TABLE 2 |
Barrel |
Endcap |
All electrons |
|
|
L1 Seed to Electrons Efficiency |
|
|
HLT to Electrons Efficiency |
|
|
HLT to L1 Seed Efficiency |
|
|
The L1 seed threshold should be at about 8 GeV, with the fit report a threshold of about 9 GeV.
The fit for
has been performed only on data points above 12, ignoring the "wiggle" at low
. Reading off the value of p0 from the fits, we have at high transverse momentum
We should expect that
. From Table 2, we obtain
for the barrel, and
for the endcap.
Comparing the plots shown above, we see that the slopes of the trigger efficiency for the L1 seed and the HLT begin at different transverse momenta: around 5 GeV for the former and 12 GeV for the latter. This accounts for the wiggle that we see in the plot of
: at low transverse momentum, both the L1 seed and the HLT have similar efficiencies with respect to all PAT electrons. But between 5 and 12 GeV, the L1 seed is increasingly likely to pass electrons, while the HLT still has the same efficiency as before, leading to a dip in
.