Final States with High-Pt Muons
Aim of this long exercise is to
Part 1: study the muon momentum reconstruction
- effect of tracker pitch size in 10-100 GeV Pt muons
- number of tracker layers etc.
- muon chambers granularity
- understand effect of multiple scattering onto Pt resolution
- understand domains where tracker is dominant and muon detector is dominant
Howto:
- use two (three) samples: H->MuMu, (DY->MuMu) and Z'->MuMu
- run Delphes over them
- check muon Pt resolution for different Pt and eta ranges
- compare different configurations to each other, introducing one different feature at a time and checking the effect
- check dimuon mass resolution in barrel (eta<1), intermediate(eta<1.8), endcap(eta<2.5), and very forward(eta>2.5). (find your best way to divide muon pairs into such categories, i.e. "leading muon defines the region", or "eta of dimuon system defines the region" or whatever...)
- DY->MuMu can be used to check muon momentum resolution over a broad muon momentum range if needed
Part 2: study the muon efficiency and acceptance
- focus on H->MuMu and take DY and ttbar as main backgrounds
- understand which acceptance is needed to collect muons such that signal is enhanced and background is still under control
Howto:
- pick the best two configuration you designed in Part 1 and play with acceptance ("best" means the configurations with best invariant mass resolution)
- play with eta range and extract dimuon mass spectra after you also apply trigger (single muon Pt and eta cut on first muon, assume sharp trigger) and event selection (few constraints on muon momentum, eta, dimuon Pt etc...)
- evaluate S/sqrt(B) (rough significance estimate in terms of pseudo-sigmas, discovery-oriented)
