determination of electron and muon tracking effeciency

[Deepanjali Goswami]

Hi,

I am having some doubt regarding electron and muon tracking efficiency in CMS card.

I have copied a part of the card for efficiency below:

# set EfficiencyFormula {efficiency formula as a function of eta and pt}

# tracking efficiency formula for electrons
set EfficiencyFormula { (pt <= 0.1) * (0.00) +

(abs(eta) <= 1.5) * (pt > 0.1 && pt <= 1.0) * (0.73) +
(abs(eta) <= 1.5) * (pt > 1.0 && pt <= 1.0e2) * (0.95) +
(abs(eta) <= 1.5) * (pt > 1.0e2) * (0.99) +

(abs(eta) > 1.5 && abs(eta) <= 2.5) * (pt > 0.1 && pt <= 1.0) * (0.50) +
(abs(eta) > 1.5 && abs(eta) <= 2.5) * (pt > 1.0 && pt <= 1.0e2) * (0.83) +
(abs(eta) > 1.5 && abs(eta) <= 2.5) * (pt > 1.0e2) * (0.90) +
(abs(eta) > 2.5) * (0.00)}

}

##########################
# Muon tracking efficiency
##########################

module Efficiency MuonTrackingEfficiency {

set InputArray ParticlePropagator/muons
set OutputArray muons

# set EfficiencyFormula {efficiency formula as a function of eta and pt}

# tracking efficiency formula for muons
set EfficiencyFormula { (pt <= 0.1) * (0.00) +

(abs(eta) <= 1.5) * (pt > 0.1 && pt <= 1.0) * (0.75) +
(abs(eta) <= 1.5) * (pt > 1.0) * (0.99) +

(abs(eta) > 1.5 && abs(eta) <= 2.5) * (pt > 0.1 && pt <= 1.0) * (0.70) +
(abs(eta) > 1.5 && abs(eta) <= 2.5) * (pt > 1.0) * (0.98) +
(abs(eta) > 2.5) * (0.00)}

}

########################################

Am I correct if I say the extreme right column is for efficiency corresponding to the cut applied just listed in left side of
efficiency?

I hope you will kindly give me the answer.

Thanking you.
Best,
Deepanjali

[Michele Selvaggi]

yes, for instance:

(abs(eta) > 1.5 && abs(eta) <= 2.5) * (pt > 0.1 && pt <= 1.0) * (0.70) 

means that 70% efficiency is applied if muon has

• 1.5 <|abs(eta)|<2.5, and
• 0.1 < pT < 1.0 GeV

[Deepanjali Goswami]

Thank you very much..!