Proton tensor charges from a Poincaré-covariant Faddeev equation

Wang, Qing -Wu; Qin, Si -Xue; Roberts, Craig D.; Schmidt, Sebastian M.

doi:10.1103/PhysRevD.98.054019

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

Journal Article · Wed Sep 19 00:00:00 EDT 2018 · Physical Review D

DOI:https://doi.org/10.1103/PhysRevD.98.054019· OSTI ID:1477737

Wang, Qing -Wu ^[1]; Qin, Si -Xue ^[2]; Roberts, Craig D. ^[3]; Schmidt, Sebastian M. ^[4]

Sichuan Univ., Chengdu (People's Republic of China)
Chongqing Univ., Chongqing (People's Republic of China)
Argonne National Lab. (ANL), Argonne, IL (United States)
Forschungszentrum Julich and JARA, Julich (Germany)

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.

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Research Organization:: Argonne National Laboratory (ANL), Argonne, IL (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Nuclear Physics (NP)

Grant/Contract Number:: AC02-06CH11357

OSTI ID:: 1477737

Alternate ID(s):: OSTI ID: 1471439

Journal Information:: Physical Review D, Vol. 98, Issue 5; ISSN 2470-0010

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 31 works

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Nonperturbative structure of the quark-gluon vertex Skullerud, J. I.; Bowman, P. O.; Kizilersu, A. arXiv https://doi.org/10.48550/arxiv.hep-ph/0303176	text	January 2003
Electric dipole moments as probes of new physics Pospelov, Maxim; Ritz, Adam arXiv https://doi.org/10.48550/arxiv.hep-ph/0504231	text	January 2005
Dyson-Schwinger Equations and the Application to Hadronic Physics Roberts, C. D.; Williams, A. G. arXiv https://doi.org/10.48550/arxiv.hep-ph/9403224	text	January 1994
Effective masses of diquarks Maris, P. arXiv https://doi.org/10.48550/arxiv.nucl-th/0204020	text	January 2002

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Practical scheme from QCD to phenomena via Dyson-Schwinger equations Tang, Can; Gao, Fei; Liu, Yu-xin Physical Review D, Vol. 100, Issue 5 https://doi.org/10.1103/physrevd.100.056001	journal	September 2019
Practical scheme from QCD to phenomena via Dyson-Schwinger equations Tang, Can; Gao, Fei; Liu, Yu-xin arXiv https://doi.org/10.48550/arxiv.1902.01679	text	January 2019
Symmetry, symmetry breaking, and pion parton distributions Ding, Minghui; Raya, Khepani; Binosi, Daniele arXiv https://doi.org/10.48550/arxiv.1905.05208	text	January 2019
Elastic electromagnetic form factors of vector mesons Xu, Yin-Zhen; Binosi, Daniele; Cui, Zhu-Fang arXiv https://doi.org/10.48550/arxiv.1911.05199	text	January 2019