CERN Accelerating science

CMS Notes

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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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2022-03-19
10:26
A Study of the Single Higgs Modelling for Constraining Higgs Boson Trilinear Self-coupling in STXS (1.2) Measurements / CMS Collaboration /CMS Collaboration
This document provides a parametrization of the cross sections of the main Higgs boson (H) production modes as a function of the H trilinear self-coupling, $\lambda$, with the phase-space granularity defined by the simplified template cross section (STXS) framework at stage 1.2. The trilinear self-coupling of the Higgs boson is an important parameter in the standard model, which is weakly constrained by current measurements. [...]
CMS-NOTE-2022-003; CERN-CMS-NOTE-2022-003.- Geneva : CERN, 2022 - 11 p. Fulltext: PDF;

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2022-02-28
16:14
CMS Full Simulation for Run-3 / Ivantchenko, Vladimir (Tomsk State U.) ; Banerjee, Sunanda (Wisconsin U., Madison) ; Hugo, Gabrielle (CERN) ; Lo Meo, Sergio (INFN, Bologna) ; Osborne, Ianna (Princeton U.) ; Pedro, Kevin Jerome (Fermilab) ; Piparo, Danilo (CERN) ; Sorokin, Dmitry (Moscow, MIPT) ; Srimanobhas, Norraphat (Chulalongkorn U.) ; Vuosalo, Carl Onni Urho (Wisconsin U., Madison)
We report the status of the CMS full simulation for Run 3. During the long shutdown of the LHC a significant update has been introduced to the CMS code for simulation. [...]
CMS-NOTE-2022-002; CERN-CMS-NOTE-2022-002.- Geneva : CERN, 2021 - 7 p. Fulltext: PDF;

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2022-02-15
17:05
Beam test performance of a prototype module with Short Strip ASICs for the CMS HL-LHC tracker upgrade / The Tracker Group of the CMS Collaboration /CMS Collaboration
The Short Strip ASIC (SSA) is one of the four front-end chips designed for the upgrade of the CMS Outer Tracker for the High Luminosity LHC. Together with the Macro-Pixel ASIC (MPA) it will instrument modules containing a strip and a macro-pixel sensor stacked on top of each other. The SSA provides both full readout of the strip hit information when triggered, and, together with the MPA, correlated clusters called stubs from the two sensors for use by the CMS Level-1 (L1) trigger system. Results from the first prototype module consisting of a sensor and two SSA chips are presented. [...]
CMS-NOTE-2022-001; CERN-CMS-NOTE-2022-001.- Geneva : CERN, 2021 - 23 p. Fulltext: PDF;

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2021-12-17
12:01
A semi-empirical model for preheater design to trigger CO$_2$ boiling for detector cooling / Baldinelli, Giorgio (INFN, Perugia) ; French, Thomas Anders (CERN) ; Bianchi, Francesco (INFN, Perugia) ; Daguin, Jerome (CERN) ; Onnela, Antti Tero Olavi (CERN) ; Tropea, Paola (CERN)
The fluid properties of CO$_2$ make it an ideal medium for the cooling of tracking detectors in experiments at particle accelerators. Detectors such as the Compact Muon Solenoid Outer Tracker at CERN will be cooled to a nominal temperature of -35$^{\circ}$C with CO$_2$ cooling to ensure the longevity of the silicon sensors. [...]
CMS-NOTE-2020-004; CERN-CMS-NOTE-2020-004.- Geneva : CERN, 2020 - 21 p. Fulltext: PDF;

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2021-12-17
11:45
Detailed results of the response of a CMS HGCAL silicon-pad electromagnetic calorimeter prototype to 20-300 GeV positrons. / Akchurin, Nural (Texas Tech.)
CMS is designing a new high-granularity endcap calorimeter, HGCAL, to be installed later this decade. As part of this development work, a prototype system was extensively tested with beams at CERN's SPS in 2018. [...]
CMS-NOTE-2021-009; CERN-CMS-NOTE-2021-009.- Geneva : CERN, 2021 - 37 p. Fulltext: PDF;

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2021-12-17
11:45
Influence of Surface Damage and Bulk Defects on the Interstrip Isolation of p-type Silicon Strip Sensors / Gosewisch, Jan-Ole (KIT, Karlsruhe, EKP) ; Dierlamm, Alexander Hermann (KIT, Karlsruhe, EKP) ; Nurnberg, Andreas Matthias (DESY)
Silicon strip sensors of upcoming tracking detectors in high luminosity colliders usually consist of a p-doped bulk with n-type strip implants. The general consensus is that such a design requires an additional interstrip isolation structure such as a p-stop implant. If there is no additional implant between the strips, it is expected that the strip isolation will be insufficient. [...]
CMS-NOTE-2021-002; CERN-CMS-NOTE-2021-002.- Geneva : CERN, 2020 - 20 p. Fulltext: PDF;

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2021-12-17
11:45
Report from Young Scientist Fora at LHC / Vami, Tamas Almos (Johns Hopkins U.) ; ATLAS ; CMS ; LHCb young scientists
Half of each collaboration at LHC is composed of early career scientists (BSc, MSc, PhD students and PostDocs). To represent this demographic, young scientist committees were created at all LHC experiments. [...]
CMS-NOTE-2020-006; CERN-CMS-NOTE-2020-006.- Geneva : CERN, 2020 - 9 p. Fulltext: PDF;

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2021-12-17
11:39
Experimental Study of Different Silicon Sensor Options for the Upgrade of the CMS Outer Tracker / Tracker Group of the CMS Collaboration /CMS Collaboration
During the high-luminosity phase of the LHC (HL-LHC), planned to start around 2026, the accelerator is expected to deliver an instantaneous peak luminosity of up to $7.5\times10^{34}$~cm$^{-2}$s$^{-1}$. A total of $3000$~fb$^{-1}$ of integrated luminosity is foreseen to be delivered to the general purpose detectors ATLAS and CMS over a decade, thereby increasing the discovery potential of the LHC experiments significantly. The CMS detector will undergo a major upgrade for the HL-LHC, with entirely new tracking detectors consisting of an Outer Tracker and Inner Tracker. [...]
CMS-NOTE-2019-007; CERN-CMS-NOTE-2019-007.- Geneva : CERN, 2019 - 35 p. Fulltext: PDF;

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