scholarly journals Indirect searches for dark matter with the nEDM spectrometer

2021 ◽  
Author(s):  
Stephanie Roccia ◽  
Geza Zsigmond
Keyword(s):  
Magnetic Field ◽  
Dark Matter ◽  
Dipole Moment ◽  
Electric Dipole Moment ◽  
Electric Dipole ◽  
Short Range ◽  
High Sensitivity ◽  
Precession Frequency ◽  
Low Magnetic Field ◽  
Dependent Interaction

The nEDM apparatus at PSI has been used to search for different dark matter signatures utilizing its high sensitivity to shifts in the neutron precession frequency and its well-controlled low magnetic field at the \muμT level. Such a shift could be interpreted as a consequence of a short-range spin-dependent interaction that could possibly be mediated by axions or axion-like particles, or as an axion-induced oscillating electric dipole moment of the neutron. Another search, based on so-called UCN disappearance measurements, targeted previously reported signals of neutron to mirror-neutron oscillations. These dark matter searches confirmed and improved previous results, as detailed in this review.

BERRY'S PHASE AND ORGANIC SALT WITH CHARGE TRANSFER

2002 ◽  
Vol 16 (03) ◽  
pp. 57-67
Author(s):  
A. C. AGUIAR PINTO ◽  
M. T. THOMAZ ◽  
R. BRUNO
Keyword(s):  
Magnetic Field ◽  
Dipole Moment ◽  
Charge Transfer ◽  
Electric Dipole Moment ◽  
Electric Dipole ◽  
Adiabatic Limit ◽  
Organic Salt ◽  
Berry's Phase ◽  
Berry’S Phase

We consider the dynamics of a dimer of the organic salt N-methyl-M-ethylmorpholinium-tetracyanoquinodimethane [MEM(TCNQ)2] in the presence of an external precessing magnetic field. We derive the influence of Berry's phases on the magnetization and electric dipole moment per site of the organic salt in the adiabatic limit.

scholarly journals Quark electric dipole moment induced by magnetic field

2010 ◽  
Vol 81 (3) ◽  
Author(s):  
P. V. Buividovich ◽  
M. N. Chernodub ◽  
E. V. Luschevskaya ◽  
M. I. Polikarpov
Keyword(s):  
Magnetic Field ◽  
Dipole Moment ◽  
Electric Dipole Moment ◽  
Electric Dipole

scholarly journals nEDM experiment at PSI: Data-taking strategy and sensitivity of the dataset

2019 ◽  
Vol 219 ◽  
pp. 02001 ◽  
Author(s):  
C. Abel ◽  
N.J. Ayres ◽  
G. Ban ◽  
G. Bison ◽  
K. Bodek ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Dipole Moment ◽  
Electric Dipole Moment ◽  
Electric Dipole ◽  
Neutron Electric Dipole Moment ◽  
Systematic Effects ◽  
Paul Scherrer ◽  
Coherent Picture ◽  
The Magnetic Field ◽  
Better Than

We report on the strategy used to optimize the sensitivity of our search for a neutron electric dipole moment at the Paul Scherrer Institute. Measurements were made upon ultracold neutrons stored within a single chamber at the heart of our apparatus. A mercury cohabiting magnetometer together with an array of cesium magnetometers were used to monitor the magnetic field, which was controlled and shaped by a series of precision field coils. In addition to details of the setup itself, we describe the chosen path to realize an appropriate balance between achieving the highest statistical sensitivity alongside the necessary control on systematic effects. The resulting irreducible sensitivity is better than 1 × 10−26e cm. This contribution summarizes in a single coherent picture the results of the most recent publications of the collaboration.

scholarly journals A new limit of the 129Xenon Electric Dipole Moment

2019 ◽  
Vol 219 ◽  
pp. 02003
Author(s):  
Fabian Allmendinger ◽  
Ilhan Engin ◽  
Olivier Grasdijk ◽  
Werner Heil ◽  
Klaus Jungmann ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Dipole Moment ◽  
Electric Dipole Moment ◽  
Electric Dipole ◽  
Free Induction Decay ◽  
Low Noise ◽  
Upper Limit ◽  
Free Induction ◽  
Field Fluctuations ◽  
Spin Species

We report on the first preliminary result of our 129Xe EDM measurement performed by the MIXed collaboration. The aim of this report is to demonstrate the feasibility of a new method to set limits on nuclear EDMs by investigating the EDM of the diamagnetic 129Xe atoms. In our setup, hyperpolarized 3He serves as a comagnetometer needed to suppress magnetic field fluctuations. The free induction decay of the two polarized spin species is directly measured by low noise DC SQUIDs, and the weighted phase difference extracted from these measurements is used to determine a preliminary upper limit on the 129Xe EDM.

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