# 24th International Conference on Computing in High Energy & Nuclear Physics

Nov 4 – 8, 2019

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

Nov 4, 2019, 2:00 PM
15m

### Hall G

Oral Track 6 – Physics Analysis

### Speaker

Riley Patrick (The University of Adelaide)

### Description

In this talk I will present an investigation into sizeable interference effects between a {heavy} charged Higgs boson signal produced via $gg\to t\bar b H^-$ (+ c.c.) followed by the decay $H^-\to b\bar t$ (+ c.c.) and the irreducible background given by $gg\to t\bar t b \bar b$ topologies at the Large Hadron Collider (LHC). I will 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. This is shown quantitatively using two different benchmark configurations of the minimal realisation of Supersymmetry, wherein such $H^\pm$ states naturally exist.

Consider for promotion No

### Primary authors

Abdesslam Arhrib (AbdelMalek Essaadi university) Dr Rachid Benbrik (Cadi Ayyad University) Stefano Moretti (Science and Technology Facilities Council STFC (GB)) Riley Patrick (The University of Adelaide) Rui Santos (ISEL)