Mr
Davide Pagani
(Max-Planck-Institut fรผr Physik (DE))
05/07/2012, 09:00
Track 2 - Beyond the Standard Model - SUSY
Parallel Sessions
We present the analysis of the signature jj+missing-ET(+X) via squark-squark production and direct decay into the lightest neutralino in next-to-leading order QCD within the framework of the minimal supersymmetric Standard Model. We provide a consistent, fully differential calculation of NLO QCD factorizable corrections to the given processes with on-shell squarks. Clustering final states...
Dr
Peter Marquard
(KIT (DE))
05/07/2012, 09:15
Track 2 - Beyond the Standard Model - SUSY
Parallel Sessions
We present a next-to-leading order calculation for the production of gluino pairs near threshold at the LHC. We show that threshold effects lead to a characteristic shape of the differential cross section around threshold and an increase of the total cross section.
Mr
Moritz Backes
(Universite de Geneve (CH))
05/07/2012, 09:30
Track 2 - Beyond the Standard Model - SUSY
Parallel Sessions
Despite the absence of experimental evidence, weak scale supersymmetry remains one of the best motivated and studied Standard Model extensions. This talk summarises recent results on inclusive searches for supersymmetric squarks and gluinos in events containing jets, missing transverse momentum with or without leptons. The searches use the full data sample recorded in 2011 at sqrt(s)=7 TeV...
Dr
Seema Sharma
(Fermi National Accelerator Lab. (US))
05/07/2012, 09:45
Track 2 - Beyond the Standard Model - SUSY
Parallel Sessions
We present results of searches for SUSY production at CMS in events containing hadronic jets and missing energy. Various discriminants based on the event kinematics are employed to suppress standard-model backgrounds. The results are interpreted in the context of the Constrained Minimal Supersymmetric Standard Model, and of a number of "simplified models".
Prof.
Kajari Mazumdar
(Tata Institute of Fundamental Research)
05/07/2012, 10:00
Track 2 - Beyond the Standard Model - SUSY
Parallel Sessions
We search for evidence of Supersymmetry in events with a single lepton, multijets and missing energy. The search is done with proton-proton collision data collected by the CMS detector at the CERN Large Hadron Collider. The backgrounds, which are primarily from W+jet and top quark production, are predicted with control samples in the data. The results are interpreted in terms of the...
Dr
Pablo Martinez Ruiz Del Arbol
(Eidgenoessische Tech. Hochschule Zuerich (CH))
05/07/2012, 10:15
Track 2 - Beyond the Standard Model - SUSY
Parallel Sessions
We present results of searches for SUSY production at CMS in events with multiple lepton production. These include final states with Z bosons decaying to lepton pairs, non-resonant same- and opposite-sign lepton pairs, and three or more isolated leptons. The results are used to exclude previously unexplored regions of the supersymmetric parameter space assuming R-parity conservation with the...
Dr
James Alexander Kraus
(Michigan State University (US))
05/07/2012, 11:00
Track 2 - Beyond the Standard Model - SUSY
Parallel Sessions
We present a search for the pair production of scalar top quarks (stop_1), the lightest supersymmetric partners of the top quarks, in ppbar collisions at a center-of-mass energy of 1.96 TeV, using data corresponding to an integrated luminosity of 7.3 fb^-1 collected with the D0 experiment at the Fermilab Tevatron Collider. Each scalar top quark is assumed to decay into a b quark, a charged...
Dr
Martin John White
(University of Melbourne (AU))
05/07/2012, 11:15
Track 2 - Beyond the Standard Model - SUSY
Parallel Sessions
Naturalness arguments for weak-scale supersymmetry favour supersymmetric partners of the third generation quarks with masses not too far from those of their Standard Model counterparts. Scalar top or bottom quarks with masses less than a few hundred GeV can give rise to direct pair production rates at the LHC that can be observed in the data sample recorded by the ATLAS detector. The talk...
