Single and Double Electron trigger Efficiencies using the full Run 2 dataset ( CMS DP-2020/016)

This note shows electron trigger performance (L1+HLT) with the full Run 2 data sample, corresponding to an integrated luminosity of 136.1 fb^-1.

Analyzed triggers:

• HLT_Ele(27)32_WPTight_Gsf: standard single electron trigger with tight identification and isolation requirements. The electron transverse momentum is required to be above 27 GeV in 2016 and above 32 GeV in 2017-2018.
• HLT_Ele23_Ele12_CaloIDL_TrackIdL_IsoVL: standard double electron trigger with loose ID and isolation requirements. The transverse momentum of the pT-(sub)leading electron is required to be above 23(12) GeV.

The Tag and Probe technique is used, measuring trigger efficiencies on 𝒁→𝒆𝒆 data samples: 2016 collected data used the 2017 reprocessing of that data, while 2017 and 2018 collected data used the end of year processing of their respective data taking years.

Drell Yan samples simulated with MadGraph5 are used for comparison (NLO for 2016/2017, LO for 2018).

The measured performance combines L1 and HLT efficiency. Others details can be found in the DP note.

Single Electron - pT (2016) Efficiency of HLT_Ele27_WPTight_Gsf trigger with respect to an offline reconstructed electron as a function of the electron transverse momentum, obtained for different pseudorapidity regions using the full 2016 dataset. The region 1.4442 ≤ abs(η) ≤ 1.566 is not included since it corresponds to the transition between barrel and endcap electromagnetic calorimeters and is excluded by many analyses. The bottom panel shows the data to simulation ratio. The efficiency measurements combine L1 and HLT effects Get pdf version Contact: Linda Finco

Single Electron - pT (2017) Efficiency of HLT_Ele32_WPTight_Gsf trigger with respect to an offline reconstructed electron as a function of the electron transverse momentum, obtained for different pseudorapidity regions using the full 2017 dataset. The region 1.4442 ≤ abs(η) ≤ 1.566 is not included since it corresponds to the transition between barrel and endcap electromagnetic calorimeters and is excluded by many analyses. The bottom panel shows the data to simulation ratio. The efficiency measurements combine L1 and HLT effects. Get pdf version Contact: Linda Finco

Single Electron - pT (2018) Efficiency of HLT_Ele32_WPTight_Gsf trigger with respect to an offline reconstructed electron as a function of the electron transverse momentum, obtained for different pseudorapidity regions using the full 2018 dataset. The region 1.4442 ≤ abs(η) ≤ 1.566 is not included since it corresponds to the transition between barrel and endcap electromagnetic calorimeters and is excluded by many analyses. The bottom panel shows the data to simulation ratio. The efficiency measurements combine L1 and HLT effects Get pdf version Contact: Linda Finco

SingleElectron - eta (2016) Efficiency of HLT_Ele27_WPTight_Gsf trigger with respect to an offline reconstructed electron as a function of the electron pseudorapidity, obtained for different ranges of transverse momentum using the full 2016 dataset. The region 1.4442 ≤ abs(η) ≤ 1.566 corresponds to the transition between barrel and endcap electromagnetic calorimeters and is excluded by many analyses. The bottom panel shows the data to simulation ratio. The efficiency measurements combine L1 and HLT effects. Get pdf version Contact: Linda Finco

SingleElectron - eta (2017) Efficiency of HLT_Ele32_WPTight_Gsf trigger with respect to an offline reconstructed electron as a function of the electron pseudorapidity, obtained for different ranges of transverse momentum using the full 2017 dataset. The region 1.4442 ≤ abs(η) ≤ 1.566 corresponds to the transition between barrel and endcap electromagnetic calorimeters and is excluded by many analyses. The bottom panel shows the data to simulation ratio. The efficiency measurements combine L1 and HLT effects. Get pdf version Contact: Linda Finco

