# The search for the neutron electric dipole moment at PSI

### Submission summary

 As Contributors: Philipp Schmidt-Wellenburg Arxiv Link: https://arxiv.org/abs/2103.01898v1 (pdf) Date accepted: 2021-03-05 Date submitted: 2021-03-03 08:16 Submitted by: Schmidt-Wellenburg, Philipp Submitted to: SciPost Physics Academic field: Physics Specialties: High-Energy Physics - Experiment Approach: Experimental

### Abstract

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) probes 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 ($|d_n|<1.8\times 10^{-26} \, e {\rm cm}$, C.L.90%). A new experiment designed to improve the sensitivity by an order of magnitude, n2EDM, is currently in construction.

###### Current status:
Publication decision taken: accept

Editorial decision: For Journal SciPost Physics Proceedings: Publish
(status: Editorial decision fixed and (if required) accepted by authors)

### Author comments upon resubmission

We implemented all requested changes.

### Submission & Refereeing History

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Resubmission 2103.01898v1 on 3 March 2021
Submission scipost_202102_00004v1 on 2 February 2021