Dr
Altan Cakir
(Deutsches Elektronen-Synchrotron (DE))
05/07/2012, 11:30
Track 2 - Beyond the Standard Model - SUSY
Parallel Sessions
We present results of searches for SUSY production at CMS in events with third-generation signatures. Along with missing energy, the final states may include hadronic jets with or without b-quark tag, light leptons, and tau leptons. These features serve both to distinguish standard-model components, and for sensitivity to those SUSY models that lead to final states rich in heavy-flavored particles.
Mr
Steffen Schaepe
(Universitรคt Bonn (DE))
05/07/2012, 11:45
Track 2 - Beyond the Standard Model - SUSY
Parallel Sessions
Models with gauge-mediated supersymmetry breaking predict that the lightest supersymmetric particle is a gravitino with negligible mass so that the phenomenology of the supersymmetric events produced at the LHC is determined by the next-to-lightest supersymmetric particle (NLSP). Depending on the model parameters, the NLSP can be a neutralino with significant bino admixture that will decay...
488.
Search for Z+photon events with Large Missing Transverse Energy in ppbar Collisions at 1.96 TeV
Dr
James Alexander Kraus
(Michigan State University (US))
05/07/2012, 12:00
Track 2 - Beyond the Standard Model - SUSY
Parallel Sessions
We present the first search for supersymmetry (SUSY) in Zgamma final states with large missing transverse energy using data corresponding to an integrated luminosity of 6.2 fb-1 collected with the D0 experiment in ppbar collisions at sqrt(s)=1.96 TeV. This signature is predicted in gauge-mediated SUSY-breaking models, where the lightest neutralino is the next-to-lightest supersymmetric...
Prof.
Mike Hildreth
(University of Notre Dame (US))
05/07/2012, 12:15
Track 2 - Beyond the Standard Model - SUSY
Parallel Sessions
We present results of searches for SUSY production at CMS in events with one or two isolated photons. The results are interpreted in terms of guage-mediation models, with the gravitino as the lightest supersymmetric particle.
Dr
Will Reece
(CERN (CH))
05/07/2012, 12:30
Track 2 - Beyond the Standard Model - SUSY
Parallel Sessions
The "razor" at the LHC refers to a set of kinematical variables used to discriminate heavy new physics against standard model processes. The empirical modeling of the variables and their correlation leads to good sensitivity to new physics. In this talk we present some of the latest results obtained with the razor technique in CMS, ranging from SUSY to more exotic searches.
Mr
Christopher Rogan
(California Institute of Technology (US))
05/07/2012, 14:00
Track 2 - Beyond the Standard Model - SUSY
Parallel Sessions
This talk we will present a compilation of all CMS new physics search results in the simplified model space and discuss the advantages and limitations of such interpretations.
Dr
Xavier Prudent
(Technische Universitรคt Dresden)
05/07/2012, 14:15
Track 2 - Beyond the Standard Model - SUSY
Parallel Sessions
We perform global fits to the parameters of the Constrained Minimal Supersymmetric Standard Model (CMSSM) and to a variant with non-universal Higgs masses (NUHM1). In addition to constraints from low-energy precision observables and the cosmological dark matter density, we take into account the LHC exclusions from searches in jets plus missing transverse energy signatures with about...
Dr
Albert De Roeck
(CERN (CH))
05/07/2012, 14:30
Track 2 - Beyond the Standard Model - SUSY
Parallel Sessions
We present the latest results of the MasterCode collaboration on global SUSY fits.
Currently available experimental data are used to determine the preferred SUSY and Higgs boson mass scales. The data comprise a combination of high-energy SUSY searches, low-energy precision measurements and astrophysical data. We include all relevant LHC searches for SUSY, electroweak precision observables...
Prof.
Dmitry Kazakov
(JINR (RU))
05/07/2012, 14:45
Track 2 - Beyond the Standard Model - SUSY
Parallel Sessions
The direct searches for Superymmetry can be complemented by direct searches for dark matter, if one assumes the Lightest Supersymmetric Particle (LSP) provides the dark matter of the universe. It is shown that within the CMSSM the direct searches are more sensitive than the direct LHC searches for large values of the squark masses, even if one considers the uncertainties from the local relic...
