Searches for Electric Dipole Moments—Overview of Status and New Experimental Efforts
Searches for permanent electric dipole moments (EDMs) of fundamental particles, atoms and molecules are promising experiments to constrain and potentially reveal beyond Standard Model (SM) physics. A non-zero EDM is a direct manifestation of time-reversal (T) violation, and, equivalently, violation...
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| Format: | Article |
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MDPI AG
2019-02-01
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| Series: | Universe |
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| Online Access: | https://www.mdpi.com/2218-1997/5/2/56 |
| _version_ | 1818015168361136128 |
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| author | Florian Kuchler on behalf of the TUCAN and HeXeEDM Collaborations |
| author_facet | Florian Kuchler on behalf of the TUCAN and HeXeEDM Collaborations |
| author_sort | Florian Kuchler |
| collection | DOAJ |
| description | Searches for permanent electric dipole moments (EDMs) of fundamental particles, atoms and molecules are promising experiments to constrain and potentially reveal beyond Standard Model (SM) physics. A non-zero EDM is a direct manifestation of time-reversal (T) violation, and, equivalently, violation of the combined operation of charge-conjugation (C) and parity inversion (P). Identifying new sources of CP violation can help to solve fundamental puzzles of the SM, e.g., the observed baryon-asymmetry in the Universe. Theoretical predictions for magnitudes of EDMs in the SM are many orders of magnitude below current experimental limits. However, many theories beyond the SM require larger EDMs. Experimental results, especially when combined in a global analysis, impose strong constraints on CP violating model parameters. Including an overview of EDM searches, I will focus on the future neutron EDM experiment at TRIUMF (Vancouver). For this effort, the TUCAN (TRIUMF Ultra Cold Advanced Neutron source) collaboration is aiming to build a strong, world leading source of ultra cold neutrons (UCN) based on a unique combination of a spallation target and a superfluid helium UCN converter. Another focus will be the search for an EDM of the diamagnetic atom <inline-formula> <math display="inline"> <semantics> <msup> <mrow></mrow> <mn>129</mn> </msup> </semantics> </math> </inline-formula>Xe using a <inline-formula> <math display="inline"> <semantics> <msup> <mrow></mrow> <mn>3</mn> </msup> </semantics> </math> </inline-formula>He comagnetometer and SQUID detection. The HeXeEDM collaboration has taken EDM data in 2017 and 2018 in the magnetically shielded room (BMSR-2) at PTB Berlin. |
| first_indexed | 2024-04-14T06:53:31Z |
| format | Article |
| id | doaj.art-997678104cbe4afeaf2792737c3a7851 |
| institution | Directory Open Access Journal |
| issn | 2218-1997 |
| language | English |
| last_indexed | 2024-04-14T06:53:31Z |
| publishDate | 2019-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Universe |
| spelling | doaj.art-997678104cbe4afeaf2792737c3a78512022-12-22T02:06:57ZengMDPI AGUniverse2218-19972019-02-01525610.3390/universe5020056universe5020056Searches for Electric Dipole Moments—Overview of Status and New Experimental EffortsFlorian Kuchler0on behalf of the TUCAN and HeXeEDM CollaborationsPhysical Sciences Division, TRIUMF, Vancouver, BC V6T 2A3, CanadaSearches for permanent electric dipole moments (EDMs) of fundamental particles, atoms and molecules are promising experiments to constrain and potentially reveal beyond Standard Model (SM) physics. A non-zero EDM is a direct manifestation of time-reversal (T) violation, and, equivalently, violation of the combined operation of charge-conjugation (C) and parity inversion (P). Identifying new sources of CP violation can help to solve fundamental puzzles of the SM, e.g., the observed baryon-asymmetry in the Universe. Theoretical predictions for magnitudes of EDMs in the SM are many orders of magnitude below current experimental limits. However, many theories beyond the SM require larger EDMs. Experimental results, especially when combined in a global analysis, impose strong constraints on CP violating model parameters. Including an overview of EDM searches, I will focus on the future neutron EDM experiment at TRIUMF (Vancouver). For this effort, the TUCAN (TRIUMF Ultra Cold Advanced Neutron source) collaboration is aiming to build a strong, world leading source of ultra cold neutrons (UCN) based on a unique combination of a spallation target and a superfluid helium UCN converter. Another focus will be the search for an EDM of the diamagnetic atom <inline-formula> <math display="inline"> <semantics> <msup> <mrow></mrow> <mn>129</mn> </msup> </semantics> </math> </inline-formula>Xe using a <inline-formula> <math display="inline"> <semantics> <msup> <mrow></mrow> <mn>3</mn> </msup> </semantics> </math> </inline-formula>He comagnetometer and SQUID detection. The HeXeEDM collaboration has taken EDM data in 2017 and 2018 in the magnetically shielded room (BMSR-2) at PTB Berlin.https://www.mdpi.com/2218-1997/5/2/56electric dipole momentEDMCP violationnew physicsneutronxenon |
| spellingShingle | Florian Kuchler on behalf of the TUCAN and HeXeEDM Collaborations Searches for Electric Dipole Moments—Overview of Status and New Experimental Efforts Universe electric dipole moment EDM CP violation new physics neutron xenon |
| title | Searches for Electric Dipole Moments—Overview of Status and New Experimental Efforts |
| title_full | Searches for Electric Dipole Moments—Overview of Status and New Experimental Efforts |
| title_fullStr | Searches for Electric Dipole Moments—Overview of Status and New Experimental Efforts |
| title_full_unstemmed | Searches for Electric Dipole Moments—Overview of Status and New Experimental Efforts |
| title_short | Searches for Electric Dipole Moments—Overview of Status and New Experimental Efforts |
| title_sort | searches for electric dipole moments overview of status and new experimental efforts |
| topic | electric dipole moment EDM CP violation new physics neutron xenon |
| url | https://www.mdpi.com/2218-1997/5/2/56 |
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