for the CMS Collaboration

Publications (14)0 Total impact

• Article: Top Quark Production

  Andreas B. Meyer, for the ATLAS Collaboration, for the CDF Collaboration, for the CMS Collaboration, for the Collaboration
  [show abstract] [hide abstract]
  ABSTRACT: Recent measurements of top quark pair and single top production are presented. The results include inclusive cross sections as well as studies of differential distributions. Evidence for single top quark production in association with a W-boson in the final state is reported for the first time. Calculations in perturbative QCD up to approximate next-to-next-to-leading order show very good agreement with the data.
  12/2012;
• Article: Searches for new fermions and new bosons

  Petra Van Mulders, for the CMS Collaboration, for the ATLAS Collaboration
  [show abstract] [hide abstract]
  ABSTRACT: The high center-of-mass energy at the LHC provides the opportunity to test the predictions of some of the beyond the standard model theories. We provide an overview of a selected number of searches for new fermions and new bosons with the ATLAS and CMS experiments. No evidence for the existence of new particles was found and therefore limits are obtained on the parameters of the models under consideration.
  12/2012;
• Article: Top anti-top Asymmetries at the Tevatron and the LHC

  Yvonne Peters, for the ATLAS Collaboration, for the CDF Collaboration, for the CMS Collaboration, for the Collaboration
  [show abstract] [hide abstract]
  ABSTRACT: The heaviest known elementary particle today, the top quark, has been discovered in 1995 by the CDF and D0 collaborations at the Tevatron proton antiproton collider at Fermilab. Recently, the CDF and D0 collaborations have studied the forward-backward asymmetry in ttbar events, resulting in measured values larger than the standard model prediction. With the start of the LHC at CERN in 2010, a new top quark factory has opened and asymmetry measurements in ttbar have also been performed in a proton proton environment with higher collision energy. No deviations from the standard model have been noticed so far in the measurements of ATLAS and CMS. This article discusses recent results of asymmetry measurements in ttbar events of the ATLAS, CDF, CMS and D0 collaborations.
  11/2012;
• Article: W/Z + jet Production at the LHC

  Gavin Hesketh, for the ATLAS Collaboration, for the CMS Collaboration
  [show abstract] [hide abstract]
  ABSTRACT: This paper summarises results on W and Z plus jet production in pp collisions at $\sqrt{s} = 7$ TeV at the CERN Large Hadron Collider, from both the ATLAS and CMS experiments. Based on the 2010 and 2011 datasets, measurements have been made of numerous cross sections providing excellent tests of the latest predictions from QCD calculations and event generators.
  11/2012;
• Article: Observation of a new \chi_b state at ATLAS and a new \Xi_b baryon at CMS

  Andrew Chisholm, for the ATLAS Collaboration, for the CMS Collaboration
  [show abstract] [hide abstract]
  ABSTRACT: Two recent observations of new b hadrons in pp collisions at \sqrt{s} = 7 TeV at the Large Hadron Collider (LHC) are presented. The ATLAS collaboration has observed a new state in radiative transitions to \Upsilon(1S) and \Upsilon(2S) and interprets this as the first observation of the \chi_b(3P) states. The CMS collaboration has observed a new b baryon decaying to \Xi_b-\pi+ (plus charge conjugates). This is interpreted as a neutral J^P = 3/2^+ \Xi_b* baryon.
  07/2012;
• Article: Recent results on Top quark Physics with the ATLAS and CMS experiments

  Pedro Silva, for the ATLAS Collaboration, for the CMS Collaboration
  [show abstract] [hide abstract]
  ABSTRACT: An overview of the most recent results on top quark physics obtained using proton-proton collision data collected with the ATLAS and the CMS experiments at 7 TeV center-of-mass energy is given. Measurements for inclusive and differential top quark pair or single top quark production in different final states are reviewed. Top properties such as W helicity in top decays, electric charge, charge asymmetry and spin correlations of top quark pairs, among others have also been measured by the LHC experiments. All the measurements are found to be consistent with the Standard Model predictions with a good level of accuracy. The latest results in the measurement of the top quark mass at the LHC are also presented and discussed.
  06/2012;
• Article: W/Z + jets and W/Z + heavy flavor production at the LHC

  A. A. Paramonov, for the ATLAS Collaboration, for the CMS Collaboration
  [show abstract] [hide abstract]
  ABSTRACT: The ATLAS and CMS experiments at the LHC conduct an extensive program to study production of events with a W or Z boson and particle jets. Dedicated studies focus on final states with the jets containing decays of heavy-flavor hadrons (b-tagged jets). The results are obtained using data from proton-proton collisions at sqrt{s}=7 TeV from the LHC at CERN. The set of measurements constitute a stringent test of the perturbative QCD calculations.
  06/2012;
• Source