Dr
Nazila Mahmoudi
(CERN (CH) & Clermont Ferrand University (FR))
05/07/2012, 15:00
Track 2 - Beyond the Standard Model - SUSY
Parallel Sessions
The implications of a discovery, or a non-discovery, of the lightest Higgs boson will be discussed in terms of constrained and general MSSM scenarios. Exploring the MSSM through the Higgs sector is an alternative and complementary path to direct searches, and tight constraints on the parameter space can be obtained. Such constraints will be discussed in addition to, very briefly, the interplay...
Dr
Jong Soo Kim
(University of Adelaide (AU))
05/07/2012, 15:15
Track 2 - Beyond the Standard Model - SUSY
Parallel Sessions
We discuss the phenomenology of light scalar tops (stops) in the minimal supersymmetric standard model (MSSM). We analyse the discovery potential of stops in the co--annihilation regionย at the Large Hadron Collider (LHC).ย The bino-like neutralino is the lightest supersymmetric particle (LSP) and the lighter stop is the next-to-LSP. Such scenarios can be consistent with electroweak baryogenesis...
Mr
Tobias Kruker
(Universitรคt Bern (CH))
05/07/2012, 16:00
Track 2 - Beyond the Standard Model - SUSY
Parallel Sessions
Naturalness arguments for weak-scale supersymmetry favour supersymmetric partners of the Higgs and electroweak gauge bosons, so-called gauginos, with masses not too far from those of their Standard Model counterparts. Gauginos with masses less than a few hundred GeV can give rise to direct pair production rates at the LHC that can be observed in the data sample recorded in 2011 by the ATLAS...
Dr
Aoife Bharucha
(University of Hamburg (DE))
05/07/2012, 16:15
Track 2 - Beyond the Standard Model - SUSY
Parallel Sessions
Very precise measurements of masses and cross sections are expected to be achievable with a future linear collider. With such an accuracy one is even sensitive to quantum correction, which therefore must be incorporated in order to make meaningful predictions for the underlying new physics parameters. For the chargino--neutralino sector, this involves fitting one-loop predictions to expected...
Dr
Jenny List
(DESY (DE))
05/07/2012, 16:30
Track 2 - Beyond the Standard Model - SUSY
Parallel Sessions
We re-evaluate prospects for Supersymmetry at a future Electron Positron Linear Collider in light of the first 5 fb^-1 of data taken at LHC with $\sqrt{s}=7$ TeV proton proton collisions. Strong new limits from LHC SUSY searches, along with a hint of a Higgs boson signal around $m_h\sim 125$ GeV, suggest a paradigm shift from previously popular models to ones with new and compelling...
Dr
Taikan Suehara
(The University of Tokyo (JP))
05/07/2012, 16:45
Track 2 - Beyond the Standard Model - SUSY
Parallel Sessions
Proposed e+e- linear colliders a with center-of-mass energy from 250 GeV to 3 TeV (International Linear Collider, ILC and Compact Linear Collider, CLIC) are ideal tools for exploring supersymmetry, in addition to precision Higgs, top, W and Z physics and more generic searches for BSM phenomena. These machines cover a wide range of possible mass spectra of sparticles from 100 GeV to 1.5 TeV,...
Mr
Daniel Joseph Pomeroy
(Brandeis University (US))
05/07/2012, 17:00
Track 2 - Beyond the Standard Model - SUSY
Parallel Sessions
An extended QCD sector beyond the minimal supersymmetric standard model or the admission of R-parity violation introduces new signatures to the search for supersymmetry at the LHC. Strongly interacting resonances may decay to jets, sleptons may decay via lepton-flavour violating processes and lightest supersymmetric particles may decay into many leptons with or without missing transverse...
Dr
Gerhard Immanuel Brandt
(University of Oxford (UK))
05/07/2012, 17:15
Track 2 - Beyond the Standard Model - SUSY
Parallel Sessions
A search for squarks in Rยparity violating supersymmetry is performed in e^\pm p collisions at HERA using the H1 detector. The full data sample taken at a centre-ยofย-mass energy sqrt(s) = 319 GeV is used for the analysis, corresponding to an integrated luminosity of 255 pb^-1 of e+p and 183 pb^-1 of e^-p collision data. The resonant production of squarks via a Yukawa coupling lambda' is...
