How the Minuscule Can Contribute to the Big Picture: The Neutron Electric Dipole Moment Project at TRIUMF

Picker, R.

doi:10.7566/jpscp.13.010005

Cited by 15 publications

(9 citation statements)

References 42 publications

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“…There are several plans of the future experiments for the electron and neutron EDM. For example, the sensitivity for the electron and neutron EDM might reach around 10 −30 e cm [98] and 10 −27 e cm [99], respectively. The improvement for the electron EDM makes the widths of the allowed region in figures 2 and 3 about 1/10.…”

Section: )mentioning

confidence: 99%

Aligned CP-violating Higgs sector canceling the electric dipole moment

Kanemura

Kubota

Yagyu

2020

J. High Energ. Phys.

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We discuss the effect of CP violation in the aligned scenario of the general two-Higgs-doublet model, in which the Higgs potential and the Yukawa interaction provide additional CP-violating phases. An alignment is imposed to the Yukawa interaction in order to avoid dangerous flavor changing neutral currents. The Higgs potential is also aligned such that the coupling constants of the lightest Higgs boson, which is identified as the discovered Higgs boson with the mass of 125 GeV, are the same as those of the standard model. In general, CP-violating phases originated by the Yukawa interaction and the Higgs potential are strongly constrained by the current data for the electric dipole moment (EDM). It is found that in our scenario contributions from the two sources of CP violation can be destructive and consequently their total contribution can satisfy the EDM results, even when each CP-violating phase is large. Such a large CP-violating phase can be tested at collider experiments by looking at the angular distributions of particles generated by the decays of the additional Higgs bosons.

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Section: )mentioning

confidence: 99%

Aligned CP-violating Higgs sector canceling the electric dipole moment

Kanemura

Kubota

Yagyu

2020

J. High Energ. Phys.

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“…3 The Barr-Zee effects and the Weinberg operator, in turn, give rise to sizable corrections to the electron [30][31][32], neutron [33,34] and diamagnetic atoms [35] electric dipole moments (EDM's). All these effects are tightly constrained by the present data, moreover the experimental sensitivity is expected to increase by more than one order of magnitude in the near future [32,36,37]. As we will see, the present bounds allow to probe top partners masses of order few TeV and can be competitive with the direct LHC searches.…”

Section: Jhep06(2018)056mentioning

confidence: 59%

“…The present searches for electron [30,31], neutron [33,34] Near-future experiments are expected to significantly improve the bounds on the neutron and electron EDM's. The neutron EDM bounds could be improved up to |d n | < 10 −27 e cm [36]. On the other hand, the ACME collaboration estimates the future sensitivity on the electron EDM to be [37] |d e | 0.5 · 10 −29 e cm (ACME II) (2.41) and |d e | 0.3 · 10 −30 e cm (ACME III) (2.42) that correspond to an improvement of the current constraints by more than two orders of magnitude.…”

Section: Experimental Boundsmentioning

confidence: 99%

Probing light top partners with CP violation

Panico

Riembau

Vantalon

2018

J. High Energ. Phys.

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Abstract:We investigate CP-violating effects induced by light top partners in composite Higgs theories. We find that sizable contributions to the dipole moments of the light SM quarks and leptons are generically generated at the two-loop level through Barr-Zee-type diagrams. The present constraints on the electron and neutron electric dipole moments translate into bounds on top partner masses of order few TeV and are competitive with the reach of LHC direct searches. Interestingly, we find that CP-violation effects are sensitive to the same operators that control top partner single production. Near-future improvements in the determination of the electron dipole moment will extend the reach on top partner masses beyond the 5-10 TeV range.

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“…With the publication of the latest, most stringent limit of d n < 1.8 × 10 −26 e•cm, PSI became the fourth member of the exclusive club of institutes that have hosted a successful nEDM search. It is now competing with a group of fierce and passionate competitors from all around the world [35][36][37][38][39] to break into the range of 1 × 10 −27 e•cm within the next decade. A discovery of an nEDM or a further improved limit would markedly and indelibly shape future models of particle physics beyond the current Standard Model.…”

Section: Outlook and World-wide Competitionmentioning

confidence: 99%

The search for the neutron electric dipole moment at PSI

Pignol

Schmidt-Wellenburg

2021

SciPost Phys. Proc.

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The existence of a nonzero permanent electric dipole moment (EDM) of the neutron would reveal a new source of CP violation and shed light on the origin of the matter–antimatter asymmetry of the Universe. The sensitivity of current experiments using stored ultracold neutrons (UCN) probe new physics beyond the TeV scale. Using the UCN source at the Paul Scherrer Institut, the nEDM collaboration has performed the most sensitive measurement of the neutron EDM to date, still compatible with zero (|d_n|<1.8\times 10^{-26} \, e {cm}|dn|<1.8×10−26ecm, C.L.,90%). A new experiment designed to improve the sensitivity by an order of magnitude, n2EDM, is currently under construction.

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How the Minuscule Can Contribute to the Big Picture: The Neutron Electric Dipole Moment Project at TRIUMF

Cited by 15 publications

References 42 publications

Aligned CP-violating Higgs sector canceling the electric dipole moment

Aligned CP-violating Higgs sector canceling the electric dipole moment

Probing light top partners with CP violation

The search for the neutron electric dipole moment at PSI

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