@misc{10481/91344,
year = {2023},
month = {11},
url = {https://hdl.handle.net/10481/91344},
abstract = {A search for a new pseudoscalar a-boson produced in events with a top-quark pair, where the a-boson decays into a pair of muons, is performed using √s=13  TeV pp collision data collected with the ATLAS detector at the LHC, corresponding to an integrated luminosity of 139  fb−1. The search targets the final state where only one top quark decays to an electron or muon, resulting in a signature with three leptons eμμ and μμμ. No significant excess of events above the Standard Model expectation is observed and upper limits are set on two signal models: pp→tta and pp→tt with t→H±b, H±→W±a, where a→μμ, in the mass ranges 15  GeV<ma<72  GeV and 120  GeV≤mH±≤160  GeV.},
organization = {CERN},
organization = {MICINN},
organization = {COST},
organization = {ERC},
organization = {ERDF},
organization = {Horizon 2020},
organization = {Marie Skłodowska-Curie Actions},
organization = {La Caixa Banking Foundation},
organization = {CERCA Programme Generalitat de Catalunya},
organization = {PROMETEO and GenT Programmes Generalitat Valenciana},
publisher = {American Physical Society},
title = {Search for a new pseudoscalar decaying into a pair of muons in events with a top-quark pair at √s=13 TeV with the ATLAS detector},
doi = {10.1103/PhysRevD.108.092007},
author = {Aad, Georges and Rodríguez Chala, Mikael and Atlas Collaboration, /},
}