SingleElectron - eta (2018) Efficiency of HLT_Ele32_WPTight_Gsf trigger with respect to an offline reconstructed electron as a function of the electron pseudorapidity, obtained for different ranges of transverse momentum using the full 2018 dataset. The region 1.4442 ≤ abs(η) ≤ 1.566 corresponds to the transition between barrel and endcap electromagnetic calorimeters and is excluded by many analyses. The bottom panel shows the data to simulation ratio. The efficiency measurements combine L1 and HLT effects. Get pdf version Contact: Linda Finco

SingleElectron - Nvtx (2016) Efficiency of HLT_Ele27_WPTight_Gsf trigger with respect to an offline reconstructed electron as a function of the number of reconstructed primary vertices, obtained for different pseudorapidity regions using the full 2016 dataset. Electron transverse momentum is required to be above 50 GeV. The region 1.4442 ≤ abs(η) ≤ 1.566 is not included since it corresponds to the transition between barrel and endcap electromagnetic calorimeters and is excluded by many analyses. The bottom panel shows the data to simulation ratio. The efficiency measurements combine L1 and HLT effects. Get pdf version Contact: Linda Finco

SingleElectron - Nvtx (2017) Efficiency of HLT_Ele32_WPTight_Gsf trigger with respect to an offline reconstructed electron as a function of the number of reconstructed primary vertices, obtained for different pseudorapidity regions using the full 2017 dataset. Electron transverse momentum is required to be above 50 GeV. The region 1.4442 ≤ abs(η) ≤ 1.566 is not included since it corresponds to the transition between barrel and endcap electromagnetic calorimeters and is excluded by many analyses. The bottom panel shows the data to simulation ratio. The efficiency measurements combine L1 and HLT effects. In 2017 the majority of the high pileup data came in the later part of the year which was also affected by the pixel DCDC converter issue. Therefore the efficiency loss versus Nvtx is not solely due to increasing pileup. This effect is only significant (at about the 10% level) in the 2.0 < abs(η) < 2.5 range. Get pdf version Contact: Linda Finco

SingleElectron - Nvtx (2018) Efficiency of HLT_Ele32_WPTight_Gsf trigger with respect to an offline reconstructed electron as a function of the number of reconstructed primary vertices, obtained for different pseudorapidity regions using the full 2018 dataset. Electron transverse momentum is required to be above 50 GeV. The region 1.4442 ≤ abs(η) ≤ 1.566 is not included since it corresponds to the transition between barrel and endcap electromagnetic calorimeters and is excluded by many analyses. The bottom panel shows the data to simulation ratio. The efficiency measurements combine L1 and HLT effects. Get pdf version Contact: Linda Finco

DoubleElectron - pT Ele23 (2016) Efficiency of the Ele23 leg of the HLT_Ele23_Ele12 trigger with respect to an offline reconstructed electron as a function of the electron transverse momentum, obtained for different pseudorapidity regions using the full 2016 dataset. The region 1.4442 ≤ abs(η) ≤ 1.566 is not included since it corresponds to the transition between barrel and endcap electromagnetic calorimeters and is excluded by many analyses. The efficiency includes the electron passing the leading threshold of the path’s asymmetric L1_DoubleEG seed. The bottom panel shows the data to simulation ratio. The efficiency measurements combine L1 and HLT effects. Get pdf version Contact: Linda Finco

DoubleElectron - pT - Ele23 (2017) Efficiency of the Ele23 leg of the HLT_Ele23_Ele12 trigger with respect to an offline reconstructed electron as a function of the electron transverse momentum, obtained for different pseudorapidity regions using the full 2017 dataset. The region 1.4442 ≤ abs(η) ≤ 1.566 is not included since it corresponds to the transition between barrel and endcap electromagnetic calorimeters and is excluded by many analyses. The efficiency includes the electron passing the leading threshold of the path’s asymmetric L1_DoubleEG seed. The bottom panel shows the data to simulation ratio. The efficiency measurements combine L1 and HLT effects. Get pdf version Contact: Linda Finco

