# CERN Accelerating science

The Preprints collection aims to cover as far as possible all the grey literature in particle physics and its related technologies. The collection contains something like 400,000 documents, out of which about 50% can be accessed electronically. The documents originate from a variety of institutes all over the world. The collection, currently available, starts in 1979 and it has a full coverage of the arXiv.org e-Print archive since its beginning in 1991.

# Preprints

2017-02-28
07:18
 Measurement of charged jet cross sections and jet shapes in proton-proton collisions at sqrt(s) = 2.76 TeV with the ALICE detector at LHC / Biswas, Rathijit We present measurements of charged jet cross sections and jet shape observables in leading jet in proton-proton (pp) collisions at sqrt(s) = 2.76 TeV with the ALICE detector at LHC. [...] arXiv:1702.07646. - Full text

2017-02-28
07:18
 Large hadronic power corrections or new physics in the rare decay B-->K* mu+ mu- ? / Chobanova, V.G. (Santiago de Compostela U., IGFAE) ; Hurth, T. (U. Mainz, PRISMA) ; Mahmoudi, F. (Lyon, Ecole Normale Superieure ; CERN) ; Martinez Santos, D. (Santiago de Compostela U., IGFAE) ; Neshatpour, S. (IPM, Tehran) The well-known problem of the unknown power corrections within QCD improved factorisation leaves the interpretation of the so-called LHCb anomalies in the angular observables of B-->K* mu+ mu- as an open problem. [...] CERN-TH-2017-031 ; IPM-PA-455 ; MITP-17-007 ; arXiv:1702.02234. - 17 p. Full text

2017-02-28
07:18
 Inflation and Conformal Invariance: The Perspective from Radial Quantization / Kehagias, Alex (CERN ; Natl. Tech. U., Athens) ; Riotto, Antonio (Geneva U., CAP ; Geneva U.) According to the dS/CFT correspondence, correlators of fields generated during a primordial de Sitter phase are constrained by three-dimensional conformal invariance. [...] arXiv:1701.05462. - 41 p. Full text

2017-02-27
13:40
 Flexible trigger menu implementation on the Global Trigger for the CMS Level-1 trigger upgrade / Matsushita, Takashi (Imperial Coll., London) /CMS Collaboration The CMS experiment at the Large Hadron Collider (LHC) has continued to explore physics at the high-energy frontier in 2016. The integrated luminosity delivered by the LHC in 2016 was 41~fb$^{-1}$ with a peak luminosity of 1.5 $\times$ 10$^{34}$ cm$^{-2}$s$^{-1}$ and peak mean pile-up of about 50, all exceeding the initial estimations for 2016. [...] CMS-CR-2017-013.- Geneva : CERN, 2017 - 8 p. Fulltext: PDF; In : 22nd International Conference on Computing in High Energy and Nuclear Physics, CHEP 2016, San Francisco, Usa, 10 - 14 Oct 2016

2017-02-27
13:39
 Fast emulation of track reconstruction in the CMS simulation / Komm, Matthias (Louvain U.) /CMS Collaboration Simulated samples of various physics processes are a key ingredient within analyses to unlock the physics behind LHC collision data. Samples with more and more statistics are required to keep up with the increasing amounts of recorded data. [...] CMS-CR-2017-018.- Geneva : CERN, 2017 - 6 p. Fulltext: PDF; In : 22nd International Conference on Computing in High Energy and Nuclear Physics, CHEP 2016, San Francisco, Usa, 10 - 14 Oct 2016

2017-02-27
13:39
 The CMS Data Acquisition - Architectures for the Phase-2 Upgrade / Andre, Jean-marc Olivier (Fermilab) ; Behrens, Ulf (DESY) ; Branson, James (UC, San Diego) ; Brummer, Philipp Maximilian (CERN) ; Chaze, Olivier (CERN) ; Cittolin, Sergio (UC, San Diego) ; Contescu, Cristian (Fermilab) ; Craigs, Benjamin Gordon (CERN) ; Darlea, Georgiana Lavinia (MIT) ; Deldicque, Christian (CERN) et al. The upgraded High Luminosity LHC, after the third Long Shutdown (LS3), will provide an instantaneous luminosity of $7.5\times10^{34}$ cm$^{-2} s^{-1}$ (levelled), at the price of extreme pileup of up to 200 interactions per crossing. In LS3, the CMS Detector will also undergo a major upgrade to prepare for the phase-2 of the LHC physics program, starting around 2025. The upgraded detector will be read out at an unprecedented data rate of up to 50 Tb/s and an event rate of 750 kHz. [...] CMS-CR-2017-030.- Geneva : CERN, 2017 - 9 p. Fulltext: PDF; In : 22nd International Conference on Computing in High Energy and Nuclear Physics, CHEP 2016, San Francisco, Usa, 10 - 14 Oct 2016

