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Title: Partonic angular momentum in the nucleon's chiral periphery

Abstract

We review the nucleon's partonic angular momentum (AM) content at peripheral transverse distances $$\mathcal{b = O(M_{\pi}^{-1})}$$, 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.

Authors:
ORCiD logo [1];  [2]
  1. George Washington Univ., Washington, DC (United States)
  2. Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
Publication Date:
Research Org.:
Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26)
OSTI Identifier:
1549015
Alternate Identifier(s):
OSTI ID: 1557639
Report Number(s):
JLAB-THY-19-2928; DOE/OR/-23177-4730; arXiv:1905.02742
Journal ID: ISSN 0370-2693
Grant/Contract Number:  
AC05-06OR23177
Resource Type:
Journal Article: Published Article
Journal Name:
Physics Letters. Section B
Additional Journal Information:
Journal Volume: 797; Journal Issue: C; Journal ID: ISSN 0370-2693
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; Nucleon spin decomposition; Generalized parton distributions; Energy-momentum tensor; Orbital angular momentum; Chiral effective field theory; Light-front quantization

Citation Formats

Granados, C., and Weiss, C. Partonic angular momentum in the nucleon's chiral periphery. United States: N. p., 2019. Web. doi:10.1016/j.physletb.2019.134847.
Granados, C., & Weiss, C. Partonic angular momentum in the nucleon's chiral periphery. United States. doi:10.1016/j.physletb.2019.134847.
Granados, C., and Weiss, C. Fri . "Partonic angular momentum in the nucleon's chiral periphery". United States. doi:10.1016/j.physletb.2019.134847.
@article{osti_1549015,
title = {Partonic angular momentum in the nucleon's chiral periphery},
author = {Granados, C. and Weiss, C.},
abstractNote = {We review the nucleon's partonic angular momentum (AM) content at peripheral transverse distances $\mathcal{b = O(M_{\pi}^{-1})}$, 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.},
doi = {10.1016/j.physletb.2019.134847},
journal = {Physics Letters. Section B},
issn = {0370-2693},
number = C,
volume = 797,
place = {United States},
year = {2019},
month = {8}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record at 10.1016/j.physletb.2019.134847

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