Searching for charged lepton flavor violation at ep colliders

Antusch, Stefan and Hammad, A. and Rashed, Ahmed. (2021) Searching for charged lepton flavor violation at ep colliders. Journal of High Energy Physics (3). p. 230.

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We investigate the sensitivity of electron-proton (ep) colliders for charged lepton flavor violation (cLFV) in an effective theory approach, considering a general effective Lagrangian for the conversion of an electron into a muon or a tau via the effective coupling to a neutral gauge boson or a neutral scalar field. For the photon, the Z boson and the Higgs particle of the Standard Model, we present the sensitivities of the LHeC for the coefficients of the effective operators, calculated from an analysis at the reconstructed level. As an example model where such flavor changing neutral current (FCNC) operators are generated at loop level, we consider the extension of the Standard Model by sterile neutrinos. We show that the LHeC could already probe the LFV conversion of an electron into a muon beyond the current experimental bounds, and could reach more than an order of magnitude higher sensitivity than the present limits for LFV conversion of an electron into a tau. We discuss that the high sensitivities are possible because the converted charged lepton is dominantly emitted in the backward direction, enabling an efficient separation of the signal from the background.
Faculties and Departments:05 Faculty of Science > Departement Physik > Physik > Theoretische Physik (Antusch)
UniBasel Contributors:Antusch, Stefan and Hammad, Ahmed
Item Type:Article, refereed
Article Subtype:Research Article
Note:Publication type according to Uni Basel Research Database: Journal article
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Last Modified:12 Apr 2022 08:05
Deposited On:12 Apr 2022 08:05

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