Neutron Electric Dipole Moment and Tensor Charges from Lattice QCD

Bhattacharya, Tanmoy; Cirigliano, Vincenzo; Gupta, Rajan; Lin, Huey-Wen; Yoon, Boram

doi:10.1103/PhysRevLett.115.212002

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

Journal Article · Tue Nov 17 00:00:00 EST 2015 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.115.212002· OSTI ID:1329864

Bhattacharya, Tanmoy ^[1]; Cirigliano, Vincenzo ^[1]; Gupta, Rajan ^[1]; Lin, Huey-Wen ^[2]; Yoon, Boram ^[1]

Los Alamos National Lab. (LANL), Los Alamos, NM (United States). Theoretical Division
Univ. of California, Berkeley, CA (United States). Physics Dept.

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.

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Research Organization:: Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

Sponsoring Organization:: USDOE Laboratory Directed Research and Development (LDRD) Program; USDOE Office of Science (SC), High Energy Physics (HEP); National Science Foundation (NSF)

Contributing Organization:: PNDME Collaboration; Univ. of California, Berkeley, CA (United States)

Grant/Contract Number:: AC52-06NA25396; AC02-05CH11231; KA-1401020; FG02-97ER4014; ACI-1053575

OSTI ID:: 1329864

Alternate ID(s):: OSTI ID: 1226378

Report Number(s):: LA-UR-15-24210

Journal Information:: Physical Review Letters, Vol. 115, Issue 21; ISSN 0031-9007

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 92 works

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