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Implementation of the frozen-spin technique for the search for a muon electric dipole moment
/ Hume, Timothy (PSI, Villigen ; Zurich, ETH) ; Chakraborty, Ritwika (PSI, Villigen) ; Doinaki, Anastasia (PSI, Villigen ; Zurich, ETH) ; Dutsov, Chavdar (PSI, Villigen) ; Giovannozzi, Massimo (CERN) ; Michielsen, Katia (PSI, Villigen ; Zurich, ETH) ; Morvaj, Ljiljana (PSI, Villigen) ; Papa, Angela (PSI, Villigen ; INFN, Pisa) ; Schmidt-Wellenburg, Philipp (PSI, Villigen) ; Stäger, David (PSI, Villigen ; Zurich, ETH)
/muEDM Collaboration
Applying the frozen-spin technique in a compact3 T solenoid will enable a search for the muon electricdipole moment (EDM) with unprecedented sensitivity, improving uponthe current direct limit by approximately a factor of 1000. Afterinjection of a selected muon, a pulsed magnetic field will reduceits longitudinal momentum sufficiently to be confined within astatic weakly-focusing magnetic field and maintain a closed circularorbit. [...]
2024 - 5 p.
- Published in : JINST 19 (2024) P01021
Fulltext: PDF;
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Preparations for a search of the muon EDM at PSI
/ Schmidt-Wellenburg, P (PSI, Villigen) ; Calzolaio, C (PSI, Villigen) ; Doinaki, A (PSI, Villigen) ; Dutsov, C (PSI, Villigen) ; Giovannozzi, M (CERN) ; Hume, T (PSI, Villigen) ; Trillaud, F (Mexico U.)
/muEDM Collaboration
Electric dipole moments (EDMs) of fundamental particles violate time invariance and the combined symmetry of charge and parity (CP). The existence of a large muon EDM (muEDM) is made plausible by tensions with Standard Model predictions for semileptonic decays of heavy meson measured at LHCb, BaBar, and Belle, as well as the muon’s anomalous magnetic moment (AMM). [...]
2023 - 5 p.
- Published in : EPJ Web Conf. 289 (2023) 01008
Fulltext: PDF;
In : Workshop on "Flavour changing and conserving processes" 2022 (FCCP 2022), Anacapri, Italy, 22 - 24 Sep 2022, pp.01008
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Anomalous spin precession systematic effects in the search for a muon EDM using the frozen-spin technique
/ Cavoto, G. (INFN, Rome) ; Chakraborty, R. (PSI, Villigen) ; Doinaki, A. (PSI, Villigen) ; Dutsov, C. (PSI, Villigen) ; Giovannozzi, M. (CERN) ; Hume, T. (PSI, Villigen ; Zurich, ETH) ; Kirch, K. (PSI, Villigen ; Zurich, ETH) ; Michielsen, K. (PSI, Villigen ; Zurich, ETH ; Ec. Polytech., Palaiseau (main)) ; Morvaj, L. (PSI, Villigen) ; Papa, A. (INFN, Pisa) et al.
At the Paul Scherrer Institut (PSI), we are currently working on the development of 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. [...]
arXiv:2311.10508.-
2024-03-12 - 24 p.
- Published in : Eur. Phys. J. C 84 (2024) 262
Fulltext: 2311.10508 - PDF; document - PDF;
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Status of the muEDM Experiment at PSI
/ Khaw, Kim Siang (Shanghai Jiao Tong U.) ; Chen, Cheng (Shanghai Jiao Tong U.) ; Giovannozzi, Massimo (CERN) ; Hu, Tianqi (Shanghai Jiao Tong U.) ; Lv, Meng (Shanghai Jiao Tong U.) ; Ng, Jun Kai (Shanghai Jiao Tong U.) ; Papa, Angela (Shanghai Jiao Tong U.) ; Schmidt-Wellenburg, Philipp (PSI, Villigen ; INFN, Pisa ; Pisa U.) ; Vitali, Bastiano (PSI, Villigen ; INFN, Pisa ; Rome U.) ; Wong, Guan Ming (Shanghai Jiao Tong U.)
/PSI muEDM Collaboration
Permanent electric dipole moments (EDMs) are excellent probes of physics beyond the Standard Model, especially on new sources of CP violation. The muon EDM has recently attracted significant attention due to discrepancies in the magnetic anomaly of the muon, as well as potential violations of lepton-flavor universality in B-meson decays. [...]
arXiv:2307.01535.-
2023-09-04 - 7 p.
- Published in : Phys. Sci. Forum: 8 (2023) , no. 1, pp. 50
Fulltext: document - PDF; 2307.01535 - PDF;
In : 23rd International Workshop on Neutrinos from Accelerators (NuFact 2022), Snowbird, Salt Lake City, Utah, United States, 30 Jul - 6 Aug 2022, pp.50
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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;
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Optically pumped Cs magnetometers enabling a high-sensitivity search for the neutron electric dipole moment
/ Abel, C. (Sussex U.) ; Afach, S. (PSI, Villigen ; Zurich, ETH) ; Ayres, N.J. (Sussex U. ; Zurich, ETH) ; Ban, G. (Caen U.) ; Bison, G. (PSI, Villigen) ; Bodek, K. (Jagiellonian U.) ; Bondar, V. (PSI, Villigen ; Zurich, ETH ; Leuven U.) ; Chanel, E. (U. Bern, AEC) ; Chiu, P.-J (PSI, Villigen ; Zurich, ETH) ; Crawford, C.B. (Kentucky U.) et al.
An array of sixteen laser-pumped scalar Cs magnetometers was part of the neutron electric dipole moment (nEDM) experiment taking data at the Paul Scherrer Institute in 2015 and 2016. It was deployed to measure the gradients of the experiment's magnetic field and to monitor their temporal evolution. [...]
arXiv:1912.04631.-
2020-05-12 - 17 p.
- Published in : Phys. Rev. A 101 (2020) 053419
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Science Case for the new High-Intensity Muon Beams HIMB at PSI
/ Aiba, M. (PSI, Villigen) ; Amato, A. (PSI, Villigen) ; Antognini, A. (PSI, Villigen ; Zurich, ETH) ; Ban, S. (Tokyo U., ICEPP) ; Berger, N. (U. Mainz, PRISMA) ; Caminada, L. (PSI, Villigen ; Zurich U.) ; Chislett, R. (University Coll. London) ; Crivelli, P. (Zurich, ETH) ; Crivellin, A. (PSI, Villigen ; Zurich U.) ; Maso, G. Dal (PSI, Villigen ; Zurich, ETH) et al.
In April 2021, scientists active in muon physics met to discuss and work out the physics case for the new High-Intensity Muon Beams (HIMB) project at PSI that could deliver of order $10^{10}$ s$^{-1}$ surface muons to experiments. [...]
arXiv:2111.05788.
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