For more detailed regarding the approved plots, please contact: Luca Mastrolorenzo
luca.mastrolorenzo@llrNOSPAMPLEASE.in2p3.fr
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Electron/Gamma average footprint taken from data: fraction of the total energy in each ECAL trigger tower for Electron candidates averaged over a large statistics. A 9x9 trigger tower region centred on the most energetic trigger towers is shown. Contact: sauvan@llrNOSPAMPLEASE.in2p3.fr |
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Tau average footprint taken from data: fraction of the total energy in each trigger tower grouping the ECAL and the HCAL for Tau candidates averaged over a large statistics. A 9x9 trigger tower region centred on the most energetic trigger towers is shown. |
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Typical footprint of a tau decaying into one prong, taken from data. The energy deposited in each ECAL+HCAL trigger tower is shown inside a 9x9 trigger tower region centred on the seed of the cluster. The impact point of the charged hadron on the inner surface of the calorimeter is also shown. |
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Typical footprint of a tau decaying into one prong + pi zero, taken from data. The energy deposited in each ECAL+HCAL trigger tower is shown inside a 9x9 trigger tower region centred on the seed of the cluster. The impact point of the charged hadron and photons on the inner surface of the calorimeter are also shown. |
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Typical footprint of a tau decaying into three prongs, taken from data. The energy deposited in each ECAL+HCAL trigger tower is shown inside a 9x9 trigger tower region centred on the seed of the cluster. The impact point of the charged hadrons on the inner surface of the calorimeter are also shown |
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Level-1 tau trigger efficiency as a function of the offline tau calorimetric transverse energy for taus in the barrel (black), pseudorapidity region [-1.5,1.5], and in the endcaps (red), pseudorapidity region [1.5,2.3] v [-1.5,-2.3], for a level-1 transverse energy threshold of 30 GeV. The stage-2 level-1 trigger upgrade tau reconstruction algorithm performs first a dynamic clustering at the trigger tower level. To deal with spread energy deposits arising from 1-prong+pi0 or 3-prongs decays of the tau, a merging procedure of individual clusters is applied. The energy of the tau candidate results from a weighted sum of the ECAL and HCAL energies of the cluster, where the weights are energy and eta-dependent and have been determined as to match the visible energy of the tau. An integrated luminosity of 7.3fb-1 from 2012 Run D 8TeV data is used. The sample of hadronically decaying taus used in this plot is constituted applying a Z->tautau->mu-tau tag-and-probe selection, requiring a well-identified tag tau decaying into muon and a probe tau decaying hadronically, as well as opposite charges and finally a [42.5GeV,72.5GeV] mass window requirement. |
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Level-1 tau trigger efficiency as a function of the offline tau calorimetric energy for taus in the barrel, pseudorapidity region [-1.5,1.5], for a level-1 transverse energy threshold of 30 GeV. The performance of the stage-2 upgrade trigger (red) is compared with those of the Run 1 algorithm (black). The energy measurement of the latter has been rescaled to match that of the former. Stringent criteria on the isolation and on the energy deposit pattern are applied in the Run 1 algorithm. The stage-2 level-1 trigger upgrade tau reconstruction algorithm performs first a dynamic clustering at the trigger tower level. To deal with spread energy deposits arising from 1-prong+pi0 or 3-prongs decays of the tau, a merging procedure of individual clusters is applied. The energy of the tau candidate results from a weighted sum of the ECAL and HCAL energies of the cluster, where the weights are energy and eta-dependent and have been determined as to match the visible energy of the tau. An integrated luminosity of 7.3fb-1 from 2012 Run D 8TeV data is used. The sample of hadronically decaying taus used in this plot is constituted applying a Z->tautau->mu-tau tag-and-probe selection, requiring a well-identified tag tau decaying into muon and a probe tau decaying hadronically, as well as opposite charges and finally a [42.5GeV,72.5GeV] mass window requirement. |
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Level-1 tau trigger efficiency as a function of the offline tau calorimetric energy (ET) for taus in the endcaps, pseudorapidity region [1.5,2.3] v [-1.5,-2.3], for a level-1 transverse energy threshold of 30 GeV. The performance of the stage-2 upgrade trigger (red) is compared with those of the Run 1 algorithm (black). The energy measurement of the latter has been rescaled to match that of the former. Stringent criteria on the isolation and on the energy deposit pattern are applied in the Run 1 algorithm. The stage-2 level-1 trigger upgrade tau reconstruction algorithm performs first a dynamic clustering at the trigger tower level. To deal with spread energy deposits arising from 1-prong+pi0 or 3-prongs decays of the tau, a merging procedure of individual clusters is applied. The energy of the tau candidate results from a weighted sum of the ECAL and HCAL energies of the cluster, where the weights are energy and eta-dependent and have been determined as to match the visible energy of the tau. The sample of hadronically decaying taus used in this plot is constituted applying a Z->tautau->mu-tau tag-and-probe selection, requiring a well-identified tag tau decaying into muon and a probe tau decaying hadronically, as well as opposite charges and finally a [42.5GeV,72.5GeV] mass window requirement. |
