ExoticsHiddenValleyLLNPResults

Introduction

ATL-PHYS-PUB-2009-082

Figures

All figure numbers refer to their numbering within the ATL-PHYS-PUB-2009-082 note.

Detector Signatures

Figure 3 (Left): π_v decay probability in Inner Detector Calorimeters and Muon Spectrometer

Figure 3 (Right): fraction of π_v that have β_πv less than the abscissa value

Figure 4: ATLANTIS Display of reconstructed event properties for two π_v decays: A in the barrel muon spectrometer and B in the hadronic calorimeter

Figure 5: ATLANTIS Display of a π_v decay in the barrel muon spectrometer

Figure6: Lego plot of the enerty deposition in the calorimeter cells around the jet axis (0,0) for π_v's decaying in the HCal

Figure 7: ATLANTIS display of the reconstructed event properties for two π_v decays in the TRT, where only Silicon hits inside the RoI are shown.

Efficiency of Current ATLAS triggers

Figure 8: Fraction of muon RoIs found at L1 and after applying muFast and muComb

New Trigger Objects (Decays in the Muon Spectrometer)

Figure 9: Average number of L1 muon RoIs vs π_v decay distance

Figure 10: Number of L1 muon RoIs contained in a cone of ΔR=0.4 in events that pass the L1_3MU6 trigger

New Trigger Objects (Decays in the Calorimeters)

Figure 11: Energy distribution for jets that originate from π_v's that decay inside of the barrel HCal where (0,0) is the jet axis

Figure 12: Mean value of log₁₀(E_HAD/E_EM) for all jets coming from π_v decays as a function of the π_v decay position in the barrel HCal

Figure 13: Distribution of log₁₀(E_HAD/E_EM) for all jets in events that pass the L1_TAU40 trigger

Figure 14: log₁₀(E_HAD/E_EM) for all jets coming from π_v decays as a function of the π_v decay position in the barrel HCal and the projection showing the second peak from decays in the HCal

Figure 15: Nubmer of tracks reconstructed by the L2 tracking algorithm SiTrack, using a track p_T cut of 1 GeV for jets with log₁₀(E_HAD/E_EM) > 1

New Trigger Objects (Decays in the Inner Detector)

Figure 16: Number of reconstructed tracks (p_T > 1 GeV) associated with each L2 jet using the SiTrack algorithm in a (Δη x Δφ) region of (0.2 x 0.2) around the jet axis

Trigger Timing Issues (Muon RoI Cluster Trigger)

Figure 18 (Left): Distribution of Δt shifts for π_v's that decay in the barrel Muon Spectrometer

Figure 18 (Right): Distribution of Δt shifts for π_v's that decay in the endcap Muon Spectrometer

Figure 20: Fraction of π_v's with a Δt shift < 6 ns as a function of the π_v mass

Trigger Timing Issues (Calorimeter Energy Ratio Trigger)

Figure 21: Δt distriubtion for π_v's that decay in the HCal for m_h=140 GeV and m_πv=40 GeV

Figure 22: Fraction of π_v's that decay in the HCal with a Δt shift < 3ns as a function of the π_v mass

Dependence of Trigger Efficiencies on the π_v Decay Length

Figure 23 (Left): Efficiency of the muon RoI cluster trigger as a function of the π_v decay position for decays in the barrel

Figure 23 (Right): Efficiency of the muon RoI cluster trigger as a function of the π_v decay position for decays in the endcap

Figure 24 (Left): Efficiency for the log₁₀(E_HAD/E_EM) trigger as a function of the π_v decay position for decays in the barrel

Figure 24 (Right): Efficiency for the log₁₀(E_HAD/E_EM) trigger as a function of the π_v decay position for decays in the endcap

Figure 25: Efficiency for the Trackless Jet + muon trigger as a function of the π_v decay position for decays in the barrel region

Figure 26: h->π_vπ_v events accepted by our long-lived particle triggers vs the π_v lifetime for m_h=140 GeV and m_πv=40 GeV. Left axis: fraction of events accepted. Right axis: number of events for an integrated luminosity of 100 pb^-1 assuming Br(h->π_vπ_v)=100%

Responsible: DanielVentura
Last reviewed by: Never reviewed