Coleppa, BaradhwajBaradhwajColeppaKhanna, AkshatAkshatKhanna2026-03-062026-03-062026-02-0110.48550/arXiv.2602.17460https://repository.iitgn.ac.in/handle/IITG2025/34779Extending the scalar sector of the Standard Model is a well-motivated approach to exploring physics beyond the Standard Model. In this work, we investigate the phenomenology of the Three Higgs Doublet Model at a future muon collider. The scalar spectrum of the 3HDM comprises three P-even Higgs bosons, two CP-odd Higgs bosons, and a pair of charged Higgs states. Focusing on Higgs pair production via muon-antimuon annihilation, we study the production and decay of neutral scalar states through the process �+� ? ? ?i?j , assuming a mass hierarchy in which the SM�like CP-even Higgs is the lightest state. We analyze several benchmark scenarios leading to b�bb�b and b�btt�final states, and perform a cut-and-count analysis at a center-of-mass energy of ? s = 3 TeV. Our results demonstrate that a future muon collider provides a sensitive and promising environment to probe extended Higgs sectors, with neutral scalar states in the mass range of 200?400 GeV being discoverable with 5? significance for integrated luminosities of O(1�4 ab?1).en-USe-Print