DoubleElectron - pT Ele23 (2018) Efficiency of the Ele23 leg of the HLT_Ele23_Ele12 trigger with respect to an offline reconstructed electron as a function of the electron transverse momentum, obtained for different pseudorapidity regions using the full 2018 dataset. The region 1.4442 ≤ abs(η) ≤ 1.566 is not included since it corresponds to the transition between barrel and endcap electromagnetic calorimeters and is excluded by many analyses. The efficiency includes the electron passing the leading threshold of the path’s asymmetric L1_DoubleEG seed. The bottom panel shows the data to simulation ratio. The efficiency measurements combine L1 and HLT effects. Get pdf version Contact: Linda Finco

DoubleElectron - pT (2016) Efficiency of the Ele12 leg of the HLT_Ele23_Ele12 trigger with respect to an offline reconstructed electron as a function of the electron transverse momentum, obtained for different pseudorapidity regions using the full 2016 dataset. The region 1.4442 ≤ abs(η) ≤ 1.566 is not included since it corresponds to the transition between barrel and endcap electromagnetic calorimeters and is excluded by many analyses. The bottom panel shows the data to simulation ratio. The efficiency measurements combine L1 and HLT effects. Get pdf version Contact: Linda Finco

DoubleElectron - pT - Ele12 (2017) Efficiency of the Ele12 leg of the HLT_Ele23_Ele12 trigger with respect to an offline reconstructed electron as a function of the electron transverse momentum, obtained for different pseudorapidity regions using the full 2017 dataset. The region 1.4442 ≤ abs(η) ≤ 1.566 is not included since it corresponds to the transition between barrel and endcap electromagnetic calorimeters and is excluded by many analyses. The bottom panel shows the data to simulation ratio. The efficiency measurements combine L1 and HLT effects. Caption Get pdf version Contact: Linda Finco

DoubleElectron - pT - Ele12 (2018) Efficiency of the Ele12 leg of the HLT_Ele23_Ele12 trigger with respect to an offline reconstructed electron as a function of the electron transverse momentum, obtained for different pseudorapidity regions using the full 2018 dataset. The region 1.4442 ≤ abs(η) ≤ 1.566 is not included since it corresponds to the transition between barrel and endcap electromagnetic calorimeters and is excluded by many analyses. The bottom panel shows the data to simulation ratio. The efficiency measurements combine L1 and HLT effects. Get pdf version Contact: Linda Finco

DoubleElectron - eta - Ele23 (2016) Efficiency of the Ele23 leg of the HLT_Ele23_Ele12 trigger with respect to an offline reconstructed electron as a function of the electron pseudorapidity, obtained for different ranges of transverse momentum using the full 2016 dataset. The efficiency includes the electron passing the leading threshold of the path’s asymmetric L1_DoubleEG seed. The region 1.4442 ≤ abs(η) ≤ 1.566 corresponds to the transition between barrel and endcap electromagnetic calorimeters and is excluded by many analyses. The bottom panel shows the data to simulation ratio. The efficiency measurements combine L1 and HLT effects. Get pdf version Contact: Linda Finco

DoubleElectron - eta ele23 (2017) Efficiency of the Ele23 leg of the HLT_Ele23_Ele12 trigger with respect to an offline reconstructed electron as a function of the electron pseudorapidity, obtained for different ranges of transverse momentum using the full 2017 dataset. The efficiency includes the electron passing the leading threshold of the path’s asymmetric L1_DoubleEG seed. The region 1.4442 ≤ abs(η) ≤ 1.566 corresponds to the transition between barrel and endcap electromagnetic calorimeters and is excluded by many analyses. The bottom panel shows the data to simulation ratio. The efficiency measurements combine L1 and HLT effects. Get pdf version Contact: Linda Finco

