compiled for Physics Letters B
Volume 797
Page(s) 134847
Publication Abstract: We study the nucleon's partonic angular momentum (AM) content at peripheral transverse distances b = O(M_pi^{-1}), where the structure is governed by chiral dynamics. We compute the nucleon form factors of the energy-momentum tensor in chiral effective field theory (ChEFT) and construct the transverse densities of AM at fixed light-front time. In the periphery the spin density is suppressed, and the AM is predominantly orbital. In the first-quantized representation of ChEFT in light-front form, the field-theoretical AM density coincides with the quantum-mechanical orbital AM density of the soft pions in the nucleon's periphery.
Experiment Numbers: other
Document: pdf
Accepted Manuscript: 1-s2.0-S0370269319305611-main.pdf
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