Neutron Electric Dipole Moment and Tensor Charges from Lattice QCD
Abstract
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 gd-uT=1.020(76), gdT=0.774(66), guT=-0.233(28), and gsT=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 dn<4×10-28 e cm for the neutron EDM in this scenario.
- Authors:
-
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States). Theoretical Division
- Univ. of California, Berkeley, CA (United States). Physics Dept.
- Publication Date:
- 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); National Science Foundation (NSF)
- Contributing Org.:
- PNDME Collaboration; Univ. of California, Berkeley, CA (United States)
- OSTI Identifier:
- 1329864
- Alternate Identifier(s):
- OSTI ID: 1226378
- 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
- Resource 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)
- 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
Citation Formats
Bhattacharya, Tanmoy, Cirigliano, Vincenzo, Gupta, Rajan, Lin, Huey-Wen, and Yoon, Boram. Neutron Electric Dipole Moment and Tensor Charges from Lattice QCD. United States: N. p., 2015.
Web. doi:10.1103/PhysRevLett.115.212002.
Bhattacharya, Tanmoy, Cirigliano, Vincenzo, Gupta, Rajan, Lin, Huey-Wen, & Yoon, Boram. Neutron Electric Dipole Moment and Tensor Charges from Lattice QCD. United States. doi:10.1103/PhysRevLett.115.212002.
Bhattacharya, Tanmoy, Cirigliano, Vincenzo, Gupta, Rajan, Lin, Huey-Wen, and Yoon, Boram. Tue .
"Neutron Electric Dipole Moment and Tensor Charges from Lattice QCD". United States. doi:10.1103/PhysRevLett.115.212002. https://www.osti.gov/servlets/purl/1329864.
@article{osti_1329864,
title = {Neutron Electric Dipole Moment and Tensor Charges from Lattice QCD},
author = {Bhattacharya, Tanmoy and Cirigliano, Vincenzo and Gupta, Rajan and Lin, Huey-Wen and Yoon, Boram},
abstractNote = {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 gd-uT=1.020(76), gdT=0.774(66), guT=-0.233(28), and gsT=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 dn<4×10-28 e cm for the neutron EDM in this scenario.},
doi = {10.1103/PhysRevLett.115.212002},
journal = {Physical Review Letters},
number = 21,
volume = 115,
place = {United States},
year = {2015},
month = {11}
}
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