# CMS Detector Performance Summaries

2015-08-03
12:51
 Nuclear interaction study around beam pipe region in the Tracker system at CMS with 13 TeV data /CMS Collaboration Analysis is presented to study the material in the Tracker system with nuclear interactions from proton-proton collisions recorded by the CMS experiment at the CERN LHC. The data correspond to an integrated luminosity of 7.3 pb$^{-1}$ at a centre-of-mass energy of 13 TeV collected at 3.8 Tesla magnetic field. [...] CMS-DP-2015-024; CERN-CMS-DP-2015-024.- Geneva : CERN, 2015 - 2 p. Fulltext: PDF;

2015-08-03
11:27
 First BHM performance plots /CMS Collaboration A new detector to measure the machine induced background at large radii (1.8 m from beam axis) has been developed and installed in the CMS experiment at LHC. It consists of 40 modules, each comprising a quartz bar read out by a photomultiplier. [...] CMS-DP-2015-023; CERN-CMS-DP-2015-023.- Geneva : CERN, 2015 - 5 p. Fulltext: PDF;

2015-08-03
09:57
 Pixel Luminosity Telescope (PLT) calibration and first measurements /CMS Collaboration The Pixel Luminosity Telescope is a new complement to the CMS detector for the LHC Run II data taking period. It consists of eight 3-layer telescopes based on silicon pixel detectors that are placed around the beam pipe on each side of CMS viewing the interaction point at small angle. [...] CMS-DP-2015-025; CERN-CMS-DP-2015-025.- Geneva : CERN, 2015 - 12 p. Fulltext: PDF;

2015-08-03
09:56
 1-D plot covering CMS tracker, showing FLUKA simulated 1 MeV neutron equivalent in Silicon including contributions from various particle types. /CMS Collaboration FLUKA simulated 1 MeV neutron equivalent in Silicon (1~MeV~n-eq) at the CMS Tracker, plotted as function of R at Z~=~0 and Z~=~250\,cm. The total 1~MeV~n-eq is shown, as well as the individual contributions from neutrons, protons and pions to the 1~MeV~n-eq fluence. [...] CMS-DP-2015-022; CERN-CMS-DP-2015-022.- Geneva : CERN, 2015 - 5 p. Fulltext: PDF;

2015-08-03
09:56
 A new on-line luminometer and beam conditions monitor using single crystal diamond sensors /CMS Collaboration Instrumentation near the beam-pipe requires extremely radiation hard sensors. Inside CMS two rings instrumented with 12 single crystal diamond sensors each are installed on both sides of the interaction point. [...] CMS-DP-2015-012; CERN-CMS-DP-2015-012.- Geneva : CERN, 2015 - 7 p. Fulltext: PDF;

2015-07-26
13:15
 Charged hadron multiplicity at 13 TeV: first performance studies /CMS Collaboration The first collisions at 13TeV ere used to derive a very preliminary measurement of the distribution of the charged hadron multiplicity in function of pseudorapidity.. CMS-DP-2015-011; CERN-CMS-DP-2015-011.- Geneva : CERN, 2015 - 5 p. Fulltext: PDF;

2015-07-24
11:50
 Selected Heavy Flavor distributions from CMS with first 13 TeV data We report plots on heavy flavors from the early data collected by CMS at LHC at 13 TeV. We show dimuon invariant mass spectra for triggers deployed for heavy flavors analyses, performances on Quarkonia, B and D mesons. [...] CMS-DP-2015-018; CERN-CMS-DP-2015-018.- Geneva : CERN, 2015 - 37 p. Fulltext: PDF;

2015-07-24
11:50
 First Results from Dijet Resonance Search using 37 pb$^{-1}$ of proton-proton collisions at $\sqrt{s}$=13 TeV /CMS Collaboration We present the first results of a search for new particles decaying to jet pairs using the dijet mass spectrum measured by the CMS detector in pp collisions at $\sqrt{s}$=13 TeV. The data used correspond to an integrated luminosity of 37 pb$^{-1}$. [...] CMS-DP-2015-017; CERN-CMS-DP-2015-017.- Geneva : CERN, 2015 - 9 p. Fulltext: PDF;

2015-07-24
11:50
 Event display of a boosted ttbar event at 13 TeV /CMS Collaboration Event display of a boosted ttbar event at 13 TeV CMS-DP-2015-020; CERN-CMS-DP-2015-020.- Geneva : CERN, 2015 - 6 p. Fulltext: PDF;

2015-07-24
11:50
 First look at top-quark selections with 13 TeV data /CMS Collaboration This Performance Note presents some illustrative event displays and distributions of observables designed to study top-quark pairs, in the electron plus muon and in the single-lepton plus jets final states, and an event that passes a selection designed for single top produced by the t-channel electroweak mechanism with a single-muon final state. The data set consists of the first proton-proton collision data recorded by the CMS detector at a center-of-mass energy of 13 TeV with a magnetic field of 3.8 Tesla in the solenoid, during the LHC development run with a bunch spacing of 50 ns that took place in July 2015. [...] CMS-DP-2015-019; CERN-CMS-DP-2015-019.- Geneva : CERN, 2015 - 16 p. Fulltext: PDF;