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2023-05-15
14:52
FlashSim prototype: an end-to-end fast simulation using Normalizing Flow / Vaselli, Francesco (INFN, Pisa ; Pisa, Scuola Normale Superiore) ; Rizzi, Andrea (INFN, Pisa ; Pisa U.) ; Cattafesta, Filippo (INFN, Pisa) ; Cicconofri, Gloria (INFN, Pisa) /CMS Collaboration
We present a prototype of Flash-sim, a fast simulation for CMS analysis level event content (NANOAOD) based on Machine Learning. The Normalizing Flow technique is used to directly simulate reconstructed physics object information from generator level objects, skipping the full simulation and reconstruction [...]
CMS-NOTE-2023-003; CERN-CMS-NOTE-2023-003.- Geneva : CERN, 2023 - 22 p. Fulltext: PDF;

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2023-05-02
11:39
Evaluation of HPK $n^+$-$p$ planar pixel sensors for the CMS Phase-2 upgrade / The Tracker Group of the CMS Collaboration /CMS Collaboration
To cope with the challenging environment of the planned high luminosity upgrade of the Large Hadron Collider (HL-LHC), scheduled to start operation in 2029, CMS will replace its entire tracking system. The requirements for the tracker are largely determined by the long operation time of 10~years with an instantaneous peak luminosity of up to $7.5\times 10^{34}$~cm$^{-2}$s$^{-1}$ in the ultimate performance scenario. Depending on the radial distance from the interaction point, the silicon sensors will receive a particle fluence corresponding to a non-ionizing energy loss of up to $\Phi_{\text{eq}} = 3.5\times 10^{16}$~cm$^{-2}$. [...]
CMS-NOTE-2023-002; CERN-CMS-NOTE-2023-002.- Geneva : CERN, 2021 - 22 p. Fulltext: PDF;

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2023-03-06
12:01
Test beam performance of a CBC3-based mini-module for the Phase-2 CMS Outer Tracker before and after neutron irradiation / The Tracker Group of the CMS Collaboration /CMS Collaboration
The Large Hadron Collider (LHC) at CERN will undergo major upgrades to increase the instantaneous luminosity up to 5--7.5$\times10^{34}$\,cm$^{-2}$s$^{-1}$. This High Luminosity upgrade of the LHC (HL-LHC) will deliver a total of 3000--4000\,fb$^{-1}$ of proton-proton collisions at a center-of-mass energy of 13--14\,TeV. [...]
CMS-NOTE-2023-001; CERN-CMS-NOTE-2023-001.- Geneva : CERN, 2021 - 35 p. Fulltext: PDF;

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2022-09-12
14:10
Methods for off-shell Higgs boson production simulation used in CMS analyses / CMS Collaboration /CMS Collaboration
Studies of simulation methods for off-shell Higgs (H) boson production are presented. Reweighting techniques are applied to samples generated at next-to-leading order (NLO) in QCD with multiple H boson pole masses in order to approach NLO accuracy for the modeling of off-shell spectra. [...]
CMS-NOTE-2022-010; CERN-CMS-NOTE-2022-010.- Geneva : CERN, 2022 - 38 p. Fulltext: PDF;

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2022-09-05
13:29
A Firmware-oriented Analytical Algorithm for Trigger Primitive Generation in the CMS Drift Tubes Detector for the High Luminosity LHC / The CMS Muon Drift Tubes Group
The Compact Muon Solenoid (CMS) experiment prepares its Phase-2 upgrade for the high-luminosity era of the LHC operation (HL-LHC). Due to the increase of occupancy, trigger latency and rates, the full electronics of the CMS Drift Tube (DT) chambers will need to be replaced. [...]
CMS-NOTE-2022-009; CERN-CMS-NOTE-2022-009.- Geneva : CERN, 2022 - 9 p. Fulltext: PDF;

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2022-07-08
16:54
CMS Phase-2 Computing Model: Update Document / CMS Offline Software ; Computing
The Phase-2 upgrade of CMS, coupled with the projected performance of the HL-LHC, shows great promise in terms of discovery potential. However, the increased granularity of the CMS detector and the higher complexity of the collision events generated by the accelerator pose challenges in the areas of data acquisition, processing, simulation, and analysis [...]
CMS-NOTE-2022-008; CERN-CMS-NOTE-2022-008.- Geneva : CERN, 2022 - 45 p. Fulltext: PDF;

