Experimental constraint on quark electric dipole moments
Abstract
The electric dipole moments (EDMs) of nucleons are sensitive probes of additional C P violation sources beyond the standard model to account for the baryon number asymmetry of the universe. As a fundamental quantity of the nucleon structure, tensor charge is also a bridge that relates nucleon EDMs to quark EDMs. With a combination of nucleon EDM measurements and tensor charge extractions, we investigate the experimental constraint on quark EDMs, and its sensitivity to C P violation sources from new physics beyond the electroweak scale. We obtain the current limits on quark EDMs as 1.27 × 10-24 e ∙ cm for the up quark and 1.17 × 10-24 $$e$$ ∙ cm for the down quark at the scale of 4 GeV2 . We also study the impact of future nucleon EDM and tensor charge measurements, and show that upcoming new experiments will improve the constraint on quark EDMs by about 3 orders of magnitude leading to a much more sensitive probe of new physics models.
- Authors:
- Publication Date:
- Research Org.:
- Duke Univ., Durham, NC (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1433459
- Alternate Identifier(s):
- OSTI ID: 1498964
- Grant/Contract Number:
- FG02-03ER41231
- Resource Type:
- Published Article
- Journal Name:
- Physical Review D
- Additional Journal Information:
- Journal Name: Physical Review D Journal Volume: 97 Journal Issue: 7; Journal ID: ISSN 2470-0010
- Publisher:
- American Physical Society
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
Citation Formats
Liu, Tianbo, Zhao, Zhiwen, and Gao, Haiyan. Experimental constraint on quark electric dipole moments. United States: N. p., 2018.
Web. doi:10.1103/PhysRevD.97.074018.
Liu, Tianbo, Zhao, Zhiwen, & Gao, Haiyan. Experimental constraint on quark electric dipole moments. United States. https://doi.org/10.1103/PhysRevD.97.074018
Liu, Tianbo, Zhao, Zhiwen, and Gao, Haiyan. Tue .
"Experimental constraint on quark electric dipole moments". United States. https://doi.org/10.1103/PhysRevD.97.074018.
@article{osti_1433459,
title = {Experimental constraint on quark electric dipole moments},
author = {Liu, Tianbo and Zhao, Zhiwen and Gao, Haiyan},
abstractNote = {The electric dipole moments (EDMs) of nucleons are sensitive probes of additional C P violation sources beyond the standard model to account for the baryon number asymmetry of the universe. As a fundamental quantity of the nucleon structure, tensor charge is also a bridge that relates nucleon EDMs to quark EDMs. With a combination of nucleon EDM measurements and tensor charge extractions, we investigate the experimental constraint on quark EDMs, and its sensitivity to C P violation sources from new physics beyond the electroweak scale. We obtain the current limits on quark EDMs as 1.27 × 10-24 e ∙ cm for the up quark and 1.17 × 10-24 $e$ ∙ cm for the down quark at the scale of 4 GeV2 . We also study the impact of future nucleon EDM and tensor charge measurements, and show that upcoming new experiments will improve the constraint on quark EDMs by about 3 orders of magnitude leading to a much more sensitive probe of new physics models.},
doi = {10.1103/PhysRevD.97.074018},
journal = {Physical Review D},
number = 7,
volume = 97,
place = {United States},
year = {2018},
month = {4}
}
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https://doi.org/10.1103/PhysRevD.97.074018
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Cited by: 3 works
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Figures / Tables:
FIG. 1. : Tensor charge results. The left panel shows the values of u and d quark tensor charges, and the right panel shows the values of the isovector tensor charge. The round (green) points are from Dyson-Schwinger equation calculations [31,44], the square (blue) points are from lattice QCD calculationsmore »
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