Signal versus Background Interference in $H^+\to t\bar b$ Signals for MSSM Benchmark Scenarios

Abdesslam Arhrib; Duarte Azevedo; Rachid Benbrik; Hicham Harouiz; Stefano Moretti; Riley Patrick; Rui Santos

doi:10.1007/JHEP10(2020)209

paper

Signal versus Background Interference in $H^{+} \to t b ˉ$ Signals for MSSM Benchmark Scenarios

arXiv:1905.02635 · doi:10.1007/JHEP10(2020)209

Abstract

In this paper, we investigate sizeable interference effects between a heavy charged Higgs boson signal produced via $g g \to t b ˉ H^{-}$ (+ c.c.) followed by the decay $H^{-} \to b t ˉ$ (+ c.c.) and the irreducible background given by $g g \to t t ˉ b b ˉ$ topologies at the Large Hadron Collider (LHC). We show how such effects could spoil current $H^{\pm}$ searches where signal and background are normally treated separately. The reason for this is that a heavy charged Higgs boson can have a large total width, in turn enabling such interferences, altogether leading to very significant alterations, both at the inclusive and exclusive level, of the yield induced by the signal alone. This therefore implies that currently established LHC searches for such wide charged Higgs bosons require modifications. We show such effects quantitatively using two different benchmark configurations of the minimal realisation of Supersymmetry, wherein such $H^{\pm}$ states naturally exist.

arXiv comment22 pages, 10 figures

Signal versus Background Interference in H+→tbˉ Signals for MSSM Benchmark Scenarios

Abstract

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Signal versus Background Interference in $H^{+} \to t b ˉ$ Signals for MSSM Benchmark Scenarios