Double Electron - eta - Ele23 (2018) Efficiency of the Ele23 leg of the HLT_Ele23_Ele12 trigger with respect to an offline reconstructed electron as a function of the electron pseudorapidity, obtained for different ranges of transverse momentum using the full 2018 dataset. The efficiency includes the electron passing the leading threshold of the path’s asymmetric L1_DoubleEG seed. The region 1.4442 ≤ abs(η) ≤ 1.566 corresponds to the transition between barrel and endcap electromagnetic calorimeters and is excluded by many analyses. The bottom panel shows the data to simulation ratio. The efficiency measurements combine L1 and HLT effects. Get pdf version Contact: Linda Finco

DoubleElectron - eta - Ele12 (2016) Efficiency of the Ele12 leg of the HLT_Ele23_Ele12 trigger with respect to an offline reconstructed electron as a function of the electron pseudorapidity, obtained for different ranges of transverse momentum using the full 2016 dataset. The region 1.4442 ≤ abs(η) ≤ 1.566 corresponds to the transition between barrel and endcap electromagnetic calorimeters and is excluded by many analyses. The bottom panel shows the data to simulation ratio. The efficiency measurements combine L1 and HLT effects. Get pdf version Contact: Linda Finco

DoubleElectron - eta - Ele12 (2017) Efficiency of the Ele12 leg of the HLT_Ele23_Ele12 trigger with respect to an offline reconstructed electron as a function of the electron pseudorapidity, obtained for different ranges of transverse momentum using the full 2017 dataset. The region 1.4442 ≤ abs(η) ≤ 1.566 corresponds to the transition between barrel and endcap electromagnetic calorimeters and is excluded by many analyses. The bottom panel shows the data to simulation ratio. The efficiency measurements combine L1 and HLT effects. Get pdf version Contact: Linda Finco

DoubleElectron - eta - Ele12 (2018) Efficiency of the Ele12 leg of the HLT_Ele23_Ele12 trigger with respect to an offline reconstructed electron as a function of the electron pseudorapidity, obtained for different ranges of transverse momentum using the full 2018 dataset. The region 1.4442 ≤ abs(η) ≤ 1.566 corresponds to the transition between barrel and endcap electromagnetic calorimeters and is excluded by many analyses. The bottom panel shows the data to simulation ratio. The efficiency measurements combine L1 and HLT effects. Get pdf version Contact: Linda Finco

DoubleElectron - Nvtx (2016) Efficiency of the HLT_Ele23_Ele12 trigger with respect to an offline reconstructed electron as a function of the number of reconstructed primary vertices, obtained for different pseudorapidity regions using the full 2016 dataset. Electron transverse momentum is required to be above 50 GeV. The region 1.4442 ≤ abs(η) ≤ 1.566 is not included since it corresponds to the transition between barrel and endcap electromagnetic calorimeters and is excluded by many analyses. The bottom panel shows the data to simulation ratio. The efficiency measurements combine L1 and HLT effects. Get pdf version Contact: Linda Finco

DoubleElectron - Nvtx (2017) Efficiency of the HLT_Ele23_Ele12 trigger with respect to an offline reconstructed electron as a function of the number of reconstructed primary vertices, obtained for different pseudorapidity regions using the full 2017 dataset. Electron transverse momentum is required to be above 50 GeV. The region 1.4442 ≤ abs(η) ≤ 1.566 is not included since it corresponds to the transition between barrel and endcap electromagnetic calorimeters and is excluded by many analyses. The bottom panel shows the data to simulation ratio. The efficiency measurements combine L1 and HLT effects. In 2017 the majority of the high pileup data came in the later part of the year which was also affected by the pixel DCDC converter issue. Therefore the efficiency loss versus Nvtx is not solely due to increasing pileup. This effect is only significant in the 2.0 < abs(η) < 2.5 range. Get pdf version Contact: Linda Finco

DoubleElectron - Nvtx (2018) Efficiency of the HLT_Ele23_Ele12 trigger with respect to an offline reconstructed electron as a function of the number of reconstructed primary vertices, obtained for different pseudorapidity regions using the full 2018 dataset. Electron transverse momentum is required to be above 50 GeV. The region 1.4442 ≤ abs(η) ≤ 1.566 is not included since it corresponds to the transition between barrel and endcap electromagnetic calorimeters and is excluded by many analyses. The bottom panel shows the data to simulation ratio. The efficiency measurements combine L1 and HLT effects. Get pdf version Contact: Linda Finco

