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Title: Experimental constraint on quark electric dipole moments

Journal Article · · Physical Review D

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.

Research Organization:
Duke Univ., Durham, NC (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
FG02-03ER41231
OSTI ID:
1433459
Alternate ID(s):
OSTI ID: 1498964
Journal Information:
Physical Review D, Journal Name: Physical Review D Vol. 97 Journal Issue: 7; ISSN 2470-0010
Publisher:
American Physical SocietyCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 16 works
Citation information provided by
Web of Science

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Cited By (2)

Nuclear electric dipole moment in the cluster model with a triton: Li 7 and B 11 journal November 2019
Electric dipole moment of Hg 199 atom from P , C P -odd electron-nucleon interaction journal April 2019

Figures / Tables (4)


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