The Experts below are selected from a list of 225 Experts worldwide ranked by ideXlab platform
G. Aad - One of the best experts on this subject based on the ideXlab platform.
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Search for resonant WZ production in the WZ to l nu l' l' channel in sqrt(s) = 7 TeV pp collisions with the ATLAS detector
Physical Review D, 2012Co-Authors: G. Aad, S. Albrand, M.l. Andrieux, B. Clement, J. Collot, S. Crépé-renaudin, Q. Buat, B. Dechenaux, T. Delemontex, P.a. DelsartAbstract:A generic search is presented for a Heavy Particle decaying to WZ to l nu l'l' (l, l' = e, mu) final states. The data were recorded by the ATLAS detector in sqrt(s) = 7 TeV pp collisions at the Large Hadron Collider and correspond to an integrated luminosity of 1.02 fb-1. The transverse mass distribution of the selected WZ candidates is found to be consistent with the Standard Model expectation. Upper limits on the production cross section times branching ratio are derived using two benchmark models predicting a Heavy Particle decaying to a WZ pair.
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search for a Heavy Particle decaying into an electron and a muon with the atlas detector in root s 7 tev pp collisions at the lhc
Physical Review Letters, 2011Co-Authors: G. Aad, B Abbott, J Abdallah, A A Abdelalim, A Abdesselam, O Abdinov, B Abi, M Abolins, H AbramowiczAbstract:This Letter presents the first search for a Heavy Particle decaying into an e(+/-)mu(-/+) final state in root s = 7 TeV pp collisions at the LHC. The data were recorded by the ATLAS detector during 2010 and correspond to a total integrated luminosity of 35 pb(-1). No excess above the standard model background expectation is observed. Exclusions at 95% confidence level are placed on two representative models. In an R-parity violating supersymmetric model, tau sneutrinos with a mass below 0.75 TeV are excluded, assuming all R-parity violating couplings are zero except lambda(311)' = 0.11 and lambda(312) = 0.07. In a lepton flavor violating model, a Z'-like vector boson with masses of 0.70-1.00 TeV and corresponding cross sections times branching ratios of 0.175-0.183 pb is excluded. These results extend to higher mass R-parity violating sneutrinos and lepton flavor violating Z's than previous constraints from the Tevatron.
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Search for a Heavy Particle decaying into an electron and a muon with the ATLAS detector in sqrt(s) = 7 TeV pp collisions at the LHC
Physical Review Letters, 2011Co-Authors: G. Aad, S. Albrand, M.l. Andrieux, B. Clement, J. Collot, S. Crépé-renaudin, P. De Saintignon, P.a. Delsart, J. Donini, D. DzahiniAbstract:This Letter presents the first search for a Heavy Particle decaying into an e\mu final state in sqrt(s)=7 TeV pp collisions at the LHC. The data were recorded by the ATLAS detector during 2010 and correspond to a total integrated luminosity of 35/pb. No excess above the Standard Model background expectation is observed. Exclusions at 95% confidence level are placed on two representative models. In an R-parity violating supersymmetric model, tau sneutrinos with a mass below 0.75 TeV are excluded, assuming single coupling dominance and the couplings lambda'_{311}=0.11, lambda_{312}=0.07. In a lepton flavor violating model, a Z'-like vector boson with masses of 0.70 to 1.00 TeV and corresponding cross sections times branching ratios of 0.175 to 0.183 pb is excluded. These results extend to higher mass RPV sneutrinos and LFV Z's than previous constraints from the Tevatron.
P.a. Delsart - One of the best experts on this subject based on the ideXlab platform.
