Neutron Electric Dipole Moment and Tensor Charges from Lattice QCD

doi:10.1103/PhysRevLett.115.212002

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

Article Details
Other Related Research

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:

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.

Publication Date:: 2015-11-17

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


                    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.,  
        Web.  doi:10.1103/PhysRevLett.115.212002.

Copy to clipboard


                    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.

Copy to clipboard


                    Bhattacharya, Tanmoy, Cirigliano, Vincenzo, Gupta, Rajan, Lin, Huey-Wen, and Yoon, Boram. 2015.  
        "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.

Copy to clipboard


                    
@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}

}

Copy to clipboard

Free Publicly Accessible Full Text
Accepted Manuscript (Publisher)
Accepted Manuscript (DOE)
Publisher's Version of Record
10.1103/PhysRevLett.115.212002
https://doi.org/10.1103/PhysRevLett.115.212002

Citation Metrics
Cited by: 31works
Citation information provided by
Web of Science

Save / Share this Record
Export Metadata
- Endnote
- RIS
- Excel
- CSV
- XML
Save to My Library
Send to Email

Send to Email

Email address:

Content:

Similar Records

Similar records in DOE PAGES and OSTI.GOV collections:

Neutron Electric Dipole Moment and Tensor Charges from Lattice QCD

Journal Article Bhattacharya, Tanmoy ; Cirigliano, Vincenzo ; Gupta, Rajan ; ... November 2015 - Physical Review Letters

Cited by 31Full Text Available
Neutron and proton electric dipole moments from N _f=2+1 domain-wall fermion lattice QCD

Journal Article Shintani, Eigo ; Blum, Thomas ; Izubuchi, Taku ; ... May 2016 - Physical Review D

We present a lattice calculation of the neutron and proton electric dipole moments (EDM’s) with N _f = 2 + 1 flavors of domain-wall fermions. The neutron and proton EDM form factors are extracted from three-point functions at the next-to-leading order in the θ vacuum of QCD. In this computation, we use pion masses 330 and 420 MeV and 2.7 fm ³ lattices with Iwasaki gauge action and a 170 MeV pion and 4.6 fm ³ lattice with I-DSDR gauge action, all generated by the RBC and UKQCD collaborations. The all-mode-averaging technique enables an efficient, high statistics calculation; however themore »« less
Cited by 7Full Text Available
Isovector and isoscalar tensor charges of the nucleon from lattice QCD

Journal Article Bhattacharya, Tanmoy ; Cirigliano, Vincenzo ; Cohen, Saul D. ; ... November 2015 - Physical Review. D, Particles, Fields, Gravitation and Cosmology

Here, we present results for the isovector and flavor diagonal tensor charges g ^u–d _T, g ^u _T, g ^d _T, and g ^s _T needed to probe novel tensor interactions at the TeV scale in neutron and nuclear β-decays and the contribution of the quark electric dipole moment (EDM) to the neutron EDM. The lattice QCD calculations were done using nine ensembles of gauge configurations generated by the MILC collaboration using the HISQ action with 2+1+1 dynamical flavors. These ensembles span three lattice spacings a ≈ 0.06, 0.09 and 0.12 fm and three quark masses corresponding to the pionmore »« less
Cited by 33Full Text Available
Axial, scalar, and tensor charges of the nucleon from $2 + 1 + 1$ -flavor lattice QCD

Journal Article Bhattacharya, Tanmoy ; Cirigliano, Vincenzo ; Cohen, Saul D. ; ... September 2016 - Physical Review D

Here, we present results for the isovector axial, scalar, and tensor charges g ^u–d _A, g ^u–d _S, and g ^u–d _T of the nucleon needed to probe the Standard Model and novel physics. The axial charge is a fundamental parameter describing the weak interactions of nucleons. The scalar and tensor charges probe novel interactions at the TeV scale in neutron and nuclear β-decays, and the flavor-diagonal tensor charges g ^u _T, g ^d _T, and g ^s _T are needed to quantify the contribution of the quark electric dipole moment (EDM) to the neutron EDM. The lattice-QCD calculations weremore »« less
Cited by 24Full Text Available
Neutron electric dipole moment from lattice QCD

Journal Article - in OSTI.gov collection Shintani, E. ; Kanaya, K. ; Aoki, S. ; ... July 2005 - Physical Review. D, Particles Fields

We carry out a feasibility study for the lattice QCD calculation of the neutron electric dipole moment (NEDM) in the presence of the {theta} term. We develop the strategy to obtain the nucleon EDM from the CP-odd electromagnetic form factor F{sub 3} at small {theta}, in which NEDM is given by lim{sub q{sup 2}}{sub {yields}}{sub 0}{theta}F{sub 3}(q{sup 2})/(2m{sub N}), where q is the momentum transfer and m{sub N} is the nucleon mass. We first derive a formula which relates F{sub 3}, a matrix element of the electromagnetic current between nucleon states, with vacuum expectation values of nucleons and/or the current.more »« less
Full Text Available

Access journal articles and accepted manuscripts resulting from DOE research funding

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

Access journal articles and accepted manuscripts
resulting from DOE research funding