SingleElectron - pT Efficiency of the Single Electron HLT path (HLT_Ele27_WPTight_Gsf in 2016, HLT_Ele32_WPTight_Gsf in 2017 and 2018) with respect to an offline reconstructed electron as a function of the electron transverse momentum, obtained for 0.0 < abs(η) < 1.444, using the full Run 2 dataset. The different shape in 2016 with respect to 2017 and 2018 is mainly due to the different energy threshold, at 27 GeV instead of 32 GeV. The efficiency measurements combine L1 and HLT effects. Get pdf version Contact: Linda Finco

SingleElectron - pT Efficiency of the Single Electron HLT path (HLT_Ele27_WPTight_Gsf in 2016, HLT_Ele32_WPTight_Gsf in 2017 and 2018) with respect to an offline reconstructed electron as a function of the electron transverse momentum, obtained for 1.566 < abs(η) < 2.0, using the full Run 2 dataset. The different shape in 2016 with respect to 2017 and 2018 is mainly due to the different energy threshold, at 27 GeV instead of 32 GeV, and to the retuning of the identification criteria used as working point. The efficiency measurements combine L1 and HLT effects. Get pdf version Contact: Linda Finco

SingleElectron - pT Efficiency of the Single Electron HLT path (HLT_Ele27_WPTight_Gsf in 2016, HLT_Ele32_WPTight_Gsf in 2017 and 2018) with respect to an offline reconstructed electron as a function of the electron transverse momentum, obtained for 2.0 < abs(η) < 2.5, using the full Run 2 dataset. The different shape in 2016 with respect to 2017 and 2018 is mainly due to the different energy threshold, at 27 GeV instead of 32 GeV, and to the retuning of the identification criteria used as working point. The efficiency measurements combine L1 and HLT effects. Get pdf version Contact: Linda Finco

SingleElectron - Nvtx Efficiency of the Single Electron HLT path (HLT_Ele27_WPTight_Gsf in 2016, HLT_Ele32_WPTight_Gsf in 2017 and 2018) with respect to an offline reconstructed electron as a function of the number of reconstructed primary vertices, obtained for 0.0 < abs(η) < 1.444, using the full Run 2 dataset. The electron transverse momentum is required to be above 50 GeV. The efficiency measurements combine L1 and HLT effects. Get pdf version Contact: Linda Finco

SingleElectron - Nvtx Efficiency of the Single Electron HLT path (HLT_Ele27_WPTight_Gsf in 2016, HLT_Ele32_WPTight_Gsf in 2017 and 2018) with respect to an offline reconstructed electron as a function of the number of reconstructed primary vertices, obtained for 1.556 < abs(η) < 2.0, using the full Run 2 dataset. The electron transverse momentum is required to be above 50 GeV. The efficiency measurements combine L1 and HLT effects. The lower efficiency in 2016 with respect to 2017 and 2018 is mainly due to the retuning of the identification criteria used as working point. Get pdf version Contact: Linda Finco

SingleElectron - Nvtx Efficiency of the Single Electron HLT path (HLT_Ele27_WPTight_Gsf in 2016, HLT_Ele32_WPTight_Gsf in 2017 and 2018) with respect to an offline reconstructed electron as a function of the number of reconstructed primary vertices, obtained for 2.0 < abs(η) < 2.5, using the full Run 2 dataset. The electron transverse momentum is required to be above 50 GeV. The efficiency measurements combine L1 and HLT effects. The lower efficiency in 2016 with respect to 2017 and 2018 is mainly due to the retuning of the identification criteria used as working point. In 2017 the majority of the high pileup data came in the later part of the year which was also affected by the pixel DCDC converter issue. Therefore the efficiency loss versus Nvtx in 2017 is not solely due to increasing pileup. Get pdf version Contact: Linda Finco

