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Electroweak production of light scalar-pseudoscalar pairs from extended Higgs sectors
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics. (Theoretical high energy physics)ORCID iD: 0000-0003-0452-0671
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics. School of Physics and Astronomy, University of Manchester, UK. (Theoretical high energy physics)
School of Physics and Astronomy, University of Southampton, UK.
Korea Institute for Advanced Study, Seoul, Korea.
2017 (English)In: Physics Letters B, ISSN 0370-2693, E-ISSN 1873-2445, Vol. 764, 121-125 p.Article in journal (Refereed) Published
Abstract [en]

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
2017. Vol. 764, 121-125 p.
Keyword [en]
Higgs bosons, beyond the Standard Model, LHC
National Category
Subatomic Physics
Research subject
Physics with specialization in Elementary Particle Physics
Identifiers
URN: urn:nbn:se:uu:diva-292869DOI: 10.1016/j.physletb.2016.11.012ISI: 000390127100015OAI: oai:DiVA.org:uu-292869DiVA: diva2:926869
Funder
Swedish Research Council, 621-2011-5107EU, Horizon 2020, H2020-MSCA-RISE-2014 No. 645722
Available from: 2016-05-10 Created: 2016-05-10 Last updated: 2017-04-10Bibliographically approved

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Publisher's full textarXiv:1605.02498 [hep-ph]

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