# CERN Accelerating science

CMS Documentation in CDS
Conference Reports, Notes, Preprints, Thesis and Photos can be searched from the general CMS Collection page.

# CMS Conference Reports

2018-12-07
16:07
 Operational experience with the new CMS DAQ expert / Sakulin, Hannes (CERN) /CMS Collaboration The data acquisition (DAQ) system of the Compact Muon Solenoid (CMS) at CERN reads out the detector at the level-1 trigger accept rate of 100 kHz, assembles events with a bandwidth of 200 GB/s, provides these events to the high level-trigger running on a farm of about 30k cores and records the accepted events. Comprising custom-built and cutting edge commercial hardware and several 1000 instances of software applications, the DAQ system is complex in itself and failures cannot be completely excluded. [...] CMS-CR-2018-406.- Geneva : CERN, 2018 - 9 p. Fulltext: PDF; In : 23rd International Conference on Computing in High Energy and Nuclear Physics, CHEP 2018, Sofia, Bulgaria, 9 - 13 Jul 2018

2018-12-07
16:07
 Experience with dynamic resource provisioning of the CMS online cluster using a cloud overlay / Da Silva Gomes, Diego (CERN) /CMS Collaboration The primary goal of the online cluster of the Compact Muon Solenoid (CMS) experiment at the Large Hadron Collider (LHC) is to build event data from the detector and to select interesting collisions in the High Level Trigger (HLT) farm for offline storage. With more than 1500 nodes and a capacity of about 850 kHEPSpec06, the HLT machines represent similar computing capacity of all the CMS Tier1 Grid sites together. [...] CMS-CR-2018-398.- Geneva : CERN, 2018 - 9 p. Fulltext: PDF; In : 23rd International Conference on Computing in High Energy and Nuclear Physics, CHEP 2018, Sofia, Bulgaria, 9 - 13 Jul 2018

2018-12-07
16:07
 Exploring End-to-end Deep Learning Applications for Event Classification at CMS / Andrews, Michael Benjamin (Carnegie Mellon U.) ; Paulini, Manfred (Carnegie Mellon U.) ; Gleyzer, Sergei (Florida U.) ; Barnabas Poczos /CMS Collaboration An essential part of new physics searches at the Large Hadron Collider (LHC) at CERN involves event classification, or distinguishing potential signal events from those coming from background processes. Current machine learning techniques accomplish this using traditional hand-engineered features like particle 4-momenta, motivated by our understanding of particle decay phenomenology. [...] CMS-CR-2018-379.- Geneva : CERN, 2018 - 9 p. Fulltext: PDF; In : 23rd International Conference on Computing in High Energy and Nuclear Physics, CHEP 2018, Sofia, Bulgaria, 9 - 13 Jul 2018

2018-12-07
16:07
 Using Big Data Technologies for HEP analysis / Cremonesi, Matteo (Fermilab) /CMS Collaboration The HEP community is approaching an era were the excellent performances of the particle accelerators in delivering collision at high rate will force the experiments to record a large amount of information. The growing size of the datasets could potentially become a limiting factor in the capability to produce scientific results timely and efficiently.Recently, new technologies and new approaches have been developed in industry to answer to the necessity to retrieve information as quick as possible by analyzing PB and EB datasets. [...] CMS-CR-2018-318.- Geneva : CERN, 2018 - 10 p. Fulltext: PDF; In : 23rd International Conference on Computing in High Energy and Nuclear Physics, CHEP 2018, Sofia, Bulgaria, 9 - 13 Jul 2018

2018-12-07
16:07
 Improving Scheduling Efficiency of a Global Multi-core HTCondor Pool in CMS / Letts, James (UC, San Diego) /CMS Collaboration Scheduling multi-core workflows in a global HTCondor pool is a multi-dimensional problem whose solution depends on the requirements of the job payloads, the characteristics of available resources, and the boundary conditions such as fair share and prioritization imposed on the job matching to resources. Within the context of a dedicated task force, CMS has increased significantly the scheduling efficiency of workflows in reusable multi-core pilots by various improvements to the limitations of the glideinWMS pilots, accuracy of resource requests, efficiency and speed of the HTCondor infrastructure, and job matching algorithms.. CMS-CR-2018-303.- Geneva : CERN, 2018 - 9 p. Fulltext: PDF; In : 23rd International Conference on Computing in High Energy and Nuclear Physics, CHEP 2018, Sofia, Bulgaria, 9 - 13 Jul 2018

