Sgoldstino signature in hh, W + W − and ZZ spectra at the LHC
| Autor: | D. S. Gorbunov, Sergei Demidov, E. Kriukova |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Physics
Nuclear and High Energy Physics Particle physics Large Hadron Collider Supersymmetry breaking scale 010308 nuclear & particles physics Physics beyond the Standard Model Scalar (mathematics) High Energy Physics::Phenomenology FOS: Physical sciences hep-ph 01 natural sciences Supersymmetry breaking Standard Model High Energy Physics - Phenomenology High Energy Physics - Phenomenology (hep-ph) Supersymmetry Phenomenology Sgoldstino 0103 physical sciences Higgs boson lcsh:QC770-798 lcsh:Nuclear and particle physics. Atomic energy. Radioactivity High Energy Physics::Experiment 010306 general physics Particle Physics - Phenomenology |
| Zdroj: | Journal of High Energy Physics Journal of High Energy Physics, Vol 2020, Iss 5, Pp 1-26 (2020) |
| Popis: | In a supersymmetric extension of the Standard Model of particle physics (SM) with low scale of supersymmetry breaking, sgoldstino of (sub)TeV mass can be observed at the Large Hadron Collider (LHC) as a peak in diboson mass spectra. Moreover, as a singlet with respect to the SM gauge group, scalar sgoldstino can mix with the SM-like Higgs boson and interfere in all neutral channels providing with the promising signatures of new physics if superpartners are heavy. Sgoldstino couplings to the SM particles are determined by the pattern of soft supersymmetry breaking parameters. Here we concentrate on the cases with a noticeable sgoldstino contribution to di-Higgs channel. Having found a phenomenologically viable region in the model parameter space where scalar sgoldstino, produced at the LHC in gluon fusion, decays into a pair of the lightest Higgs boson we give predictions for corresponding cross section. Using the results of the LHC searches for scalar resonances we place bounds on the supersymmetry breaking scale $\sqrt{F}$ in this region of parameter space. Remarkably, in this region sgoldstino may also be observed in $W^+W^-$ and $ZZ$ channels, yielding independent signatures, since their signal strengths are related to that of di-Higgs channel. Comment: 25 pages, 10 figures |
| Databáze: | OpenAIRE |
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