# CMS Conference Reports

Posledne pridané:
2014-02-14
10:05
 A Brief Review of CMS Jet Measurements / Salur, Sevil (Rutgers U., Piscataway) /CMS Collaboration We present an overview of the current status of the recent jet measurements in PbPb and pp collisions at a nucleon-nucleon center-of-mass energy of 2.76 TeV that are studied with the CMS detector at the LHC. Jets are reconstructed using the anti-$\rm k_T$ sequential reconstruction algorithm on particle flow objects. [...] CMS-CR-2014-010; CERN-CMS-CR-2014-010.- Geneva : CERN, 2014 - 9 p. Fulltext: PDF;

2014-02-14
10:04
 Searches for new massive resonances decaying to leptons at CMS / Reis, Thomas (Brussels U.) /CMS Collaboration Searches for new bosonic resonances decaying to a charged lepton plus neutrino ($W'\rightarrow l\nu$) or to two charged leptons ($Z'\rightarrow l^+l^-$), using the 2012 dataset from $pp$ collisions at $8\mbox{ TeV}$ collected by the CMS experiment and corresponding to about $20\mbox{ fb}^{-1}$, are presented. In absence of a significant deviation from the standard model predictions, upper limits on the new resonance production cross section times branching fraction are estimated.. CMS-CR-2014-012; CERN-CMS-CR-2014-012.- Geneva : CERN, 2014 - 5 p. Fulltext: PDF;

2014-02-10
09:34
 Search for new physics using events with two same-sign isolated leptons in the final state at CMS / Folgueras, S (Oviedo U.) ; Dünser, M (Zurich, ETH) /CMS Collaboration We present a search for new physics using events with two same-sign isolated leptons with the presence of b-jets in the final state, targetting SUSY scenarios by strong production of squarks and gluinos where the 3 rd generation squarks are lighter than other squarks. No excess above the standard model background is observed [...] CMS-CR-2013-158; CERN-CMS-CR-2013-158.- Geneva : CERN, 2013 - 5 p. - Published in : EPJ Web Conf. 60 (2013) 20036 Published version, Open Access file: PDF; In : 1st Large Hadron Collider Physics Conference, Barcelona, Spain, 13 - 18 May 2013, pp.20036

2014-02-07
10:41
 Inclusive searches for SUSY from CMS / Draeger, Arne-rasmus (Hamburg U.) /CMS Collaboration In this talk, the latest results on inclusive SUSY searches from CMS are reviewed. We present searches for squarks, charginos and neutralinos, in variety of decay modes and final states, including jets and/or leptons and large missing energy, using up to 20/fb of data from the 8 TeV LHC run of 2012.. CMS-CR-2014-009; CERN-CMS-CR-2014-009.- Geneva : CERN, 2014 - 9 p. Fulltext: PDF;

2014-02-03
15:36
 Status of the Triple-GEM Project for the Upgrade of the CMS Muon System / Tytgat, Michael (Gent U.) /CMS Collaboration The GEMs for CMS collaboration is performing a feasibility study to install triple-GEM detectors in the forward region of the muon system ($1.6<\eta<2.4$) of the CMS detector at the LHC. Such micro-pattern gas detectors are able to cope with the extreme particle rates that are expected in that region during the High Luminosity phase of the LHC. [...] CMS-CR-2013-298; CERN-CMS-CR-2013-298.- Geneva : CERN, 2013 - 15 p. Fulltext: PDF;

2014-01-30
14:38
 CMS results on physics of top quarks / Keaveney, James Michael (Vrije U., Brussels) /CMS Collaboration The CMS top quark physics program consists of measurements of the cross sections of processes involving top quarks, the top-quark mass, and the properties of the top quark. The analyses described in this note utilise data recorded by CMS at centre-of-mass energies of 7 and 8 TeV between the years 2010 and 2012. [...] CMS-CR-2014-007; CERN-CMS-CR-2014-007.- Geneva : CERN, 2014 - 11 p. Fulltext: PDF;

2014-01-29
15:56
 Commissioning, operation and performance of the CMS Silicon Strip Tracker detector / Demina, Regina (Rochester U.) /CMS Collaboration The CMS silicon strip tracker is the largest device of this type ever built for detection of charge particles produced in beam-beam collisions. There are 24244 single-sided micro-strip sensors covering an active area of over 200 square meters, and nearly 10 millions channels to be read out. [...] CMS-CR-2009-358; CERN-CMS-CR-2009-358.- Geneva : CERN, 2009 - 8 p. Fulltext: PDF;

2014-01-28
16:16
 Quarkonium production and polarization in pp collisions with the CMS detector / Argiro, Stefano (INFN, Turin ; Turin U.) /CMS Collaboration Studies of the production of heavy quarkonium states are very important to improve our understanding of QCD and hadron formation, given that the heavy quark masses allow the application of theoretical tools less sensitive to nonperturbative effects.Thanks to a dedicated dimuon trigger strategy, combined with the record-level energy and luminosity provided by the LHC, the CMS experiment could collect large samples of pp collisions at 7 and 8 TeV, including quarkonium states decaying in the dimuon channel. This allowed the CMS collaboration to perform a series of systematic measurements in quarkonium production physics, including double-differential cross sections and polarizations, as a function of rapidity and pT, for five S-wave quarkonia J/psi, psi(2S), Y(1S), Y(2S), and Y(3S). [...] CMS-CR-2014-006; CERN-CMS-CR-2014-006.- Geneva : CERN, 2014 - 6 p. Fulltext: PDF;

2014-01-27
15:43
 CMS outer tracker detector upgrade plans. / Eckstein, Doris (DESY) /CMS Collaboration With the upgrade of the LHC to the high-luminosity LHC (HL-LHC), also the tracker system of the CMS experiment will have to be upgraded. It is planned to use information from the tracker in the first level trigger of CMS. [...] CMS-CR-2014-008; CERN-CMS-CR-2014-008.- Geneva : CERN, 2014 - 11 p. Fulltext: PDF;

2014-01-24
08:04
 Plans and Status of the Phase~I Upgrade of the CMS Pixel Tracker / Perrey, Hanno Christopher (DESY) /CMS Collaboration The silicon pixel detector is the innermost component of the CMS tracking system and plays a crucial role in the all-silicon CMS tracker. While the current pixel tracker is designed for and performing well at an instantaneous luminosity of up to $1\times10^{34}$\,cm$^{-2}${s}$^{-1}$, it can no longer be operated efficiently at significantly higher values. Based on the strong performance of the LHC accelerator, it is anticipated that peak luminosities of two times the design luminosity are likely to be reached before 2018 and perhaps significantly exceeded in the running period until 2022, referred to as Phase~I. Therefore an upgrade is planed for the year-end technical stop in 2016: With a new pixel readout chip (ROC), an additional fourth layer, two additional endcap disks, and a significantly reduced material budget the upgraded pixel detector will be able to sustain the efficiency of the pixel tracker at the increased requirements imposed by high luminosities and pile-up. In this contribution, the new design of the pixel detector along with its expected physics performance will be presented. [...] CMS-CR-2014-005; CERN-CMS-CR-2014-005.- Geneva : CERN, 2014 - 11 p. Fulltext: PDF;