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Level-1 tau trigger efficiency as a function of the offline tau calorimetric energy (ET) for taus in the barrel for different level-1 transverse energy thresholds: 20 GeV, 25 GeV, 30 GeV and 35 GeV. The stage-2 level-1 trigger upgrade tau reconstruction algorithm performs first a dynamic clustering at the trigger tower level. To deal with spread energy deposits arising from 1-prong+pi0 or 3-prongs decays of the tau, a merging procedure of individual clusters is applied. The energy of the tau candidate results from a weighted sum of the ECAL and HCAL energies of the cluster, where the weights are energy and eta-dependent and have been determined as to match the visible energy of the tau. The sample of hadronically decaying taus used in this plot is constituted applying a Z->tautau->mu-tau tag-and-probe selection, requiring a well-identified tag tau decaying into muon and a probe tau decaying hadronically, as well as opposite charges and finally a [42.5GeV,72.5GeV] mass window requirement. |
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Level-1 tau trigger efficiency as a function of the offline reconstructed tau transverse momentum (PT) for taus in the barrel for different level-1 transverse energy thresholds: 20 GeV, 25 GeV, 30 GeV and 35 GeV. The stage-2 level-1 trigger upgrade tau reconstruction algorithm performs first a dynamic clustering at the trigger tower level. To deal with spread energy deposits arising from 1-prong+pi0 or 3-prongs decays of the tau, a merging procedure of individual clusters is applied. The energy of the tau candidate results from a weighted sum of the ECAL and HCAL energies of the cluster, where the weights are energy and eta-dependent and have been determined as to match the visible energy of the tau. The sample of hadronically decaying taus used in this plot is constituted applying a Z->tautau->mu-tau tag-and-probe selection, requiring a well-identified tag tau decaying into muon and a probe tau decaying hadronically, as well as opposite charges and finally a [42.5GeV,72.5GeV] mass window requirement. |
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Level-1 tau trigger efficiency as a function of the offline tau calorimetric energy (ET) for taus in the endcaps for different level-1 transverse energy thresholds: 20 GeV, 25 GeV, 30 GeV and 35 GeV. The stage-2 level-1 trigger upgrade tau reconstruction algorithm performs first a dynamic clustering at the trigger tower level. To deal with spread energy deposits arising from 1-prong+pi0 or 3-prongs decays of the tau, a merging procedure of individual clusters is applied. The energy of the tau candidate results from a weighted sum of the ECAL and HCAL energies of the cluster, where the weights are energy and eta-dependent and have been determined as to match the visible energy of the tau. The sample of hadronically decaying taus used in this plot is constituted applying a Z->tautau->mu-tau tag-and-probe selection, requiring a well-identified tag tau decaying into muon and a probe tau decaying hadronically, as well as opposite charges and finally a [42.5GeV,72.5GeV] mass window requirement. |
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Level-1 tau trigger efficiency as a function of the offline reconstructed tau transverse momentum (PT) for taus in the endcaps for different level-1 transverse energy thresholds: 20 GeV, 25 GeV, 30 GeV and 35 GeV. The stage-2 level-1 trigger upgrade tau reconstruction algorithm performs first a dynamic clustering at the trigger tower level. To deal with spread energy deposits arising from 1-prong+pi0 or 3-prongs decays of the tau, a merging procedure of individual clusters is applied. The energy of the tau candidate results from a weighted sum of the ECAL and HCAL energies of the cluster, where the weights are energy and eta-dependent and have been determined as to match the visible energy of the tau. The sample of hadronically decaying taus used in this plot is constituted applying a Z->tautau->mu-tau tag-and-probe selection, requiring a well-identified tag tau decaying into muon and a probe tau decaying hadronically, as well as opposite charges and finally a [42.5GeV,72.5GeV] mass window requirement. |
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Level-1 tau trigger efficiency as a function of the offline tau calorimetric energy (ET) for taus in the [-2.3, 2.3] pseudorapity region (barrel+endcaps) for different level-1 transverse energy thresholds: 20 GeV, 25 GeV, 30 GeV and 35 GeV. The stage-2 level-1 trigger upgrade tau reconstruction algorithm performs first a dynamic clustering at the trigger tower level. To deal with spread energy deposits arising from 1-prong+pi0 or 3-prongs decays of the tau, a merging procedure of individual clusters is applied. The energy of the tau candidate results from a weighted sum of the ECAL and HCAL energies of the cluster, where the weights are energy and eta-dependent and have been determined as to match the visible energy of the tau. The sample of hadronically decaying taus used in this plot is constituted applying a Z->tautau->mu-tau tag-and-probe selection, requiring a well-identified tag tau decaying into muon and a probe tau decaying hadronically, as well as opposite charges and finally a [42.5GeV,72.5GeV] mass window requirement. |