2017-02-27
13:39
 New operator assistance features in the CMS Run Control System / Andre, Jean-marc Olivier (Fermilab) ; Behrens, Ulf (DESY) ; Branson, James (UC, San Diego) ; Brummer, Philipp Maximilian (CERN) ; Chaze, Olivier (CERN) ; Cittolin, Sergio (UC, San Diego) ; Contescu, Cristian (Fermilab) ; Craigs, Benjamin Gordon (CERN) ; Darlea, Georgiana Lavinia (MIT) ; Deldicque, Christian (CERN) et al. The Run Control System of the Compact Muon Solenoid (CMS) experiment at CERN is a distributed Java web application running on Apache Tomcat servers. During Run-1 of the LHC, many operational procedures have been automated. [...] CMS-CR-2017-039.- Geneva : CERN, 2017 - 9 p. Fulltext: PDF; In : 22nd International Conference on Computing in High Energy and Nuclear Physics, CHEP 2016, San Francisco, Usa, 10 - 14 Oct 2016

2017-02-27
13:39
 Monitoring of the data processing and simulated production at CMS with a web-based service the Production Monitoring Platform (pMp) / Norkus, Antanas (Vilnius U.) /CMS Collaboration Physics analysis at the Compact Muon Solenoid (CMS)requires botha vast production of simulated eventsand an extensive processing of the data collected by the experiment.Since the end of the LHC runI in 2012, CMS has produced over 20 Billion simulated events,from 75 thousand processing requestsorganised in one hundred different campaigns,which emulate different configurations of collision events, CMS detector and LHC running conditions.In the same time span, sixteen data processing campaigns have taken place toreconstruct different portions of the runI and runII data with ever improving algorithms and calibrations.The scale and complexity of the events simulation and processingand the requirement that multiple campaigns must proceed in parallel,demand that a comprehensive, frequently updated and easily accessible monitoringbe made available to the CMS collaboration.Such monitoring must serve both the analysts,who want to know which and when datasets will become available,and the central teams in charge of submitting, prioritizing and running the requestsacross the distributed computing infrastructure of CMS.The Production Monitoring Platform (pMp) web-based service, has been developedin 2015 to address those needs. It aggregates information from multiple servicesused to define, organize and run the processing requests; pMp updates hourlya dedicated Elastic database, and provides multiple configurable viewsto assess the status of single datasets as well as entire production campaigns.This contribution will coverthe pMp development,the evolution of its functionalitiesand one and half year of operational experience.. CMS-CR-2017-040.- Geneva : CERN, 2017 - 6 p. Fulltext: PDF; In : 22nd International Conference on Computing in High Energy and Nuclear Physics, CHEP 2016, San Francisco, Usa, 10 - 14 Oct 2016

2017-02-27
13:38
 Python object-oriented framework for consuming, manipulating and releasing non-event data for the CMS alignment and calibration. / Dawes, Joshua Heneage (CERN) /CMS Collaboration The Alignment, Calibrations and Databases group at the CMS Experiment delivers Alignment and Calibration Conditions Data to a large set of workflows which process recorded event data and produce simulated events. The current infrastructure for releasing and consuming Conditions Data was designed in the two years of the first LHC long shutdown to respond to use cases from the preceding data-taking period. [...] CMS-CR-2017-042.- Geneva : CERN, 2017 - 9 p. Fulltext: PDF; In : 22nd International Conference on Computing in High Energy and Nuclear Physics, CHEP 2016, San Francisco, Usa, 10 - 14 Oct 2016

2017-02-27
13:36
 Continuous and fast calibration of the CMS experiment design of the automated workflows and operational experience. / Oramus, Piotr Karol (CERN) ; Cerminara, Gianluca (CERN) ; Pfeiffer, Andreas (CERN) ; Franzoni, Giovanni (CERN) ; Govi, Giacomo Maria (Fermilab) ; Musich, Marco (Louvain U.) ; Di Guida, Salvatore (INFN, Naples) /CMS Collaboration The exploitation of the full physics potential of the LHC experimentsrequires fast and efficient processing of the largest possible datasetwith the most refined understanding of the detector conditions. Toface this challenge, the CMS collaboration has setup an infrastructure for thecontinuous unattended computation of the alignment and calibrationconstants, allowing for a refined knowledge of the most time-criticalparameters already a few hours after the data have been saved to disk.This is the prompt calibration framework which, since the beginning ofthe LHC Run-I, enables the analysis and the High Level Trigger of theexperiment to consume the most up-to-date conditions optimizingthe performance of the physics objects. [...] CMS-CR-2017-058.- Geneva : CERN, 2017 - 9 p. Fulltext: PDF; In : 22nd International Conference on Computing in High Energy and Nuclear Physics, CHEP 2016, San Francisco, Usa, 10 - 14 Oct 2016

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