CMS Detector Card for Delphes

Detector fiducial acceptance

• tracker : eta <= 2.5
• calorimeter (barrel) : eta <= 1.7
• calorimeter (end-cap) : eta <= 3.0
• calorimeter (fordward) : eta <= 5.0
• muon chamber : eta < 2.4

attachment/wiki/DetectorCard/accept.gif

Hadronic calorimeter

sigma/E = C + N/E + S/\sqrt{E}, E in GeV

Electromagnetic calorimeter

sigma/E = C + N/E + S/\sqrt{E}, E in GeV

Muon smearing

Tracker

Tracker PT min =

Tracker efficiencies

TRACK_radius 129 radius of the BField coverage, in cm
TRACK_length 300 half-length of the BField coverage, in cm
TRACK_bfield_x 0 X component of the BField, in T
TRACK_bfield_y 0 Y component of the BField, in T
TRACK_bfield_z 3.8 Z component of the BField, in T

Isolation criteria for leptons

PT thresholds

Jet reconstruction algorithm

B-tagging

Delphes describes b-tagging algorithms through 4 functions of two variables pT (x) and Eta (y) :

• b-tagging efficiencies

[K]*pow([alpha]*x,[beta])/(1+pow([alpha]*x,[beta]))
K = 0.828 alpha = 0.048 beta = 2.386

• mistag for c-jets

[0]*x*exp([1]*x*x*x*x+[2]*x*x+[3]*x+[4]
[0]=0.40 [1]=-2.19 [2]=2.79 [3]=3.01 [4]=-2.70

• mistag for gluon-jets and light-jets

[0]*x*exp([1]*x^6+[2]*x5+[3]*x^4+[4]*x3+[5]*x^{2+[6]*x+[7]
[0]= 0.0036 [1]= -78.22 [2]= 129.81 [3]=-44.16 [4]=-4.13 [5]=0.49 [6]=1.25 [7]=0.59}