# CERN Preprints

2014-12-19
18:48
 Search for physics beyond the standard model in dilepton mass spectra in proton-proton collisions at $\sqrt{s}$ = 8 TeV Dimuon and dielectron mass spectra, obtained from data resulting from proton-proton collisions at 8 TeV and recorded by the CMS experiment, are used to search for both narrow resonances and broad deviations from standard model predictions. [...] CERN-PH-EP-2014-272 ; CMS-EXO-12-061-003. - 2014. Additional information for the analysis - CMS AuthorList - Fulltext

2014-12-19
18:03
 Search for charged Higgs bosons decaying via $H^{\pm} \rightarrow \tau^{\pm}\nu$ in fully hadronic final states using $pp$ collision data at $\sqrt{s} = 8$ TeV with the ATLAS detector The results of a search for charged Higgs bosons decaying to a $\tau$ lepton and a neutrino, $H^{\pm} \rightarrow \tau^{\pm} \nu$, are presented. [...] CERN-PH-EP-2014-274. - 2014. Fulltext - Previous draft version

2014-12-19
10:04
 Secondary emission yield at low-primary energies of magnetic materials for anti-multipactor applications / Aguilera, L ; Montero, I ; Olano, L ; Casas, A ; Morales, P ; Vázquez, M ; Galán, L ; Caspers, F ; Costa-Pinto, P ; Taborelli, M et al. Secondary electron emission processes under electron bombardment are central to many effects at surfaces and interfaces, and to many in vacuum high power RF electronic devices where multipactor can be very intense [1,2]. [...] CERN-ACC-2014-0354. - 2014. - 6 p. Full text

2014-12-19
08:54
 CMS computing upgrade and evolution / Hernandez Calama, Jose (Madrid, CIEMAT) /CMS Collaboration The distributed Grid computing infrastructure has been instrumental in the successful exploitation of the LHC data leading to the discovery of the Higgs boson. The computing system will need to face new challenges from 2015 on when LHC restarts with an anticipated higher detector output rate and event complexity, but with only a limited increase in the computing resources. [...] CMS-CR-2013-444.- Geneva : CERN, 2013 - 6 p. Fulltext: PDF; In : 2013 IEEE Nuclear Science Symposium and Medical Imaging Conference, Seoul, Korea, Kor, 26 Oct - 2 Nov 2013

2014-12-19
08:54
 Challenging Data Management in CMS Computing with Network-aware Systems / Bonacorsi, Daniele (INFN, Bologna ; Bologna U.) ; Wildish, Anthony (Princeton U.) /CMS Collaboration After a successful first run at the LHC, and during the Long Shutdown (LS1) of the accelerator, the workload and data management sectors of the CMS Computing Model are entering into an operational review phase in order to concretely assess area of possible improvements and paths to exploit new promising technology trends. In particular, since the preparation activities for the LHC start, the Networks have constantly been of paramount importance for the execution of CMS workflows, exceeding the original expectations - as from the MONARC model - in terms of performance, stability and reliability. [...] CMS-CR-2013-426.- Geneva : CERN, 2013 - 7 p. Fulltext: PDF; In : 2013 IEEE Nuclear Science Symposium and Medical Imaging Conference, Seoul, Korea, Kor, 26 Oct - 2 Nov 2013

2014-12-19
08:54
 Data preparation for the Compact Muon Solenoid experiment / Franzoni, Giovanni (CERN) /CMS Collaboration During the first 3 years of operation at the Large Hadron Collider, the Compact Muon Solenoid (CMS) experiment has collected data across evolving conditions of center of mass energy, instantaneous luminosity and collisions pile up. Following this evolution, the CMS collaboration has constantly strived to guarantee the prompt availability of high quality reconstructed data, in order to ensure early and sound physics results. [...] CMS-CR-2013-414.- Geneva : CERN, 2013 - 6 p. Fulltext: PDF; In : 2013 IEEE Nuclear Science Symposium and Medical Imaging Conference, Seoul, Korea, Kor, 26 Oct - 2 Nov 2013

2014-12-19
08:48
 The Common Analysis Framework Project / Mascheroni, Marco (INFN, Milan Bicocca) /ATLAS and CMS Collaborations ATLAS, CERN-IT, and CMS embarked on a project to develop a common system for analysis workflow management, resource provisioning and job scheduling in the distributed computing infrastructure based on elements of PanDA. After an extensive feasibility study and development of a proof-of-concept prototype, the project has now a basic infrastructure that can be used to support the analysis use case of both experiments with common services. [...] CMS-CR-2013-411.- Geneva : CERN, 2013 - 8 p. Fulltext: PDF; In : 20th International Conference on Computing in High Energy and Nuclear Physics 2013, Amsterdam, Netherlands, 14 - 18 Oct 2013

2014-12-18
19:11
 Observation and measurements of the production of prompt and non-prompt $J/\psi$ mesons in association with a $Z$ boson in $pp$ collisions at $\sqrt{s}= 8$ TeV with the ATLAS detector The production of a $Z$ boson in association with a $J/\psi$ meson in proton--proton collisions probes the production mechanisms of quarkonium and heavy flavour in association with vector bosons, and allows studies of multiple parton scattering. [...] CERN-PH-EP-2014-276. - 2014. Fulltext - Previous draft version

2014-12-18
11:00
 Physics Performance with the CMS Pixel Detector / Meier, Frank (Nebraska U.) /CMS Collaboration A large fraction of the results produced by the LHC experiments during the first run were made possible by precision vertexing detectors. The all-silicon tracking detector of the CMS experiment uses a pixel detector to do vertexing. [...] CMS-CR-2014-437.- Geneva : CERN, 2014 - 6 p. Fulltext: PDF; In : Pixel 2014 7th International Workshop on Semiconductor Pixel Detectors for Particles and Imaging, Niagara Falls, Ontario, Canada, 1 - 5 Sep 2014

2014-12-18
11:00
 CMS Data preparation for Run II / Fabozzi, Francesco (INFN, Naples ; Basilicata U., Potenza) /CMS Collaboration The Run II of the Large Hadron Collider will confront us with new challenges, mainly due to the higher number of interactions per bunch crossing and the reduced time distance between bunches. In order to be ready for the beginning of the run, in view of an early discovery, the CMS collaboration is currently evolving the infrastructure established during Run I to monitor the data quality, to validate the progresses on detector simulation, event reconstruction, physics objects definition, and to handle large production of simulated events. [...] CMS-CR-2014-428.- Geneva : CERN, 2014 - 4 p. Fulltext: PDF; In : Conference Information and Promotion Committee (CIP) for the IEEE – Nuclear Science Symposium and Medical Imaging Conference, and Room-Temperature Semiconductor X-Ray and Gamma-Ray Detectors workshop (IEEE NSS-MIC), Seattle, WA, USA, 8 - 15 Nov 2014