Anomalous spin precession systematic effects in the search for a muon EDM using the frozen-spin technique
Abstract At the Paul Scherrer Institut (PSI), we are developing a high-precision apparatus with the aim of searching for the muon electric dipole moment (EDM) with unprecedented sensitivity. The underpinning principle of this experiment is the frozen-spin technique, a method that suppresses the spin...
| Main Authors: | , , , , , , , , , , , , |
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| Format: | Article |
| Language: | English |
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SpringerOpen
2024-03-01
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| Series: | European Physical Journal C: Particles and Fields |
| Online Access: | https://doi.org/10.1140/epjc/s10052-024-12604-0 |
| _version_ | 1797259079177994240 |
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| author | G. Cavoto R. Chakraborty A. Doinaki C. Dutsov M. Giovannozzi T. Hume K. Kirch K. Michielsen L. Morvaj A. Papa F. Renga M. Sakurai P. Schmidt-Wellenburg |
| author_facet | G. Cavoto R. Chakraborty A. Doinaki C. Dutsov M. Giovannozzi T. Hume K. Kirch K. Michielsen L. Morvaj A. Papa F. Renga M. Sakurai P. Schmidt-Wellenburg |
| author_sort | G. Cavoto |
| collection | DOAJ |
| description | Abstract At the Paul Scherrer Institut (PSI), we are developing a high-precision apparatus with the aim of searching for the muon electric dipole moment (EDM) with unprecedented sensitivity. The underpinning principle of this experiment is the frozen-spin technique, a method that suppresses the spin precession due to the anomalous magnetic moment, thereby enhancing the signal-to-noise ratio for EDM signals. This increased sensitivity enables measurements that would be difficult to achieve with conventional $$g - 2$$ g - 2 muon storage rings. Given the availability of the $${125}\,{\textrm{MeV}/\textit{c}}$$ 125 MeV / c muon beam at PSI, the anticipated statistical sensitivity for the EDM after a year of data collection is $${6\times 10^{-23}}\,{e\!\cdot \!\textrm{cm}}.$$ 6 × 10 - 23 e · cm . To achieve this goal, it is imperative to do a detailed analysis of any potential spurious effects that could mimic EDM signals. In this study, we present a quantitative methodology to evaluate the systematic effects that might arise in the context of the frozen-spin technique utilised within a compact storage ring. Our approach involves the analytical derivation of equations governing the motion of the muon spin in the electromagnetic (EM) fields intrinsic to the experimental setup, validated through numerical simulations. We also illustrate a method to calculate the cumulative geometric (Berry’s) phase. This work complements ongoing experimental efforts to detect a muon EDM at PSI and contributes to a broader understanding of spin-precession systematic effects. |
| first_indexed | 2024-04-24T23:03:43Z |
| format | Article |
| id | doaj.art-7c65190bb0874c5b88b986584e85cc06 |
| institution | Directory Open Access Journal |
| issn | 1434-6052 |
| language | English |
| last_indexed | 2024-04-24T23:03:43Z |
| publishDate | 2024-03-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | European Physical Journal C: Particles and Fields |
| spelling | doaj.art-7c65190bb0874c5b88b986584e85cc062024-03-17T12:36:09ZengSpringerOpenEuropean Physical Journal C: Particles and Fields1434-60522024-03-0184312410.1140/epjc/s10052-024-12604-0Anomalous spin precession systematic effects in the search for a muon EDM using the frozen-spin techniqueG. Cavoto0R. Chakraborty1A. Doinaki2C. Dutsov3M. Giovannozzi4T. Hume5K. Kirch6K. Michielsen7L. Morvaj8A. Papa9F. Renga10M. Sakurai11P. Schmidt-Wellenburg12Istituto Nazionale di Fisica Nucleare, Sez. di RomaPaul Scherrer InstitutPaul Scherrer InstitutPaul Scherrer InstitutCERN Beams DepartmentPaul Scherrer InstitutPaul Scherrer InstitutPaul Scherrer InstitutPaul Scherrer InstitutIstituto Nazionale di Fisica Nucleare, Sez. di PisaIstituto Nazionale di Fisica Nucleare, Sez. di RomaETH ZürichPaul Scherrer InstitutAbstract At the Paul Scherrer Institut (PSI), we are developing a high-precision apparatus with the aim of searching for the muon electric dipole moment (EDM) with unprecedented sensitivity. The underpinning principle of this experiment is the frozen-spin technique, a method that suppresses the spin precession due to the anomalous magnetic moment, thereby enhancing the signal-to-noise ratio for EDM signals. This increased sensitivity enables measurements that would be difficult to achieve with conventional $$g - 2$$ g - 2 muon storage rings. Given the availability of the $${125}\,{\textrm{MeV}/\textit{c}}$$ 125 MeV / c muon beam at PSI, the anticipated statistical sensitivity for the EDM after a year of data collection is $${6\times 10^{-23}}\,{e\!\cdot \!\textrm{cm}}.$$ 6 × 10 - 23 e · cm . To achieve this goal, it is imperative to do a detailed analysis of any potential spurious effects that could mimic EDM signals. In this study, we present a quantitative methodology to evaluate the systematic effects that might arise in the context of the frozen-spin technique utilised within a compact storage ring. Our approach involves the analytical derivation of equations governing the motion of the muon spin in the electromagnetic (EM) fields intrinsic to the experimental setup, validated through numerical simulations. We also illustrate a method to calculate the cumulative geometric (Berry’s) phase. This work complements ongoing experimental efforts to detect a muon EDM at PSI and contributes to a broader understanding of spin-precession systematic effects.https://doi.org/10.1140/epjc/s10052-024-12604-0 |
| spellingShingle | G. Cavoto R. Chakraborty A. Doinaki C. Dutsov M. Giovannozzi T. Hume K. Kirch K. Michielsen L. Morvaj A. Papa F. Renga M. Sakurai P. Schmidt-Wellenburg Anomalous spin precession systematic effects in the search for a muon EDM using the frozen-spin technique European Physical Journal C: Particles and Fields |
| title | Anomalous spin precession systematic effects in the search for a muon EDM using the frozen-spin technique |
| title_full | Anomalous spin precession systematic effects in the search for a muon EDM using the frozen-spin technique |
| title_fullStr | Anomalous spin precession systematic effects in the search for a muon EDM using the frozen-spin technique |
| title_full_unstemmed | Anomalous spin precession systematic effects in the search for a muon EDM using the frozen-spin technique |
| title_short | Anomalous spin precession systematic effects in the search for a muon EDM using the frozen-spin technique |
| title_sort | anomalous spin precession systematic effects in the search for a muon edm using the frozen spin technique |
| url | https://doi.org/10.1140/epjc/s10052-024-12604-0 |
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