2018-12-07
16:07
 CMS ECAL DAQ Monitoring system / Cucciati, Giacomo (CERN) /CMS Collaboration The Large Hadron Collider (LHC) at CERN Geneva has entered the Run 2 era, colliding protons at a center of mass energy of 13 TeV at high instantaneous luminosity. The Compact Muon Solenoid (CMS) is a general-purpose particle detector experiment at the LHC. [...] CMS-CR-2018-302.- Geneva : CERN, 2018 - 11 p. Fulltext: PDF; In : 23rd International Conference on Computing in High Energy and Nuclear Physics, CHEP 2018, Sofia, Bulgaria, 9 - 13 Jul 2018

2018-12-05
17:01
 Status report on the architecture and future upgrades of the CMS Electromagnetic Calorimeter Control and Safety Systems / Da Silva Di Calafiori, Diogo Raphael (Zurich, ETH) /CMS Collaboration The Electromagnetic Calorimeter (ECAL) is one of the sub-detectors of the Compact Muon Solenoid (CMS) experiment of the Large Hadron Collider (LHC) at CERN. For more than ten years, the ECAL Detector Control System (DCS) and the ECAL Safety System (ESS) have supported the experiment operation, contributing to its high availability and safety. [...] CMS-CR-2018-316.- Geneva : CERN, 2018 - 9 p. Fulltext: PDF; In : 23rd International Conference on Computing in High Energy and Nuclear Physics, CHEP 2018, Sofia, Bulgaria, 9 - 13 Jul 2018

2018-12-05
17:00
 Exploiting private and commercial clouds to generate on-demand CMS computing facilities with DODAS / Spiga, Daniele (INFN, Perugia) /CMS Collaboration Minimising time and cost is key to exploit private or commercial clouds. This can be achieved by increasing setup and operational efficiencies. [...] CMS-CR-2018-314.- Geneva : CERN, 2018 - 9 p. Fulltext: PDF; In : 23rd International Conference on Computing in High Energy and Nuclear Physics, CHEP 2018, Sofia, Bulgaria, 9 - 13 Jul 2018

2018-12-05
15:56
 Recent CMS results on soft and small-x QCD physics / Gupta, Rajat (Panjab U.) /CMS Collaboration We present latest results of soft and small-x QCD measurements with the CMS experiment, such as minimum bias/underlying event physics, and studies on forward jet production.. CMS-CR-2018-395.- Geneva : CERN, 2018 - 11 p. Fulltext: PDF; In : 48th International Symposium on Multiparticle Dynamics, Singapore, 3 - 7 Sep 2018

2018-12-05
09:40
 Beyond standard model searches on diboson resonances, vector-like quarks, and heavy bosons with top in the final state / Pazzini, Jacopo (INFN, Padua ; Padua U.) /ATLAS and CMS Collaborations The most recent results in the searches for physics beyond the standard model at the ATLAS and CMS experiments are presented, based on the data collected in proton-proton collisions at the CERN LHC at the center-of-mass energy of $\sqrt{s}=13$~TeV, with emphasis on the production of vector-like quarks and the production of heavy new resonance decaying to third generation SM quarks or gauge bosons.The decay of these new heavy states will present the striking feature of generating highly collimated decay products, as the results of a large Lorentz boost.For this reasons, the reconstruction and identification of hadronic decays are critical to most searches and are described in detail in this contribution.. CMS-CR-2018-367.- Geneva : CERN, 2018 - 9 p. Fulltext: PDF; In : 25th Rencontres du Vietnam, Quy Nhon, Vietnam, 5 - 11 Aug 2018