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2022-06-20
12:53
The Pixel Luminosity Telescope: A detector for luminosity measurement at CMS using silicon pixel sensors / The CMS BRIL Collaboration
The Pixel Luminosity Telescope (PLT) is a silicon pixel detector dedicated to luminosity measurement at the CMS experiment at the LHC. It is located approximately 1.75 m from the interaction point and arranged into 16 ``telescopes'', with eight telescopes installed around the beam pipe at either end of the detector and each telescope composed of three individual silicon sensor planes. [...]
CMS-NOTE-2022-007; CERN-CMS-NOTE-2022-007.- Geneva : CERN, 2022 - 49 p. Fulltext: PDF;

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2022-06-07
13:36
Comparative characterization study of LYSO:Ce crystals for timing applications / Addesa, Francesca Maria (Princeton U.) ; Barria, Patrizia (INFN, Rome) ; Bianco, Roberta (INFN, Rome) ; Campana, Mattia (INFN, Rome ; Rome U.) ; Cavallari, Francesca (INFN, Rome) ; Cemmi, A ; Cipriani, Marco (CERN) ; Dafinei, Ioan (INFN, Rome) ; Del Re, Daniele (INFN, Rome ; Rome U.) ; Diemoz, Marcella (INFN, Rome) et al.
Cerium-doped Lutetium-Yttrium Oxyorthosilicate (LYSO:Ce) is one of the most widely used Cerium-doped Lutetium based scintillation crystals. Initially developed for medical detectors it rapidly became attractive for High Energy Particle Physics (HEP) applications, especially in the frame of high luminosity particle colliders. [...]
CMS-NOTE-2022-006; CERN-CMS-NOTE-2022-006.- Geneva : CERN, 2022 - 39 p. Fulltext: PDF;

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2022-05-02
13:37
Implementation of CMSWEB Services Deployment Procedures using HELM / Pervaiz, Aroosha (CERN) ; Imran, Muhammad (Quaid-i-Azam U.) ; Kuznetsov, Valentin (Cornell U.) ; Paparrigopoulos, Panos (CERN) ; Trigazis, Spyridon (CERN) ; Pfeiffer, Andreas (CERN) /CMS Collaboration
The Compact Muon Solenoid (CMS) experiment heavily relies on the CMSWEB cluster to host critical services for its operational needs. Recently, CMSWEB cluster has been migrated from the VM cluster to the Kubernetes (k8s) cluster. [...]
CMS-NOTE-2022-005; CERN-CMS-NOTE-2022-005.- Geneva : CERN, 2022 - 9 p. Fulltext: PDF;

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2022-04-07
12:44
Quality Control of Mass-Produced GEM Detectors for the CMS GE1/1 Muon Upgrade / Abbas, Syed Mohsin (IPM, Tehran) ; Abbrescia, Marcello (INFN, Bari ; Bari U.) ; Abdalla, Hassan Fathy (Cairo, Acad. Sci. Res. Tech.) ; Abdelalim, Ahmed Ali (Cairo, Acad. Sci. Res. Tech.) ; Abuzeid Hassan, Shimaa Abdelwahed (INFN, Pavia) ; Agapitos, Antonis (Peking U.) ; Ahmad, Ashfaq (Quaid-i-Azam U.) ; Ahmed, Asar (Delhi U.) ; Ahmed, Waqar (Quaid-i-Azam U.) ; Aimè, Chiara (INFN, Pavia ; Pavia U.) et al.
The series of upgrades to the Large Hadron Collider, culminating in the High Luminosity Large Hadron Collider, will enable a significant expansion of the physics program of the CMS experiment. However, the accelerator upgrades will also make the experimental conditions more challenging, with implications for detector operations, triggering, and data analysis. [...]
CMS-NOTE-2022-004; CERN-CMS-NOTE-2022-004.- Geneva : CERN, 2022 - 47 p. Fulltext: PDF;

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