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arXiv · 1502.04113

Heavy Higgs signal-background interference in gg --> VV in the Standard Model plus real singlet

Nikolas Kauer·Claire O'Brien
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Abstract

For the Standard Model extended with a real scalar singlet field, the modification of the heavy Higgs signal due to interference with the continuum background and the off-shell light Higgs contribution is studied for gg --> ZZ, WW --> 4 lepton processes at the Large Hadron Collider. Interference effects can range from O(10%) to O(1) effects for integrated cross sections. Despite a strong cancellation between the heavy Higgs-continuum and the heavy Higgs-light Higgs interference, the full interference is clearly non-negligible and modifies the heavy Higgs line shape. A |M_VV - M_h2| < Gamma_h2 cut mitigates interference effects to O(10%) or less. A public program that allows to simulate the full interference is presented.

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Nikolas Kauer, Claire O'Brien. 2015-02-13. Heavy Higgs signal-background interference in gg --> VV in the Standard Model plus real singlet. https://doi.org/10.1140/epjc/s10052-015-3586-3

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