Search for lepton-flavor violation in different-flavor, high-mass final states in pp collisions at √s=13 TeV with the ATLAS detector

Rimoldi, Marco; Mullier, Geoffrey; Miucci, Antonio; Merlassino, Claudia; Haug, Sigve; Weber, Michael; Meloni, Federico; Beck, Hans Peter; Ereditato, Antonio (2018). Search for lepton-flavor violation in different-flavor, high-mass final states in pp collisions at √s=13 TeV with the ATLAS detector. Physical review. D - particles, fields, gravitation, and cosmology, 98(9) American Physical Society 10.1103/PhysRevD.98.092008

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A search is performed for a heavy particle decaying into different-flavor, dilepton pairs (eμ,eτ or μτ), using 36.1fb⁻¹ of proton-proton collision data at √s= 13 TeV collected in 2015–2016 by the ATLAS detector at the Large Hadron Collider. No excesses over the Standard Model predictions are observed. Bayesian lower limits at the 95% credibility level are placed on the mass of a Z' boson, the mass of a supersymmetric τ-sneutrino, and on the threshold mass for quantum black-hole production. For the Z' and sneutrino models, upper cross-section limits are converted to upper limits on couplings, which are compared with similar limits from low-energy experiments and which are more stringent for the eτ and μτ modes.

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