TY - GEN T1 - Search for a new heavy scalar particle decaying into a Higgs boson and a new scalar singlet in final states with one or two light leptons and a pair of $τ$-leptons with the ATLAS detector UR - http://dx.doi.org/10.1007/JHEP10(2023)009 PY - 2023/07/20 AU - Collaboration ATLAS ED - Y2 - 2025/11/20 ER -