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Title: Proton tensor charges from a Poincaré-covariant Faddeev equation

Abstract

The proton’s tensor charges are calculated at leading order in a symmetry-preserving truncation of all matter-sector equations relevant to the associated bound-state and scattering problems. In particular, the nucleon three-body bound-state equation is solved without using a diquark approximation of the two-body scattering kernel. The computed charges are similar to those obtained in contemporary simulations of lattice-regularized quantum chromodynamics, an outcome which increases the tension between theory and phenomenology. Curiously, the theoretical calculations produce a value of the scale-invariant ratio (–δ Td/δ Tu) which matches that obtained in simple quark models, even though the individual charges are themselves different. As a result, the proton's tensor charges can be used to constrain extensions of the Standard Model using empirical limits on nucleon electric dipole moments.

Authors:
 [1];  [2];  [3];  [4]
  1. Sichuan Univ., Chengdu (People's Republic of China)
  2. Chongqing Univ., Chongqing (People's Republic of China)
  3. Argonne National Lab. (ANL), Argonne, IL (United States)
  4. Forschungszentrum Julich and JARA, Julich (Germany)
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26)
OSTI Identifier:
1477737
Alternate Identifier(s):
OSTI ID: 1471439
Grant/Contract Number:  
AC02-06CH11357
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review D
Additional Journal Information:
Journal Volume: 98; Journal Issue: 5; Journal ID: ISSN 2470-0010
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS

Citation Formats

Wang, Qing -Wu, Qin, Si -Xue, Roberts, Craig D., and Schmidt, Sebastian M. Proton tensor charges from a Poincaré-covariant Faddeev equation. United States: N. p., 2018. Web. doi:10.1103/PhysRevD.98.054019.
Wang, Qing -Wu, Qin, Si -Xue, Roberts, Craig D., & Schmidt, Sebastian M. Proton tensor charges from a Poincaré-covariant Faddeev equation. United States. doi:10.1103/PhysRevD.98.054019.
Wang, Qing -Wu, Qin, Si -Xue, Roberts, Craig D., and Schmidt, Sebastian M. Wed . "Proton tensor charges from a Poincaré-covariant Faddeev equation". United States. doi:10.1103/PhysRevD.98.054019. https://www.osti.gov/servlets/purl/1477737.
@article{osti_1477737,
title = {Proton tensor charges from a Poincaré-covariant Faddeev equation},
author = {Wang, Qing -Wu and Qin, Si -Xue and Roberts, Craig D. and Schmidt, Sebastian M.},
abstractNote = {The proton’s tensor charges are calculated at leading order in a symmetry-preserving truncation of all matter-sector equations relevant to the associated bound-state and scattering problems. In particular, the nucleon three-body bound-state equation is solved without using a diquark approximation of the two-body scattering kernel. The computed charges are similar to those obtained in contemporary simulations of lattice-regularized quantum chromodynamics, an outcome which increases the tension between theory and phenomenology. Curiously, the theoretical calculations produce a value of the scale-invariant ratio (–δTd/δTu) which matches that obtained in simple quark models, even though the individual charges are themselves different. As a result, the proton's tensor charges can be used to constrain extensions of the Standard Model using empirical limits on nucleon electric dipole moments.},
doi = {10.1103/PhysRevD.98.054019},
journal = {Physical Review D},
number = 5,
volume = 98,
place = {United States},
year = {2018},
month = {9}
}

Journal Article:
Free Publicly Available Full Text
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Cited by: 4 works
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