CMS Conference Reports

Ostatnio dodane:
2019-10-18
15:31
 Performance of the BRIL luminometers at CMS in Run 2 / Karacheban, Olena (CERN) /CMS Collaboration CMS features three luminosity subdetectors capable of providing real-time (?online?) luminosity on a bunch-by-bunch level independently of the main CMS data acquisition system: the Fast Beam Conditions Monitor (BCM1F), the Hadron Forward (HF) calorimeter, and the Pixel Luminosity Telescope (PLT). These luminometers have operated since the beginning of Run 2 (2015-2018) at the LHC. [...] CMS-CR-2019-140.- Geneva : CERN, 2019 - 6 p. Fulltext: PDF; In : European Physical Society Conference on High Energy Physics (EPS-HEP) 2019, Ghent, Belgium, 10 - 17 Jul 2019

2019-10-18
15:31
 Optimizing the performance of the CMS ECAL trigger for Runs 2 and 3 of the CERN LHC / Tishelman Charny, Abraham (Northeastern U.) /CMS Collaboration The CMS Electromagnetic Calorimeter (ECAL) is a high resolution crystal calorimeter operating at the CERN LHC. It is responsible for the identification and precise reconstruction of electrons and photons in CMS, which were crucial in the discovery and subsequent characterization of the Higgs boson. [...] CMS-CR-2019-155.- Geneva : CERN, 2019 - 12 p. Fulltext: PDF; In : 2019 Meeting of the Division of Particles & Fields of the American Physical Society, Boston, United States Of America, 29 Jul - 2 Aug 2019

2019-10-16
16:41
 Firmware oriented trigger algorithm for CMS Drift Tubes in HL-LHC / Goy Lopez, Silvia (Madrid, CIEMAT) A full replacement of the muon trigger system in the CMS (Compact Muon Solenoid) detector is envisaged for operating at the maximum instantaneous luminosities expected in HL-LHC (High Luminosity Large Hadron Collider) of about $5-7.5\times10^{34}$~cm$^{-2}$s$^{-1}$. Under this scenario, the new on detector electronics that is being designed for the DT (Drift Tubes) detector will forward all the chamber information at its maximum time resolution. [...] CMS-CR-2019-074.- Geneva : CERN, 2019 - 7 p. Fulltext: PDF; In : Connecting the Dots and Workshop on Intelligent Trackers (CTD/WIT 2019) , Valencia, Spain, 2 - 5 Apr 2019

2019-10-16
16:35
 Level-1 track finding with an all-FPGA system at CMS for the HL-LHC / James, Thomas Owen (CERN) /CMS Collaboration The Compact Muon Solenoid (CMS) experiment at the Large Hadron Collider (LHC) is designed to study a wide range of high energy physics phenomena. It employs a large all-silicon tracker within a 3.8\,T magnetic solenoid, which allows precise measurements of transverse momentum ($p_\mathrm{T}$) and vertex position. [...] CMS-CR-2019-083.- Geneva : CERN, 2019 - 10 p. Fulltext: PDF; In : Connecting the Dots and Workshop on Intelligent Trackers (CTD/WIT 2019) , Valencia, Spain, 2 - 5 Apr 2019

2019-10-16
16:34
 Emittance scans for CMS luminosity calibration in Run 2 / Karacheban, Olena (CERN) /CMS Collaboration The absolute luminosity calibration for LHC experiments is derived from dedicated beam separation scans, known as van der Meer (vdM) scans. However, vdM scans are performed with special beam optics, wide beams, and fewer, well-separated bunches to reduce potential systematic effects, and only once per year per collision mode. [...] CMS-CR-2019-141.- Geneva : CERN, 2019 - 6 p. Fulltext: PDF; In : European Physical Society Conference on High Energy Physics (EPS-HEP) 2019, Ghent, Belgium, 10 - 17 Jul 2019

2019-10-16
16:30
 $\bf{\Lambda_{c}^{+}}$ production in pp and PbPb collisions at 5.02~TeV with the CMS detector / Xiao, Rui (Purdue U.) /CMS Collaboration Due to their large masses, the interactions of heavy quarks with the quark-gluon plasma (QGP) may be different from those of light quarks. The lightest charm baryon is the $\Lambda_{c}^{+}$, composed of a charm quark and two light quarks. [...] CMS-CR-2019-152.- Geneva : CERN, 2019 - 5 p. Fulltext: PDF; In : 18th International Conference on Strangeness in Quark Matter, Bari, Italy, 10 - 15 Jun 2019

2019-10-15
10:02
 Status of searches in the long-lived particle and dark sectors, including full run-2 and HL-LHC prospects / Alimena, Juliette (Ohio State U.) /ATLAS, CMS and LHCB Collaborations Particles beyond the standard model can generically have lifetimes that are long compared to SM particles at the weak scale. When produced at the LHC at CERN, these long-lived particles (LLPs) can decay far from the primary proton-proton interaction, or even completely pass through the detector before decaying. [...] CMS-CR-2019-102.- Geneva : CERN, 2019 - 9 p. Fulltext: PDF; In : 31st Recontres de Blois (Particle Physics and Cosmology), Blois, France, 2 - 7 Jun 2019

2019-10-15
10:02
 Study of the effects of radiation on the CMS Drift Tubes Muon Detector for the HL-LHC / Gonzalez Caballero, Isidro (Oviedo U.) The CMS drift tubes (DT) muon detector, built for standing up the LHC expected integrated and instantaneous luminosities, will be used also in the High Luminosity LHC (HL-LHC) at a 5 times larger instantaneous luminosity and, consequently, much higher levels of radiation, reaching about 10 times the LHC integrated luminosity. Initial irradiation tests of a spare DT chamber at the CERN gamma irradiation facility (GIF++), at large (~O(100)) acceleration factor, showed ageing effects resulting in a degradation of the DT cell performance. [...] CMS-CR-2019-159.- Geneva : CERN, 2019 - 11 p. Fulltext: PDF; In : 21st International Workshop on Radiation Imaging Detectors, Kolympari, Chania, Greece, 7 - 12 Jul 2019

2019-09-26
16:18
 Searches for gluinos and squarks / Vami, Tamas Almos (Johns Hopkins U.) /ATLAS ,CMS and SUSY Collaborations Despite the great success of the Standard Model, it still does not explain Dark Matter, matter/antimatter asymmetry and it does not unite the electroweak and the strong forces. As a possible solution, the theory of Supersymmetry was proposed. [...] CMS-CR-2019-126.- Geneva : CERN, 2019 - 16 p. Fulltext: PDF; In : 7th Edition of the Large Hadron Collider Physics Conference, Puebla, Mexico, 20 May 2019

2019-09-24
11:39
 Open Data at CMS: Status and Plans / McCauley, Thomas (Notre Dame U.) /CMS Collaboration The CMS Experiment at the LHC has released many large datasets of proton-proton collision data as well as simulation to the public as part of its commitment to data preservation and open access. The collision data released totals around 2 fb$^{-1}$ at 7 TeV and nearly 12 fb$^{-1}$ at 8 TeV.Data preservation describes the efforts to not only preserve the data itself but the conditions in which it can be analyzed. [...] CMS-CR-2019-119.- Geneva : CERN, 2019 - 8 p. Fulltext: PDF; In : 7th Edition of the Large Hadron Collider Physics Conference, Puebla, Mexico, 20 May 2019