Non-universal probes of composite Higgs models: New bounds and prospects for FCC-ee

BA Stefanek - arXiv preprint arXiv:2407.09593, 2024 - arxiv.org
We study the leading loop-level phenomenology of composite Higgs models via the effective
field theory of a strongly interacting light Higgs and top quark (SILH+ TQ). We systematically …

BBN catalysis by doubly charged particles

E Akhmedov, M Pospelov - arXiv preprint arXiv:2405.06019, 2024 - arxiv.org
We consider primordial nucleosynthesis in the presence of hypothetical quasi-stable doubly
charged particles. Existence of $ X^{--} $ with macroscopic lifetimes will lead to the formation …