
META TOPICPARENT 
name="https://twiki/cern/ch/twiki/bin/view/LHCPhysics.LHCHXSWGExoticDecay" 


Abstract 

< <  In this study, we devise a search strategy for the exotic decay of the 125 GeV Higgs boson in the $\gamma\gamma+\MET$ final state. The studied final state comes in two different topologies: resonant and nonresonant. In the resonant case, the Higgs decays into two scalars, one being undetected and the other decaying resonantly into two photons. The nonresonant case, based on low scale SUSY breaking models, the Higgs decays into two neutralinos, each subsequently decaying into a photon and a gravitino. We estimate the sensitivity of these searches using a DELPHES detector simulation, and targeting $100$ fb$^{1}$ of $\sqrt{s}=14$ TeV $pp$ data from the LHC. 
> >  In this study, we devise a search strategy for the exotic decay of the 125 GeV Higgs boson in the $\gamma\gamma+MET$ final state. The studied final state comes in two different topologies: resonant and nonresonant. In the resonant case, the Higgs decays into two scalars, one being undetected and the other decaying resonantly into two photons. The nonresonant case, based on low scale SUSY breaking models, the Higgs decays into two neutralinos, each subsequently decaying into a photon and a gravitino. We estimate the sensitivity of these searches using a DELPHES detector simulation, and targeting $100$ fb$^{1}$ of $\sqrt{s}=14$ TeV $pp$ data from the LHC. 

Figures from ggMET


< < 

pdf 
Figure 1a: Feynman diagrams for the nonresonant signal scenarios 

> > 

pdf 
Figure 1a: Feynman diagrams for the nonresonant signal scenarios (Based on low scale SUSY breaking models, the Higgs decays into two neutralinos, each subsequently decaying into a photon and a gravitino) 

 

< < 

pdf 
Figure 1a: Feynman diagrams for the resonant signal scenarios 

> > 

pdf 
Figure 1b: Feynman diagrams for the resonant signal scenarios (Higgs decays into two scalars, one being undetected and the other decaying resonantly into two photons) 

 

< < 

pdf 
Figure 1a: Efficiency 

> > 

pdf 
Figure 2: signal selection efficiency after triggers selection v.s. mass for different signal scenarios and types 

 

< < 

pdf 
Figure 1a: MT 

 

< < 

pdf 
Figure 1a: MET 

> > 

pdf 
Figure 3: Missing transverse distribution of signal and background for the gluongluon production mode 

 

< < 

pdf 
Figure 1a: deltaPhi between di photon 

> > 

pdf 
Figure 4: Distribution of deltaPhi between di photon for signal and background for the gluongluon production mode 

 

< < 

pdf 
Figure 1a: Photons invariant mass 

> > 

pdf 
Figure 5: MT distribution (MT of $\gamma\gamma+MET$, $\mu\mu$) of signal and backgrounds for the ZH production mode 

 

< < 

pdf 
Figure 1a: delta phi between di photon and di muons 

> > 

pdf 
Figure 6: Photons invariant mass distribution of signal and backgrounds for the ZH production mode 

 

< < 

pdf 
Figure 1a: Di muon invariant mass 

> > 

pdf 
Figure 7: delta phi between di photon and di muons distribution of signal and backgrounds for the ZH production mode 

 

> > 

pdf 
Figure 8: Di muon invariant mass distribution of signal and backgrounds for the ZH production mode 

 

< < 

pdf 
Figure 1a: Pt of dimuon 

 

> > 

pdf 
Figure 9: Pt of dimuon for signal and backgrounds for the ZH production mode 

 

< < 

pdf 
Figure 1a: ∆φ between Diphoton and MET 

 

> > 

pdf 
Figure 10: ∆φ between Diphoton and MET distribution of signal and backgrounds for the ZH production mode 

 

< < 

pdf 
Figure 1a: leading Photon Pt 

 

> > 

pdf 
Figure 11: leading Photon Pt distribution of signal and backgrounds for the ZH production mode 

 

> > 

pdf 
Figure 12: subleading Photon Pt distribution of signal and backgrounds for the ZH production mode 

 

< < 

pdf 
Figure 1a: Transverse Mass 

> > 

pdf 
Figure 13: Transverse Mass distribution of signal and backgrounds for the ZH production mode 

 

< < 

pdf 
Figure 1a: subleading Photon Pt 

> > 

pdf 
Figure 14: Significance plots for different trigger scenarios in the gluon fusion analysis 

 

< < 

pdf 
Figure 1a: Significance plots for different trigger scenarios in the gluon fusion analysis 

> > 

pdf 
Figure 15: Significance plots for different trigger and signal scenarios in the gluon fusion analysis 

 

< < 

pdf 
Figure 1a: Significance plots for different trigger scenarios in the gluon fusion analysis 

> > 

pdf 
Figure 16: 5σ branching ratios for the ggF channel, for resonant (in red) and nonresonant (in black) final states, using the γ + E/T trigger.. 

 

< < 

pdf 
Figure 1a: 5σ branching ratios for the ggF channel, for resonant (in red) and nonresonant (in black) final states, using the γ + E/T trigger.. 

pdf 
Figure 1a: Branching ratios for 95% confidence level exclusion in the ZH case, resonant and nonresonant topologies, requiring at least one photon (Nγ ≥ 1, in green and blue, respectively) and at least two photons (Nγ ≥ 2 in black and red, respectively). The shaded areas correspond to a variation in systematics up to 10% 

> > 

pdf 
Figure 17: Branching ratios for 95% confidence level exclusion in the ZH case, resonant and nonresonant topologies, requiring at least one photon (Nγ ≥ 1, in green and blue, respectively) and at least two photons (Nγ ≥ 2 in black and red, respectively). The shaded areas correspond to a variation in systematics up to 10% 

 