Centro de Excelencia Severo Ochoa
Menu
Search
Blue room
Extensions of the Standard Model often come with additional, possibly
electroweakly charged Higgs states, the prototypal example being the
Two-Higgs-Doublet Model. While collider phenomenology does not exclude
the possibility for some of these new scalar fields to be light, it is
relatively natural to consider masses in the multi-TeV range, in which
case the only remaining light Higgs boson automatically receives
SM-like properties. The appearance of a hierarchy between the
new-physics states and the electroweak scale then leads to sizable
electroweak corrections, e.g. in the decays of the heavy Higgs bosons,
which are dominated by effects of infrared type, namely Sudakov
logarithms. Such radiative contributions obviously affect the two-body
decays, but should also be paired with the radiation of electroweak
gauge bosons (or lighter Higgs bosons) for a consistent picture at the
one-loop order. Resummation of the leading terms is also relatively
easy to achieve. We re-visit these questions in the specific case of
the fermionic decays of heavy Higgs particles in the Next-to-Minimal
Supersymmetric Standard Model, in particular pointing out the
consequences of the three-body final states for the branching ratios
of the heavy scalars.
Social media