Performance of JetMET high level trigger algorithms in the CMS experiment using proton-proton collisions data at sqrt(s) = 13 TeV during Run-2 (CMS DP-2022/063)

The performance of the high level trigger (HLT) algorithms involving jets and missing transverse momentum (MET or pTmiss) used in the CMS experiment are studied using full Run-2 luminosity of 137.5 fb−1. The analysed proton-proton collision dataset, having centre of mass energy 13 TeV, is recorded using orthogonal trigger algorithms, namely the isolated single muon or single electron triggers. The results are presented using trigger efficiency, defined as the fraction of collision events passing selections on HLT or online objects, plotted as a function of the transverse momenta (pT) reconstructed offline. The efficiency vs. pileup is also shown in case of the pTmiss triggers.

More details can be found in the DP-2022/063 note.

JME_singlejet500.png

The event selection efficiency for
requiring the presence of at least
one HLT PF jet having transverse
momentum (pT) greater than 500
GeV, the lowest unprescaled
threshold, is shown as a function of
the pT of the offline PF jet in the
event. The three different curves
represent data collected in the
years 2016, 2017 and 2018. The
slight variation in turn-on is due to
differences in offline jet energy
scale calibrations.
Get pdf version

Contact: Pallabi Das

JME_ht1050.png

The event selection efficiency for
requiring the HLT scalar energy
sum (HT) greater than 900 GeV in
2016 and 1050 GeV in 2017, 2018,
which correspond to the lowest
unprescaled thresholds, is shown as
a function of the offline HT. The
1050 GeV trigger is absent during
2016. The increased threshold in
subsequent years is used to limit
event acceptance with increasing
pileup. The 2016 trigger efficiency
also suffers from an effect due to
Level-1 trigger seed firmware due
to which the plateau does not
reach 100%.

Get pdf version

Contact: Pallabi Das

JME_ofllineCorrected_vs_HLTPF.png

The event selection efficiency for
requiring the lowest unprescaled
threshold HLT pTmiss triggers for the
years 2016, 2017 and 2018 is shown
as a function of the offline
corrected pTmiss which takes into
account jet energy scale
corrections into the p Tmiss
calculation. The online threshold
was increased after 2016 to limit
event acceptance due to pileup.

Get pdf version

Contact: Pallabi Das

JME_rawVsCorrected.png

The event selection efficiencies
are compared by requiring the
same threshold on nominal and
corrected HLT pTmiss as a function
of the offline corrected pTmiss in the
year 2018. The HLT corrected pTmiss
provides better turn-on at the
expense of increased trigger rate.

Get pdf version

Contact: Pallabi Das

JME_2018met_corrected.png

The event selection efficiencies
are compared by requiring three
different thresholds on nominal
HLT pTmiss as a function of the
offline corrected pTmiss in the year
2018. The trigger turn-on curves
behave consistently.

Get pdf version

Contact: Pallabi Das

JME_npv2016_corrected.png

The event selection efficiencies as
a function of pileup are compared
between two thresholds
determined using fixed efficiency
values (80% and 95%) against the
offline corrected pTmiss in the year
2016, referring to slide 6. The
threshold at HLT applied on PF
pTmiss is 170 GeV. Here we assume
that the trigger efficiency plateau
is reached at the chosen offline
pTmiss threshold. It is observed that
with increasing pileup the
efficiency becomes worse.

Get pdf version

Contact: Pallabi Das

JME_npv2017_corrected.png

The event selection efficiencies as
a function of pileup are compared
between two thresholds
determined using fixed efficiency
values (80% and 95%) against the
offline corrected pTmiss in the year
2017, referring to slide 6. The
threshold at HLT applied on PF
pTmiss is 250 GeV. Here we assume
that the trigger efficiency plateau
is reached at the chosen offline
pTmiss threshold. It is observed that
with increasing pileup the
efficiency becomes worse.

Get pdf version

Contact: Pallabi Das

JME_npv2018_corrected.png

The event selection efficiencies as
a function of pileup are compared
between two thresholds
determined using fixed efficiency
values (80% and 95%) against the
offline corrected pTmiss in the year
2018, referring to slide 6. The
threshold at HLT applied on PF
pTmiss is 200 GeV. Here we assume
that the trigger efficiency plateau
is reached at the chosen offline
pTmiss threshold. It is observed that
with increasing pileup the
efficiency becomes worse.

Get pdf version

Contact: Pallabi Das



-- MilosDjordjevic - 2022-11-29
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PDFpdf JME_2018met_corrected.pdf r1 manage 17.0 K 2022-11-29 - 14:24 MilosDjordjevic  
PNGpng JME_2018met_corrected.png r1 manage 84.8 K 2022-11-29 - 14:24 MilosDjordjevic  
PDFpdf JME_ht1050.pdf r1 manage 17.7 K 2022-11-29 - 14:25 MilosDjordjevic  
PNGpng JME_ht1050.png r1 manage 90.4 K 2022-11-29 - 14:25 MilosDjordjevic  
PDFpdf JME_npv2016_corrected.pdf r1 manage 16.0 K 2022-11-29 - 14:25 MilosDjordjevic  
PNGpng JME_npv2016_corrected.png r1 manage 79.2 K 2022-11-29 - 14:25 MilosDjordjevic  
PDFpdf JME_npv2017_corrected.pdf r1 manage 16.4 K 2022-11-29 - 14:25 MilosDjordjevic  
PNGpng JME_npv2017_corrected.png r1 manage 85.4 K 2022-11-29 - 14:25 MilosDjordjevic  
PDFpdf JME_npv2018_corrected.pdf r1 manage 15.8 K 2022-11-29 - 14:25 MilosDjordjevic  
PNGpng JME_npv2018_corrected.png r1 manage 84.7 K 2022-11-29 - 14:26 MilosDjordjevic  
PDFpdf JME_ofllineCorrected_vs_HLTPF.pdf r1 manage 16.8 K 2022-11-29 - 14:26 MilosDjordjevic  
PNGpng JME_ofllineCorrected_vs_HLTPF.png r1 manage 87.2 K 2022-11-29 - 14:26 MilosDjordjevic  
PDFpdf JME_rawVsCorrected.pdf r1 manage 16.1 K 2022-11-29 - 14:26 MilosDjordjevic  
PNGpng JME_rawVsCorrected.png r1 manage 79.0 K 2022-11-29 - 14:26 MilosDjordjevic  
PDFpdf JME_singlejet500.pdf r1 manage 17.0 K 2022-11-29 - 14:27 MilosDjordjevic  
PNGpng JME_singlejet500.png r1 manage 80.4 K 2022-11-29 - 14:27 MilosDjordjevic  
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