CERN Accelerating science

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1.
Measurement of the Permanent Electric Dipole Moment of the Neutron / Abel, C. (Sussex U.) ; Afach, S. (PSI, Villigen ; Zurich, ETH) ; Ayres, N.J. (Sussex U. ; Zurich, ETH) ; Baker, C.A. (Rutherford) ; Ban, G. (Caen U.) ; Bison, G. (PSI, Villigen) ; Bodek, K. (Jagiellonian U.) ; Bondar, V. (PSI, Villigen ; Zurich, ETH ; Leuven U.) ; Burghoff, M. (Berlin, Phys. Tech. Bund.) ; Chanel, E. (U. Bern, AEC) et al.
We present the result of an experiment to measure the electric dipole moment (EDM) of the neutron at the Paul Scherrer Institute using Ramsey's method of separated oscillating magnetic fields with ultracold neutrons (UCN). Our measurement stands in the long history of EDM experiments probing physics violating time reversal invariance. [...]
arXiv:2001.11966.- 2020-02-29 - 7 p. - Published in : Phys. Rev. Lett. 124 (2020) 081803 Article from SCOAP3: PDF; Fulltext: PDF;
2.
A Revised Experimental Upper Limit on the Electric Dipole Moment of the Neutron / Pendlebury, J  M (Sussex U.) ; Afach, S (PSI, Villigen ; Zurich, ETH) ; Ayres, N J (Sussex U.) ; Baker, C A (Rutherford) ; Ban, G (Caen U.) ; Bison, G (PSI, Villigen) ; Bodek, K (Jagiellonian U) ; Burghoff, M (Berlin, Phys. Tech. Bund.) ; Geltenbort, P (Laue-Langevin Inst.) ; Green, K (Guelph U. ; Rutherford) et al.
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 (UCN); 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. [...]
arXiv:1509.04411.- 2015 - 23 p. - Published in : Phys. Rev. D 92 (2015) 092003 APS Open Access article: PDF; External link: Preprint
3.
A magnetically shielded room with ultra low residual field and gradient / Altarev, I. (Munich, Tech. U.) ; Babcock, E. (ZAT, Julich) ; Beck, D. (Illinois U., Urbana (main)) ; Burghoff, M. (Berlin, Phys. Tech. Bund.) ; Chesnevskaya, S. (Munich, Tech. U.) ; Chupp, T. (Michigan U.) ; Degenkolb, S. (Michigan U.) ; Fan, I. (Berlin, Phys. Tech. Bund.) ; Fierlinger, P. (EFDA-CSU, Garching ; Munich, Tech. U.) ; Frei, A. (Forschungsreaktor Munich) et al.
A versatile and portable magnetically shielded room with a field of (700 \pm 200) pT within a central volume of 1m x 1m x 1m and a field gradient less than 300 pT/m is described. This performance represents more than a hundred-fold improvement of the state of the art for a two-layer magnetic shield and provides an environment suitable for a next generation of precision experiments in fundamental physics at low energies; in particular, searches for electric dipole moments of fundamental systems and tests of Lorentz-invariance based on spin-precession experiments. [...]
arXiv:1403.6467.- 2014 - 9 p. - Published in : Rev. Sci. Instrum. 85 (2014) 075106 Fulltext: PDF; External link: Preprint

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