scholarly journals Electric dipole moments, new forces and dark matter

2021 ◽  
Vol 2021 (3) ◽  
Author(s):  
Pavel Fileviez Pérez ◽  
Alexis D. Plascencia

Abstract New sources of CP violation beyond the Standard Model are crucial to explain the baryon asymmetry in the Universe. We discuss the impact of new CP violating interactions in theories where a dark matter candidate is predicted by the cancellation of gauge anomalies. In these theories, the constraint on the dark matter relic density implies an upper bound on the new symmetry breaking scale from which all new states acquire their masses. We investigate in detail the predictions for electric dipole moments and show that if the relevant CP-violating phase is large, experiments such as the ACME collaboration will be able to fully probe the theory.

1993 ◽  
Vol 08 (02) ◽  
pp. 209-236 ◽  
Author(s):  
S.M. BARR

The subject of atomic and molecular electric dipole moments is reviewed from the perspective of currently interesting theories of CP violation beyond the standard model.


1995 ◽  
Vol 354 (1-2) ◽  
pp. 99-106 ◽  
Author(s):  
Toby Falk ◽  
Keith A. Olive ◽  
Mark Srednicki

2006 ◽  
Vol 2006 (07) ◽  
pp. 002-002 ◽  
Author(s):  
Vincenzo Cirigliano ◽  
Stefano Profumo ◽  
Michael J Ramsey-Musolf

2018 ◽  
Vol 98 (7) ◽  
Author(s):  
Tomohiro Abe ◽  
Naoya Omoto ◽  
Osamu Seto ◽  
Tetsuo Shindou

2019 ◽  
Vol 223 ◽  
pp. 01007
Author(s):  
Peter Butler ◽  
Liam Gaffney ◽  
Pietro Spagnoletti ◽  
Joonas Konki ◽  
Marcus Scheck ◽  
...  

There is a large body of evidence that atomic nuclei can undergo octupole distortion and assume the shape of a pear. This phenomenon is important for measurements of electric-dipole moments of atoms, which would indicate CP violation and hence probe physics beyond the Standard Model of particle physics. Isotopes of both radon and radium have been identified as candidates for such measurements. Here, we have observed the low-lying quantum states in 224Rn and 226Rn by accelerating beams of these radioactive nuclei. We show that radon isotopes undergo octupole vibrations but do not possess static pear-shapes in their ground states. We conclude that radon atoms provide less favourable conditions for the enhancement of a measurable atomic electric-dipole moment.


2016 ◽  
Vol 31 (14n15) ◽  
pp. 1650082 ◽  
Author(s):  
Takeshi Fukuyama ◽  
Koichiro Asahi

We clarify the conditions or assumptions under which theoretical predictions of various models beyond the standard model give mainly in electric dipole moments. The correct interpretation of those conditions seems to be indispensable to the refinements of model building as well as to the mutual reliance in experimental and theoretical communities. The connections of these analyses to the recent experimental results at the LHC and the other places are also discussed.


2019 ◽  
Vol 10 (1) ◽  
Author(s):  
P. A. Butler ◽  
L. P. Gaffney ◽  
P. Spagnoletti ◽  
J. Konki ◽  
M. Scheck ◽  
...  

Abstract There is a large body of evidence that atomic nuclei can undergo octupole distortion and assume the shape of a pear. This phenomenon is important for measurements of electric-dipole moments of atoms, which would indicate CP violation and hence probe physics beyond the Standard Model of particle physics. Isotopes of both radon and radium have been identified as candidates for such measurements. Here, we observed the low-lying quantum states in 224Rn and 226Rn by accelerating beams of these radioactive nuclei. We show that radon isotopes undergo octupole vibrations but do not possess static pear-shapes in their ground states. We conclude that radon atoms provide less favourable conditions for the enhancement of a measurable atomic electric-dipole moment.


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