Revised experimental upper limit on the electric dipole moment of the neutron

By J. Pendlebury, S. Afach, N. Ayres, C. A. Baker, G. Ban, G. Bison, K. Bodek, M. Burghoff, P. Geltenbort, K. Green and 40 more. 2015

469 citations recorded by the source corpus.

We present for the first time a detailed and comprehensive analysis of the experimental results that set the current world sensitivity limit on the magnitude of the electric dipole moment (EDM) of the neutron. We have extended and enhanced our earlier analysis to include recent developments in the understanding of the effects of gravity in depolarizing ultracold neutrons; an improved calculation of the spectrum of the neutrons; and conservative estimates of other possible systematic errors, which are also shown to be consistent with more recent measurements undertaken with the apparatus. We obtain a net result of dn=−0.21±1.82×10−26 e cm, which may be interpreted as a slightly revised upper limit on the magnitude of the EDM of 3.0×10−26 e cm (90% C.L.) or 3.6×10−26 e cm (95% C.L.).

Subfields: Atomic and Molecular Physics, and Optics

View Paper: https://www.semanticscholar.org/paper/fd4dde9be612edc00e8a3c18cb2a6489afa14e00

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In Atomic and Molecular Physics, and Optics

Citations in the corpus

Electroweak radiative corrections for collider physics (2019, background): “Experimentally the upper bound on |θQCD| is of the order 10−10 [97], which is deduced from experimentally constraining the neutron electric dipole moment [98, 99].”
Electric dipole moments of atoms, molecules, nuclei, and particles (2017, methodology): “…(Regan et al., 2002b); d (Hudson et al., 2011); e (Baron et al., 2014); f (Cairncross et al., 2017); g (Graner et al., 2017); h (Rosenberry, 2001); i (Parker et al., 2015); j (Cho et al., 1991); k (Pendlebury et al., 2015); l (Bennett et al., 2009); m (Inami et al., 2003); n (Pondrom et al., 1981).”
The landscape of QCD axion models (2020, unknown): “nEDM(nEDM)standsoutasthemost sensitiveone. Thelatterisdeﬁnedintermsofthenon-relativisticHamiltonian H= d nE~S;^ (27) andthecurrentexperimentallimitisjdexp n j<3:0 1210 26 ecm= 1:510 eGeV 1 (90% CL)[59].8 Anew roundofsearchesareactivelyunderwaywiththegoalofimprovingthesensitivitytoCPviolationbyupt”
Nonstandard heavy mesons and baryons: Experimental evidence (2017, background): “Limits on the electric dipole moment of the neutron confirm that QCD is matter-antimatter symmetric to a high degree of confidence (122).”
Electroweak phase transition and baryogenesis in composite Higgs models (2018, unknown): “0×10−26 cm @ 90% CL [65] (see also [66,67]).”
An Introduction to Particle Dark Matter (2019, background): “[66] Pendlebury, J.”
Search for New Physics with Atoms and Molecules (2017, background): “Searches for nuclear SMts (and the bare neutron’s EDM (Baker et al., 2006; Pendlebury et al., 2015)) set a strong bound θ̄QCD ∼ 10−10, while naively one expects dimensionless fundamental parameters to have values of or-”
Search for Axionlike Dark Matter through Nuclear Spin Precession in Electric and Magnetic Fields (2017, methodology): “The data were subsequently reanalyzed to give a revised limit in 2015 [65].”
Physics beyond colliders at CERN: beyond the Standard Model working group report (2019, background): “A long chain of experiments with ever increasing sensitivity, first with neutron beams and later with stored ultracold neutrons (UCN), has yielded the present best limit of ∣ ∣ < ́ d 3 10 ecm n 26 [144].”
TASI Lectures on the Strong CP Problem and Axions (2018, background): “The current best measurement of the neutron eDM is [1, 2, 3]”