DoubleElectron - pT - Ele23 Efficiency of the Ele23 leg of the HLT_Ele23_Ele12 trigger with respect to an offline reconstructed electron as a function of the electron transverse momentum, obtained for 0.0 < abs(η) < 1.444, using the full Run 2 dataset. The efficiency includes the electron passing the leading threshold of the path’s asymmetric L1_DoubleEG seed. The efficiency measurements combine L1 and HLT effects. Get pdf version Contact: Linda Finco

DoubleElectron - pT - Ele23 Efficiency of the Ele23 leg of the HLT_Ele23_Ele12 trigger with respect to an offline reconstructed electron as a function of the electron transverse momentum, obtained for 1.566 < abs(η) < 2.0, using the full Run 2 dataset. The efficiency includes the electron passing the leading threshold of the path’s asymmetric L1_DoubleEG seed. The efficiency measurements combine L1 and HLT effects. Get pdf version Contact: Linda Finco

DoubleElectron - pT - Ele23 Efficiency of the Ele23 leg of the HLT_Ele23_Ele12 trigger with respect to an offline reconstructed electron as a function of the electron transverse momentum, obtained for 2.0 < abs(η) < 2.5, using the full Run 2 dataset. The efficiency includes the electron passing the leading threshold of the path’s asymmetric L1_DoubleEG seed. The efficiency measurements combine L1 and HLT effects. Get pdf version Contact: Linda Finco

DoubleElectron - pT - Ele12 Efficiency of the Ele12 leg of the HLT_Ele23_Ele12 trigger with respect to an offline reconstructed electron as a function of the electron transverse momentum, obtained for 0.0 < abs(η) < 1.444, using the full Run 2 dataset. The efficiency measurements combine L1 and HLT effects. Get pdf version Contact: Linda Finco

DoubleElectron - pT - Ele12 Efficiency of the Ele12 leg of the HLT_Ele23_Ele12 trigger with respect to an offline reconstructed electron as a function of the electron transverse momentum, obtained for 1.566 < abs(η) < 2.0, using the full Run 2 dataset. The efficiency measurements combine L1 and HLT effects. Get pdf version Contact: Linda Finco

DoubleElectron - pT - Ele12 Efficiency of the Ele12 leg of the HLT_Ele23_Ele12 trigger with respect to an offline reconstructed electron as a function of the electron transverse momentum, obtained for 2.0 < abs(η) < 2.5, using the full Run 2 dataset. The efficiency measurements combine L1 and HLT effects. Get pdf version Contact: Linda Finco

DoubleElectron - Nvtx Efficiency of the HLT_Ele23_Ele12 trigger with respect to an offline reconstructed electron as a function of the number of reconstructed primary vertices, obtained for 0.0 < abs(η) < 1.444, using the full Run 2 dataset. Electron transverse momentum is required to be above 50 GeV. The efficiency measurements combine L1 and HLT effects. Get pdf version Contact: Linda Finco

DoubleElectron - Nvtx Efficiency of the HLT_Ele23_Ele12 trigger with respect to an offline reconstructed electron as a function of the number of reconstructed primary vertices, obtained for 1.566 < abs(η) < 2.0, using the full Run 2 dataset. Electron transverse momentum is required to be above 50 GeV. The efficiency measurements combine L1 and HLT effects. Get pdf version Contact: Linda Finco

DoubleElectron - Nvtx Efficiency of the HLT_Ele23_Ele12 trigger with respect to an offline reconstructed electron as a function of the number of reconstructed primary vertices, obtained for 2.0 < abs(η) < 2.5, using the full Run 2 dataset. Electron transverse momentum is required to be above 50 GeV. The efficiency measurements combine L1 and HLT effects. In 2017 the majority of the high pileup data came in the later part of the year which was also affected by the pixel DCDC converter issue. Therefore the efficiency loss versus Nvtx in 2017 is not solely due to increasing pileup. Get pdf version Contact: Linda Finco

-- ElisabettaGallo - 2020-03-22