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Level-1 tau trigger efficiency as a function of offline reconstructed tau transverse momentum (PT) for taus in the [-2.3, 2.3] pseudorapity region (barrel+endcaps) for different level-1 transverse energy thresholds: 20 GeV, 25 GeV, 30 GeV and 35 GeV. The stage-2 level-1 trigger upgrade tau reconstruction algorithm performs first a dynamic clustering at the trigger tower level. To deal with spread energy deposits arising from 1-prong+pi0 or 3-prongs decays of the tau, a merging procedure of individual clusters is applied. The energy of the tau candidate results from a weighted sum of the ECAL and HCAL energies of the cluster, where the weights are energy and eta-dependent and have been determined as to match the visible energy of the tau. The sample of hadronically decaying taus used in this plot is constituted applying a Z->tautau->mu-tau tag-and-probe selection, requiring a well-identified tag tau decaying into muon and a probe tau decaying hadronically, as well as opposite charges and finally a [42.5GeV,72.5GeV] mass window requirement. |
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Level-1 tau trigger energy response for taus in the barrel. The response of the stage-2 upgrade trigger (red) is compared with that of the Run 1 algorithm (blue). The energy measurement of the latter has been rescaled to match that of the former. The stage-2 level-1 trigger upgrade tau reconstruction algorithm performs a dynamic clustering at the trigger tower level. To deal with spread energy deposits arising from 1-prong+pi0 or 3-prongs decays of the tau, a merging procedure of individual clusters is applied. The energy of the tau candidate results from a weighted sum of the ECAL and HCAL energies of the cluster, where the weights are energy and eta-dependent and have been determined as to match the visible energy of the tau. The energy resolutions of the two alogrithms are similar even though the upgrade algorithm is collecting the energy in a much smaller region. The sample of hadronically decaying taus used in this plot is constituted applying a Z->tautau->mu-tau tag-and-probe selection, requiring a well-identified tag tau decaying into muon and a probe tau decaying hadronically, as well as opposite charges and finally a [42.5GeV,72.5GeV] mass window requirement. |
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Level-1 tau trigger energy resolution for taus in the endcaps. The resolutions of the stage-2 upgrade trigger (red) is compared with those of the Run 1 algorithm (blue). The energy measurement of the latter has been rescaled to match that of the former. The stage-2 level-1 trigger upgrade tau reconstruction algorithm performs a dynamic clustering at the trigger tower level. To deal with spread energy deposits arising from 1-prong+pi0 or 3-prongs decays of the tau, a merging procedure of individual clusters is applied. The energy of the tau candidate results from a weighted sum of the ECAL and HCAL energies of the cluster, where the weights are energy and eta-dependent and have been determined as to match the visible energy of the tau. The energy resolutions of the two alogrithms are similar even though the upgrade algorithm is collecting the energy in a much smaller region. The sample of hadronically decaying taus used in this plot is constituted applying a Z->tautau->mu-tau tag-and-probe selection, requiring a well-identified tag tau decaying into muon and a probe tau decaying hadronically, as well as opposite charges and finally a [42.5GeV,72.5GeV] mass window requirement. |
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Level-1 tau trigger energy resolution for taus in the [-2.3, 2.3] pseudorapity region (barrel+endcaps). The energy measurement of the latter has been rescaled to match that of the former. The stage-2 level-1 trigger upgrade tau reconstruction algorithm performs a dynamic clustering at the trigger tower level. To deal with spread energy deposits arising from 1-prong+pi0 or 3-prongs decays of the tau, a merging procedure of individual clusters is applied. The energy of the tau candidate results from a weighted sum of the ECAL and HCAL energies of the cluster, where the weights are energy and eta-dependent and have been determined as to match the visible energy of the tau. The energy resolutions of the two alogrithms are similar even though the upgrade algorithm is collecting the energy in a much smaller region. The sample of hadronically decaying taus used in this plot is constituted applying a Z->tautau->mu-tau tag-and-probe selection, requiring a well-identified tag tau decaying into muon and a probe tau decaying hadronically, as well as opposite charges and finally a [42.5GeV,72.5GeV] mass window requirement. |
