Regular Article - Theoretical Physics
LHC constraints on that couple mainly to third generation fermions
Department of Natural and Mathematical Sciences, Ozyegin University, 34794, Istanbul, Turkey
2 Tsung-Dao Lee Institute and Department of Physics and Astronomy, SKLPPC, Shanghai Jiao Tong University, 800 Dongchuan Rd., Minhang, 200240, Shanghai, China
3 Department of Physics, National Taiwan University, No. 1, Sec. 4, Roosevelt Rd., 106, Taipei, Taiwan
4 Physics Division, National Center for Theoretical Sciences, No. 101, Sec. 2, Kuang Fu Rd., 300, Hsinchu, Taiwan
5 School of Physics and Astronomy, Monash University, 3800, Melbourne, VIC, Australia
Accepted: 26 September 2020
Published online: 3 November 2020
We use the results of CMS and ATLAS searches for resonances that decay to or tb and or final states to constrain the parameters of non-universal and gauge bosons that couple preferentially to the third generation. For the former we consider production from annihilation and find very weak constraints on the strength of the interaction and only for the mass range between 800 and 1100 GeV from the channel. The constraints on the latter are much stronger and arise from both and production. Treated separately, we find that the weak constraints on the still permit an explanation of the anomalies with a light sterile neutrino whereas the stronger constraints on the exclude significant light sterile neutrino contributions to the rates. Within specific models the masses of and are of course related and we briefly discuss the consequences.
© The Author(s) 2020
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