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  • Accepted Manuscript: Neutron Electric Dipole Moment and Tensor Charges from Lattice QCD

Title: Neutron Electric Dipole Moment and Tensor Charges from Lattice QCD

In this paper, we present lattice QCD results on the neutron tensor charges including, for the first time, a simultaneous extrapolation in the lattice spacing, volume, and light quark masses to the physical point in the continuum limit. We find that the “disconnected” contribution is smaller than the statistical error in the “connected” contribution. Our estimates in the modified minimal subtraction scheme at 2 GeV, including all systematics, are g d-u T=1.020(76), g d T=0.774(66), g u T=-0.233(28), and g s T=0.008(9). The flavor diagonal charges determine the size of the neutron electric dipole moment (EDM) induced by quark EDMs that are generated in many new scenarios of CP violation beyond the standard model. Finally, we use our results to derive model-independent bounds on the EDMs of light quarks and update the EDM phenomenology in split supersymmetry with gaugino mass unification, finding a stringent upper bound of d n<4×10 -28 e cm for the neutron EDM in this scenario.
Authors:
 [1] ;  [1] ;  [1] ;  [2] ;  [1]
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  1. Los Alamos National Lab. (LANL), Los Alamos, NM (United States). Theoretical Division
  2. Univ. of California, Berkeley, CA (United States). Physics Dept.
Publication Date:
Report Number(s):
LA-UR-15-24210
Journal ID: ISSN 0031-9007
Grant/Contract Number:
AC52-06NA25396; AC02-05CH11231; KA-1401020; FG02-97ER4014; ACI-1053575
Type:
Accepted Manuscript
Journal Name:
Physical Review Letters
Additional Journal Information:
Journal Volume: 115; Journal Issue: 21; Journal ID: ISSN 0031-9007
Publisher:
American Physical Society (APS)
Research Org:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org:
USDOE Laboratory Directed Research and Development (LDRD) Program; USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25); National Science Foundation (NSF)
Contributing Orgs:
PNDME Collaboration; Univ. of California, Berkeley, CA (United States)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; atomic and nuclear physics; nucleon charges; disconnected quark loops; quark EDM; split SUSY
OSTI Identifier:
1329864
Alternate Identifier(s):
OSTI ID: 1226378
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