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20th LOMONOSOV CONFERENCE ON ELEMENTARY PARTICLE PHYSICS
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BSM PHYSICS
Lepton Flavour Change: t ^ I vs ^ ^ e
Sacha Davidson (Based on work in progress with M. Ardu and M. Gorbahn) E-mail: s. davidson@lupm. in2p3.fr
LUPM, CNRS, Université de Montpellier, Place Eugene Bataillon, F-34095 Montpellier, Cedex 5, France Received February 22, 2022
Upcoming p ^ e experiments promise exceptional sensitivity to a few key processes, reaching Branching Ratios < 10-16 for p ^ e conversion on Aluminium. Upcoming t ^ l searches will probe many processes down to BR ~ 10-9. In an EFT context, we show that some combinations of p ^ t and t ^ e interactions could induce detectable p ^ e while remaining out of reach to t ^ l searches.
Keywords: BSM physics, lepton flavor violation, branching ratios.
English version: Moscow University Physics Bulletin. 2022. 77, No. 2. Pp. 97-101.
Muon g-2 and Other Observables in Models with Extended Higgs and Matter Sectors
Radovan Dermisek E-mail: dermisek@indiana.edu Physics Department, Indiana University, Bloomington, IN, 47405, USA Received January 15, 2022
I review possible explanations of the muon g-2 anomaly in models with extended Higgs and matter sectors, focusing on extensions of the standard model and the two Higgs doublet model with vectorlike leptons. Predictions of these models, namely the modifications of muon Yukawa and gauge couplings, that can be searched for at the LHC and future colliders, are summarized. I also discuss striking predictions for di-Higgs and tri-Higgs signals at a muon collider that can be tested even at very low energies. Furthermore, I briefly comment on other interesting features and signatures of models with extended Higgs sector and vectorlike matter.
Keywords: BSM physics, muon g-2, extended Higgs sector.
English version: Moscow University Physics Bulletin. 2022. 77, No. 2. Pp. 102-107.
The Mu2e Experiment
Stefano Di Falco (Mu2e Collaboration) E-mail: stefano.difalco@pi.infn.it
INFN Pisa, Largo Bruno Pontecorvo 3, Pisa, Italy Received April 5, 2022
The Mu2e experiment, currently under construction at Fermilab, will search for the neutrinoless conversion of a muon into an electron in the field of an aluminum atom. A clear signature of this charged lepton flavor violating two-body process is given by the monoenergetic conversion electron of 104.97 MeV produced in the final state. The experiment will need 3-5 years of data-taking to achieve a factor of 104 improvement on the current best limit on the conversion rate. After a short description of the experimental apparatus, the experiment's sensitivity and discovery potential will be presented.
Keywords: charged lepton flavor violation experiment.
English version: Moscow University Physics Bulletin. 2022. 77, No. 2. Pp. 108-111.