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Level-1 tau trigger pseudorapidity resolution for taus in the barrel. The resolutions of the stage-2 upgrade trigger (red) is compared with those of the Run 1 algorithm (blue). The stage-2 level-1 trigger upgrade tau reconstruction algorithm performs a dynamic clustering at the trigger tower level, and the position is evaluated using the distribution of energy within the cluster. For those cluster that are the results of the merging between 2 "elementary" clusters, the position is the energy weighted average position of the two single clusters. The improvement in the position resolution with the upgrade system directly results from the access to the trigger tower granularity allowed by the new hardware. The sample of hadronically decaying taus used in this plot is constituted applying a Z->tautau->mu-tau tag-and-probe selection, requiring a well-identified tag tau decaying into muon and a probe tau decaying hadronically, as well as opposite charges and finally a [42.5GeV,72.5GeV] mass window requirement. |
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Level-1 tau trigger pseudorapidity resolution for taus in the endcaps. The resolutions of the stage-2 upgrade trigger (red) is compared with those of the Run 1 algorithm (blue). The stage-2 level-1 trigger upgrade tau reconstruction algorithm performs a dynamic clustering at the trigger tower level, and the position is evaluated using the distribution of energy within the cluster. For those cluster that are the results of the merging between 2 "elementary" clusters, the position is the energy weighted average position of the two single clusters. The improvement in the position resolution with the upgrade system directly results from the access to the trigger tower granularity allowed by the new hardware. The sample of hadronically decaying taus used in this plot is constituted applying a Z->tautau->mu-tau tag-and-probe selection, requiring a well-identified tag tau decaying into muon and a probe tau decaying hadronically, as well as opposite charges and finally a [42.5GeV,72.5GeV] mass window requirement. |
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Level-1 tau trigger pseudorapidity resolution for taus in the [-2.3, 2.3] pseudorapity region (barrel+endcaps). The resolutions of the stage-2 upgrade trigger (red) is compared with those of the Run 1 algorithm (blue). The stage-2 level-1 trigger upgrade tau reconstruction algorithm performs a dynamic clustering at the trigger tower level, and the position is evaluated using the distribution of energy within the cluster. For those cluster that are the results of the merging between 2 "elementary" clusters, the position is the energy weighted average position of the two single clusters.The improvement in the position resolution with the upgrade system directly results from the access to the trigger tower granularity allowed by the new hardware. The sample of hadronically decaying taus used in this plot is constituted applying a Z->tautau->mu-tau tag-and-probe selection, requiring a well-identified tag tau decaying into muon and a probe tau decaying hadronically, as well as opposite charges and finally a [42.5GeV,72.5GeV] mass window requirement. |
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Level-1 tau trigger phi resolution for taus in the barrel. The resolutions of the stage-2 upgrade trigger (red) is compared with those of the Run 1 algorithm (blue). The stage-2 level-1 trigger upgrade tau reconstruction algorithm performs a dynamic clustering at the trigger tower level, and the position is evaluated using the distribution of energy within the cluster. For those cluster that are the results of the merging between 2 "elementary" clusters, the position is the energy weighted average position of the two single clusters. The position for a current tau candidate is the centre of the RCT region where this object belong. 7.3fb-1 of 8TeV data from 2012 are used. Events used are those passing a Z->tautau->mu-tau tag-and-probe selection, with a well-identified tag tau decaying into muon and a probe tau decaying hadronically, as well as opposite charges and mass window [42.5GeV,72.5GeV] requirements. |
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Level-1 tau trigger phi resolution for taus in the endcaps. The resolutions of the stage-2 upgrade trigger (red) is compared with those of the Run 1 algorithm (blue). The stage-2 level-1 trigger upgrade tau reconstruction algorithm performs a dynamic clustering at the trigger tower level, and the position is evaluated using the distribution of energy within the cluster. For those cluster that are the results of the merging between 2 "elementary" clusters, the position is the energy weighted average position of the two single clusters. The improvement in the position resolution with the upgrade system directly results from the access to the trigger tower granularity allowed by the new hardware. The sample of hadronically decaying taus used in this plot is constituted applying a Z->tautau->mu-tau tag-and-probe selection, requiring a well-identified tag tau decaying into muon and a probe tau decaying hadronically, as well as opposite charges and finally a [42.5GeV,72.5GeV] mass window requirement. |
