Abstract
In this letter, we investigate the case of a twin peak around the observed 125 GeV scalar resonance, using di-Higgs production processes at both LHC and e+e− Linear Colliders. We have shown that both at LHC and Linear Collider the triple Higgs couplings play an important role to identify this scenario; and also that this scenario can be distinguishable from any Standard Model extension by extra massive particles which might modify the triple Higgs coupling. We also introduce a criterion that can be used to rule out the twin peak scenario.
Highlights
We investigate the case of a twin peak around the observed 125 GeV scalar resonance, using di-Higgs production processes at both LHC and e+e− Linear Colliders
We have shown that both at LHC and Linear Collider the triple Higgs couplings play an important role to identify this scenario; and that this scenario can be distinguishable from any Standard Model extension by extra massive particles which might modify the triple Higgs coupling
For processes with di-Higgs final states (pp(e−e+) → hh + X ), the triple Higgs couplings may play an important role, and these processes can be useful to distinguish between the cases of one scalar or two degenerate ones around the observed
Summary
We investigate the case of a twin peak around the observed 125 GeV scalar resonance, using di-Higgs production processes at both LHC and e+e− Linear Colliders. For processes with di-Higgs final states (pp(e−e+) → hh + X ), the triple Higgs couplings may play an important role, and these processes can be useful to distinguish between the cases of one scalar or two degenerate ones around the observed
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