Abstract:
Electric dipole moments (EDM) of fundamental particles inherently violate time-reversal~(T) symmetries implying also the violation of the combined charge-conjugation and parity~(CP) symmetry.
At PSI we plan to measure the EDM of the muon using the frozen-spin technique within a compact storage trap. This method exploits the high effective electric field, $E\approx\SI{165}{MV/m}$, experienced in the rest frame of the muon with a momentum of about $\SI{23}{MeV/}c$ when it passes through a solenoidal magnetic field of $|\vec{B}|=\SI{2.5}{T}$.
In my talk, I will outline fundamental considerations for a muon EDM search and present the current status for a demonstration experiment to be conducted at secondary muon beamlines of the Paul Scherrer Institute in Switzerland. In an initial phase the expected sensitivity to a muon EDM is $\sigma(d)\leq\SI{4E-21}{\ecm}$, assuming 200 days of data.
In a subsequent phase, Phase~II, we propose to improve the sensitivity to $\sigma(d)\leq\SI{6E-23}{\ecm}$ using a dedicated instrument installed on a different beamline that produces muons of momentum \SI{125}{\MeVc}.
Biography:
2021 – today Staff Scientist, LTP, Muon Group, PSI
- Spokesperson of the muEDM collaboration.
Main collaborators: M. Giovannozzi (CERN), A. Papa (INFN PISA),
F. Renga (INFN Roma), J. Vossebeld (U. Liverpool) - Leader of small ERC consolidator research group within the muon group.
- Day-to-day supervision of doctoral students and post-doc.
- Lecturer “Nuclear and Particle Physics” Introductory course at University of Basel.
- Chairing and participating in several internal and external committees and commissions.
PREVIOUS POSITION
2015- 2021 Staff Scientist, LTP, UCN Group, PSI
- Leader of muon EDM initiative (since 2019).
Other initiators: A. Adelmann (PSI, CSD), T. Bowcock (U. Liverpool),
N. Berger (U. Mainz), A. Papa (INFN PISA). - Co-Spokesperson of the neutron EDM at PSI (since 2018 - 2021).
Main collaborators: K. Bodek (U. Cracow), K. Kirch (PSI),
G. Pignol (LPSC Grenoble), N. Severijns (U. Leuven), G. Ban (LPC Caen)
2009 – 2015 Staff scientist on tenure track, Paul Scherrer Institute, Switzerland
Technical coordinator of the neutron EDM at PSI (since 2011).
High voltage task manager (2009-2010).
2006 – 2009 Doctoral student, Institut Laue-Langevin, France (supervision O. Zimmer)
Development of a prototype of an ultra cold neutron source (SUN-I).
Development of intercalated graphite crystals for cold neutron beam optics.
Development of pixelated an ultra cold neutron detector with a few micrometer resolution.
Alternative online link：https://meeting.tencent.com/dm/vRjMPJzWFkCZ
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