CERN Accelerating science

CMS Detector Performance Summaries

Ostatnio dodane:
2020-11-07
09:50
Track impact parameter resolution for the full pseudo rapidity coverage in the 2017 dataset with the CMS Phase-1 Pixel detector /CMS Collaboration
This note summarizes preliminary results on the measurement of the transverse impact parameter resolution of tracks using legacy data collected in proton-proton collisions in 2017 with the Phase-1 Pixel detector. The measurement is performed in unbiased collision events with respect to the beam-spot position. [...]
CMS-DP-2020-049; CERN-CMS-DP-2020-049.- Geneva : CERN, 2020 - 13 p. Fulltext: PDF;

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2020-11-07
09:50
Performance of CMS Track- Based Muon Alignment in Run2 /CMS Collaboration
The alignment of the CMS muon detector is critical to maintaining accurate position determination of muon hits, thereby affecting momentum resolution and the sensitivity of physics analyses involving muons in the final state. Muon track data from both the muon system and the inner tracker is used to perform a multidimensional fit on the misalignment degrees of freedom. [...]
CMS-DP-2020-048; CERN-CMS-DP-2020-048.- Geneva : CERN, 2020 - 13 p. Fulltext: PDF;

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2020-11-07
09:50
Proton reconstruction with the Precision Proton Spectrometer (PPS) in Run 2
The Precision Proton Spectrometer (PPS) has collected more than 110 fb$^{-1}$ of data over the course of the LHC Run 2. This note illustrates the key features of PPS alignment and optics calibrations developed during this period, the reconstructed proton distributions and performance of the PPS simulation. [...]
CMS-DP-2020-047; CERN-CMS-DP-2020-047.- Geneva : CERN, 2020 - 27 p. Fulltext: PDF;

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2020-10-21
15:07
Efficiency of the Si-strips sensors used in the Precision Proton Spectrometer: radiation damage /CMS Collaboration
The Precision Proton Spectrometer (PPS) is a forward-proton spectrometer using near-beam detectors (inside Roman Pots, RPs) located symmetrically on both sides of IP5 at a distance of about 220 m. In the early stage of the project, the tracking RPs were equipped with the Si-strip sensors used in the TOTEM experiment. [...]
CMS-DP-2019-035; CERN-CMS-DP-2019-035.- Geneva : CERN, 2019 - 9 p. Fulltext: PDF;

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2020-10-06
19:39
Precision Proton Spectrometer timing detector efficiencies and two-arm timing resolution in 2018 data /CMS Collaboration
The Precision Proton Spectrometer (PPS) is a forward-proton spectrometer using near-beam detectors (inside Roman Pots, RPs) located symmetrically on both sides of IP5 at a distance of about 220 m. In addition to the tracking system, timing detectors were installed in 2017 to measure the Time-Of-Flight (TOF) of the protons produced in central exclusive interactions. [...]
CMS-DP-2020-046; CERN-CMS-DP-2020-046.- Geneva : CERN, 2020 - 15 p. Fulltext: PDF;

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2020-10-06
19:39
Simulation of the Silicon Strip Tracker pre-amplifier in early 2016 data /CMS Collaboration
Distributions of charge and multiplicities of clusters in the Silicon Strip Tracker in early 2016 data..
CMS-DP-2020-045; CERN-CMS-DP-2020-045.- Geneva : CERN, 2020 - 11 p. Fulltext: PDF;

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2020-10-06
19:39
Effect of the automated pixel detector bad component determination in tracking /CMS Collaboration
In CMS, several reconstructions of the data are performed in order to ensure the best quality of reconstructed data. The latest reprocessing campaign, called Legacy Reprocessing, was undertaken during the Long Shutdown 2. [...]
CMS-DP-2020-044; CERN-CMS-DP-2020-044.- Geneva : CERN, 2020 - 17 p. Fulltext: PDF;

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2020-09-21
17:37
Comparison of ATLAS and CMS VBS Monte Carlo simulation /CMS Collaboration
This is a collection of comparison plots, giving an overview over the different samples and settings employed at the atlas and cms experiments to model VBS processes. This document contains a set of plots showing preliminary results of the comparison..
CMS-DP-2020-043; CERN-CMS-DP-2020-043.- Geneva : CERN, 2020 - 14 p. Fulltext: PDF;

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2020-09-02
18:09
A novel reconstruction framework for an imaging calorimeter for HL-LHC /CMS Collaboration
To sustain the harsher conditions at high luminosity LHC (HL-LHC), the CMS experiment has designed a high granularity calorimeter (HGCAL) for the endcap regions, that uses silicon sensors to achieve radiation tolerance, with the additional benefit of a very high readout granularity. In regions characterised with lower radiation levels, scintillator tiles with individual SiPM readout are employed. [...]
CMS-DP-2020-027; CERN-CMS-DP-2020-027.- Geneva : CERN, 2020 - 13 p. Fulltext: PDF;

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2020-08-05
23:08
Identification of hadronic tau decay channels using multivariate analysis (MVA decay mode) /CMS Collaboration
A multivariate analysis is trained and developed to identify the hadronic decay channels of the tau lepton. The analysis exploits the features of the hadronic tau decay products, such as kinematic quantities and angular variables. [...]
CMS-DP-2020-041; CERN-CMS-DP-2020-041.- Geneva : CERN, 2020 - 12 p. Fulltext: PDF;

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