Searches for Supersymmetry at ATLAS

Recent results of searches for supersymmetry by the ATLAS Collaboration in up to 4.7 fb−1 of √s = 7TeV pp collisions recorded with the LHC in 2011 are reported. Emphasis is placed on the different classes of supersymmetric particles being sought and limits are set within the context of a wide variety of models

New Physics at the LHC. A Les Houches Report: Physics at TeV Colliders 2009 - New Physics Working Group

We present a collection of signatures for physics beyond the standard model that need to be explored at the LHC. First, are presented various tools developed to measure new particle masses in scenarios where all decays include an unobservable particle. Second, various aspects of supersymmetric models are discussed. Third, some signatures of models of strong electroweak symmetry are discussed. In the fourth part, a special attention is devoted to high mass resonances, as the ones appearing in models with warped extra dimensions. Finally, prospects for models with a hidden sector/valley are presented. Our report, which includes brief experimental and theoretical reviews as well as original results, summarizes the activities of the "New Physics" working group for the "Physics at TeV Colliders" workshop (Les Houches, France, 8-26 June, 2009).Comment: 189 page

New Physics at the LHC. A Les Houches Report: Physics at TeV Colliders 2009 - New Physics Working Group

We present a collection of signatures for physics beyond the standard model that need to be explored at the LHC. First, are presented various tools developed to measure new particle masses in scenarios where all decays include an unobservable particle. Second, various aspects of supersymmetric models are discussed. Third, some signatures of models of strong electroweak symmetry are discussed. In the fourth part, a special attention is devoted to high mass resonances, as the ones appearing in models with warped extra dimensions. Finally, prospects for models with a hidden sector/valley are presented. Our report, which includes brief experimental and theoretical reviews as well as original results, summarizes the activities of the "New Physics" working group for the "Physics at TeV Colliders" workshop (Les Houches, France, 8-26 June, 2009)

Energy Resolution Performance of the CMS Electromagnetic Calorimeter

The energy resolution performance of the CMS lead tungstate crystal electromagnetic calorimeter is presented. Measurements were made with an electron beam using a fully equipped supermodule of the calorimeter barrel. Results are given both for electrons incident on the centre of crystals and for electrons distributed uniformly over the calorimeter surface. The electron energy is reconstructed in matrices of 3 times 3 or 5 times 5 crystals centred on the crystal containing the maximum energy. Corrections for variations in the shower containment are applied in the case of uniform incidence. The resolution measured is consistent with the design goals

Test beam results from the CMS electromagnetic calorimeter

A precision lead tungstate crystal calorimeter is being constructed by the CMS collaboration. As a key part of the future CMS detector at the LHC, the electromagnetic calorimeter will play a major role in probing electroweak symmetry-breaking and searches for new physics. In order to check that the required performance of the electromagnetic calorimeter is attainable, every prototype is tested in real conditions within a beam of particles. In 2003 two modules of the electromagnetic calorimeter featuring the final mechanical design and electronic architecture have been tested with two different versions of the front-end electronics. In this paper a review of the main results of test beam campaigns in 2002 and 2003 are given. (7 refs)

CMS electromagnetic calorimeter performance and test beam results

Energy resolution of the CMS crystal electromagnetic calorimeter has been measured with an electron test beam using a fully equipped barrel supermodule. Both intrinsic energy resolution and energy resolution for electrons with quasi-uniform impact on the crystal surface are measured. The amplitude of the signal collected from crystals is reconstructed by a digital filtering technique and corrections for the position dependent response are applied in the case of quasi-uniform impact. The resolution measured for the supermodule is fully compatible with design expectations

Triple and quartic gauge couplings at LEP2

We review the status of published and preliminary measurements of triple and quartic gauge boson couplings from the four LEP experiments. Charged current triple gauge boson couplings (WWZ and WWγ) are measured using W-pair, single-W and single-γ productions with the data collected between 1997 and 2000 ($700\ \mathrm{pb}^{-1}$ per experiment). Neutral current triple gauge boson couplings are studied with Zγ (Zγ γ * and ZγZ* vertices) and ZZ (ZZγ * and ZZZ* vertices) events. Limits on anomalous quartic gauge boson couplings with at least one photon (WWγ γ, WWZγ and ZZγ γ) are set from WWγ, $q\bar{q}\gamma\gamma$ and $\nu\bar{\nu}\gamma\gamma$ events. No strong deviations from the Standard Model expectations are found

LHC Inclusive Searches for SUSY

This talk describes the search for generic SUSY models with $R$-parity conservation in the ATLAS and CMS detectors at the CERN Large Hadron Collider. Such particles would be produced in pairs and decay to the lightest SUSY particle which escapes the detector, giving signatures involving jets, possible leptons, and \met. Results of simulation studies performed by the CMS and ATLAS collaborations are presented. The discovery reach of new physics within the first fb-1 of collected integrated luminosity is shown