  Available from: ArXiv

  Article: W Mass results from Tevatron and LHC

  Alex Melnitchouk, for the ATLAS Collaboration, for the CDF Collaboration, for the CMS Collaboration, for the Collaboration, for the LHCb Collaboration
  [show abstract] [hide abstract]
  ABSTRACT: Most recent results of $W$ boson mass measurements from Tevatron experiments (CDF and D0) in $p\bar{p}$ collisions at $\sqrt{s}=1.96$ GeV are reported, using $0.2 fb^{-1}$ and $1.0 fb^{-1}$ data collected at CDF and D0, respectively. The measurements of $W$ boson properties at LHC experiments (ATLAS, CMS, and LHCb) in $pp$ collisions at $\sqrt{s}=7$ TeV, using data collected before Summer 2011, are presented. These measurements are essential at the preparation stage of the $W$ boson mass measurements at LHC. Challenges for $W$ mass measurement at the LHC in comparison with the Tevatron are outlined. Prospects for $W$ mass precision with upcoming measurements and its implications are discussed.
  01/2012;
• Source

  Available from: ArXiv

  Article: Exotic Searches at LHC and Tevatron

  Shahram Rahatlou, for the ATLAS Collaboration, for the CDF Collaboration, for the CMS Collaboration, for the Collaboration
  [show abstract] [hide abstract]
  ABSTRACT: Successful operation of the Large Hadron Collider has led to more than 1 fb^-1 of data recorded with both ATLAS and CMS detectors by summer of 2011. This large amount of data has allowed to perform numerous searches for rare processes beyond the Standard Model, many of which are competitive with previous searches performed with the CDF and D0 detectors at the Tevatron. In this talk the most recent searches at the hadron colliders are reviewed.
  01/2012;
• Source

  Available from: ArXiv

  Article: High pT Jet Physics

  Richard Teuscher, for the ATLAS Collaboration, for the CMS Collaboration, for the CDF Collaboration, for the Collaboration
  [show abstract] [hide abstract]
  ABSTRACT: This report gives a selection of recent jet results from the LHC and Tevatron, including inclusive jet production, dijets, and jets produced in association with massive vector bosons.
  11/2011;
• Source

  Available from: ArXiv

  Article: Searches for New Physics at the Tevatron and LHC

  Peter Wittich, for the ATLAS Collaboration, for the CDF Collaboration, for the CMS Collaboration, for the Collaboration
  [show abstract] [hide abstract]
  ABSTRACT: This is an auspicious moment in experimental particle physics -there are large data samples at the Tevatron and a new energy regime being explored at the Large Hadron Collider with ever larger data samples. The coincidence of these two events suggests that we will soon be able to address the question, what lies beyond the standard model? Particle physics's current understanding of the universe is embodied in it. The model has been tested to extreme precision - better than a part in ten thousand - but we suspect that it is only an approximation, and that physics beyond this standard model will appear in the data of the Tevatron and LHC in the near future. This brief review touches on the status of searches for new physics at the time of the conference.
  11/2011;
• Source

  Available from: ArXiv

  Article: Production and Spectroscopy of Heavy Hadrons at the LHC

  H. Evans, for the ALICE Collaboration, for the ATLAS Collaboration, for the CMS Collaboration, for the LHCb Collaboration
  [show abstract] [hide abstract]
  ABSTRACT: Measurements of heavy flavor production and decay have featured prominently in the early results from the four large LHC experiments: ALICE, ATLAS, CMS, and LHCb. These results provide tests of QCD models in a new energy region and point the way toward future measurements of CP violation and searches for new physics. An overview of open heavy flavor studies is presented here, focusing on how the new measurements extend our knowledge of this area of physics. Heavy quarkonia states at the LHC are summarized in other proceedings of this conference. I also discuss briefly how heavy flavor measurements are likely to evolve as LHC luminosities increase.
  10/2011;
• Source

  Available from: ArXiv

  Article: Top quark physics expectations at the LHC

  Andrei Gaponenko, for the ATLAS Collaboration, for the CMS Collaboration
  [show abstract] [hide abstract]
  ABSTRACT: The top quark will be produced copiously at the LHC. This will make both detailed physics studies and the use of top quark decays for detector calibration possible. This talk reviews plans and prospects for top physics activities in the ATLAS and CMS experiments.
  11/2008;
• Source

  Available from: ArXiv

  Article: Discovery Potential for the SM Higgs Boson in the Inclusive Search Channels

  Alexander Schmidt, for the CMS Collaboration, for the ATLAS Collaboration
  [show abstract] [hide abstract]
  ABSTRACT: This paper gives an overview of the potential to discover a Standard Model Higgs Boson in the inclusive search channels at the ATLAS and CMS experiments at the LHC. The most important decay modes, $H \to \gamma \gamma$, $H \to WW \to ll\nu\nu$ and $H \to ZZ \to 4l$ are described and a summary of recently published analyses using realistic detector simulations is presented.
  11/2007;