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Level-1 tau trigger phi resolution for taus in the [-2.3,2.3] pseudorapity region (barrel+endcaps). The resolutions of the stage-2 upgrade trigger (red) is compared with those of the Run 1 algorithm (blue). The stage-2 level-1 trigger upgrade tau reconstruction algorithm performs a dynamic clustering at the trigger tower level, and the position is evaluated using the distribution of energy within the cluster. For those cluster that are the results of the merging between 2 "elementary" clusters, the position is the energy weighted average position of the two single clusters. The improvement in the position resolution with the upgrade system directly results from the access to the trigger tower granularity allowed by the new hardware. The sample of hadronically decaying taus used in this plot is constituted applying a Z->tautau->mu-tau tag-and-probe selection, requiring a well-identified tag tau decaying into muon and a probe tau decaying hadronically, as well as opposite charges and finally a [42.5GeV,72.5GeV] mass window requirement. |
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Level-1 tau background rejection versus Level-1 tau signal efficiency evaluated for different values of the Level-1 transverse energy thresholds for taus in the [-2.3, 2.3] pseudorapity region (barrel+endcap). The stage-2 upgrade algorithm (dashed-blue) is compared to the Run 1 algorithm (red) and two particular working points are shown in the curves for both algorithm: Level-1 transverse energy above 20 GeV (black dot) and above 30 GeV (white circle). The sample of hadronically decaying taus used in this plot is constituted applying a Z->tautau->mu-tau tag-and-probe selection, requiring a well-identified tag tau decaying into muon and a probe tau decaying hadronically, as well as opposite charges and finally a [42.5GeV,72.5GeV] mass window requirement. For the background rejection evaluation, events triggered in a 8TeV Minimum-bias sample with Level-1 muon with pT>12 GeV from the Run D data taking period have been used. As visible in the turn-on plots above, the Run 1 algorithm efficiency saturates at 70% efficiency. |
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Level-1 transverse energy distribution in the isolation region (Iso ET) for stage-2 upgrade tau trigger for signal events (blue) and background (green). The isolation is computed summing the energy in a 5x9 region in the (i-eta; i-phi) plane after the subtraction of the energy assigned to the Level-1 stage-2 tau candidate. The sample of hadronically decaying taus used in this plot for the signal is constituted applying a Z->tautau->mu-tau tag-and-probe selection, requiring a well-identified tag tau decaying into muon and a probe tau decaying hadronically, as well as opposite charges and finally a [42.5GeV,72.5GeV] mass window requirement. For the distribution related to the background, events triggered in a 8TeV Minimum-bias sample with Level-1 muon with pT>12 GeV from 2012 data taking have been used. Both for the signal and background samples, a minimum L1 transverse energy of 20 GeV is required. The distributions for both signal and background are normalised to unity andand their different trends can be observed. |
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The isolation efficiency on the background is shown as a function of the signal isolation efficiency for different values of cuts over the transverse energy in the isolation region for Level-1 stage-2 upgrade tau candidate with a 20 GeV threshold on their transverse energy. The sample of hadronically decaying taus used in this plot for the signal is constituted applying a Z->tautau->mu-tau tag-and-probe selection, requiring a well-identified tag tau decaying into muon and a probe tau decaying hadronically, as well as opposite charges and finally a [42.5GeV,72.5GeV] mass window requirement. For the background efficiency, events triggered in a 8TeV Minimum-bias sample with Level-1 muon with pT>12 GeV from 2012 data taking have been used. The red marker show the working point for a cut on the transverse energy in the isolation region less than 1 GeV: for this working point the Run 1 algorithm and the upgrade stage-2 one present the same efficiency. |
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Level-1 tau background reduction for L1 Et thresholds above 20 GeV. Triggered events in a 8TeV Minimum-bias with Level-1 muon with pT>12 GeV sample from 2012 data taking have been used. The background reduction obtained with the stage-2 upgrade non-isolated trigger (black-dashed) are compared with those obtained with the Run 1 algorithm (red) and with the stage-2 upgrade isolated (blue). The isolation threshold used (<=1 GeV) is the one that allow an efficiency for the stage-2 upgrade algorithm comparable to the one of the Run 1 algorithm, and it is reported on the previous plot. From a series of turn-on curves as function of the offline pT made with various L1 thresholds, a correspondence between the L1 threshold and the offline pT yielding a 50% L1 trigger efficiency is obtained. The background reduction for various L1 ET thresholds above 20 GeV is represented on the vertical axis. The 50% efficiency offline pT for the chosen L1 ET threshold is shown on the x-axis. |
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