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Free, publicly-accessible full text available November 1, 2024
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A bstract Three searches are presented for signatures of physics beyond the standard model (SM) in
ττ final states in proton-proton collisions at the LHC, using a data sample collected with the CMS detector at = 13 TeV, corresponding to an integrated luminosity of 138 fb$$ \sqrt{s} $$ − 1. Upper limits at 95% confidence level (CL) are set on the products of the branching fraction for the decay intoτ leptons and the cross sections for the production of a new bosonϕ , in addition to the H(125) boson, via gluon fusion (ggϕ ) or in association with b quarks, ranging from (10 pb) for a mass of 60 GeV to 0.3 fb for a mass of 3.5 TeV each. The data reveal two excesses for gg$$ \mathcal{O} $$ ϕ production with localp -values equivalent to about three standard deviations atm ϕ = 0. 1 and 1.2 TeV. In a search fort -channel exchange of a vector leptoquark U1, 95% CL upper limits are set on the dimensionless U1leptoquark coupling to quarks andτ leptons ranging from 1 for a mass of 1 TeV to 6 for a mass of 5 TeV, depending on the scenario. In the interpretations of the and$$ {M}_{\textrm{h}}^{125} $$ minimal supersymmetric SM benchmark scenarios, additional Higgs bosons with masses below 350 GeV are excluded at 95% CL.$$ {M}_{\textrm{h},\textrm{EFT}}^{125} $$ Free, publicly-accessible full text available July 1, 2024