Electroweak production of light scalar-pseudoscalar pairs from extended Higgs sectors
2016 (English)Article in journal (Refereed) Submitted
In models with extended Higgs sectors, it is possible that the Higgs boson discovered at the LHC is not the lightest one. We show that in a realistic model (the Type I 2-Higgs Doublet Model), when the sum of the masses of a light scalar and a pseudoscalar (h and A) is smaller than the Z boson mass, the Electroweak (EW) production of an hA pair, which is generally neglected, can dominate over QCD production by orders of magnitude. This is because in the gg-initiated process, hA production via a resonant Z in the s-channel is prohibited according to the Landau-Yang theorem, which is not the case for the qq-initiated process. We explore the parameter space of the model to highlight regions giving such hA solutions while being consistent with all constraints from collider searches, b-physics and EW precision data. We also single out a few benchmark points to discuss their salient features, including the hA search channels that can be exploited at Run II of the LHC.
Place, publisher, year, edition, pages
Higgs bosons, beyond the Standard Model, LHC
Research subject Physics with specialization in Elementary Particle Physics
IdentifiersURN: urn:nbn:se:uu:diva-292869OAI: oai:DiVA.org:uu-292869DiVA: diva2:926869
Funded by Horizon2020 project H2020-MSCA-RISE-2014 No. 645722 (NonMinimalHiggs)2016-05-102016-05-102016-05-10