Double peak searches for scalar and pseudoscalar resonances at the LHC

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Abstract

Many new physics models contain a neutral scalar resonance that can be predominantly produced via gluon fusion through loops. In such a case, there could be important effects of additional particles, that in turn may hadronize before decaying and form bound states. This interesting possibility may lead to novel signatures with double peaks that can be searched for at the LHC. We study the phenomenology of double peak searches in diboson final states from loop-induced production and decay of a new neutral spin-0 resonance at the LHC. The loop-induced couplings should be mediated by particles carrying color and electroweak charge that after forming bound states will induce a second peak in the diboson invariant mass spectrum near twice their mass. A second peak could be present via loop-induced couplings into gg (dijet), γγ and Zγ final states as well as in the WW and ZZ channels for the case of a pseudoscalar resonance or for scalars with suppressed tree-level coupling to gauge bosons.

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Carena, M., Huang, P., Ismail, A., Low, I., Shah, N. R., & Wagner, C. E. M. (2016). Double peak searches for scalar and pseudoscalar resonances at the LHC. Physical Review D, 94(11). https://doi.org/10.1103/PhysRevD.94.115001

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