Por Pedro Ferreira (Instituto Superior de Engenharia de Lisboa, Instituto Politécnico de Lisboa; e Centro de Física Teórica e Computacional, Faculdade de Ciências, Universidade de Lisboa, Portugal).
LHC discovered in 2012 the first and so far only elementary spin-0 scalar particle - the Higgs boson, predicted by the Standard Model of particle physics. Other theories - extensions of the Standard Model which attempt to explain phenomena such as why there is more matter than antimatter in the universe, or the nature or Dark Matter - predict the existence of other scalars. In the Two-Higgs Doublet Model a charged scalar, a pseudoscalar and a CP-even scalar heavier than the Higgs boson are predicted - so why haven't they yet been discovered? In this seminar I will explain why finding new scalars is proving very difficult and review two recent works where faint LHC indicia may point to new particles, to be confirmed - or not... - during the next few years.