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Search for resonant WZ production in the WZ to l nu l' l' channel in sqrt(s) = 7 TeV pp collisions with the ATLAS detector
Physical Review D, 2012Co-Authors: G. Aad, S. Albrand, M.l. Andrieux, B. Clement, J. Collot, S. Crépé-renaudin, Q. Buat, B. Dechenaux, T. Delemontex, P.a. DelsartAbstract:A generic search is presented for a Heavy Particle decaying to WZ to l nu l'l' (l, l' = e, mu) final states. The data were recorded by the ATLAS detector in sqrt(s) = 7 TeV pp collisions at the Large Hadron Collider and correspond to an integrated luminosity of 1.02 fb-1. The transverse mass distribution of the selected WZ candidates is found to be consistent with the Standard Model expectation. Upper limits on the production cross section times branching ratio are derived using two benchmark models predicting a Heavy Particle decaying to a WZ pair.
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Search for a Heavy Particle decaying into an electron and a muon with the ATLAS detector in sqrt(s) = 7 TeV pp collisions at the LHC
Physical Review Letters, 2011Co-Authors: G. Aad, S. Albrand, M.l. Andrieux, B. Clement, J. Collot, S. Crépé-renaudin, P. De Saintignon, P.a. Delsart, J. Donini, D. DzahiniAbstract:This Letter presents the first search for a Heavy Particle decaying into an e\mu final state in sqrt(s)=7 TeV pp collisions at the LHC. The data were recorded by the ATLAS detector during 2010 and correspond to a total integrated luminosity of 35/pb. No excess above the Standard Model background expectation is observed. Exclusions at 95% confidence level are placed on two representative models. In an R-parity violating supersymmetric model, tau sneutrinos with a mass below 0.75 TeV are excluded, assuming single coupling dominance and the couplings lambda'_{311}=0.11, lambda_{312}=0.07. In a lepton flavor violating model, a Z'-like vector boson with masses of 0.70 to 1.00 TeV and corresponding cross sections times branching ratios of 0.175 to 0.183 pb is excluded. These results extend to higher mass RPV sneutrinos and LFV Z's than previous constraints from the Tevatron.
Jonatha R Walsh - One of the best experts on this subject based on the ideXlab platform.
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recombination algorithms and jet substructure pruning as a tool for Heavy Particle searches
Physical Review D, 2010Co-Authors: S D Ellis, Christophe K Vermilio, Jonatha R WalshAbstract:We discuss jet substructure in recombination algorithms for QCD jets and single jets from Heavy Particle decays. We demonstrate that the jet algorithm can introduce significant systematic effects into the substructure. By characterizing these systematic effects and the substructure from QCD, splash-in, and Heavy Particle decays, we identify a technique, pruning, to better identify Heavy Particle decays into single jets and distinguish them from QCD jets. Pruning removes protojets typical of soft, wide-angle radiation, improves the mass resolution of jets reconstructing Heavy Particle decays, and decreases the QCD background to these decays. We show that pruning provides significant improvements over unpruned jets in identifying top quarks and $W$ bosons and separating them from a QCD background, and may be useful in a search for Heavy Particles.
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techniques for improved Heavy Particle searches with jet substructure
Physical Review D, 2009Co-Authors: S D Ellis, Christophe K Vermilio, Jonatha R WalshAbstract:We present a generic method for improving the effectiveness of Heavy Particle searches in hadronic channels at the Large Hadron Collider. By selectively removing, or pruning, protojets from the substructure provided by a k{sub T}-type jet algorithm, we improve the mass resolution for Heavy decays and decrease the QCD background. We show that the protojets removed are typical of soft radiation and underlying event contributions, and atypical of accurately reconstructed Heavy Particles.
Andrée Tuzet - One of the best experts on this subject based on the ideXlab platform.
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Observations and Modeling of Heavy Particle Deposition in a Windbreak Flow
Journal of Applied Meteorology and Climatology, 2006Co-Authors: T. Bouvet, John D. Wilson, Andrée TuzetAbstract:Abstract This paper presents new observations of deposition of Heavy Particles (glass beads of gravitational settling velocity 8.7 cm s−1) within an undisturbed flow and within a flow disturbed by a porous windbreak fence. These data are then used to diagnose the capability of a Lagrangian stochastic (LS) Particle trajectory model, which simulates Heavy Particle dispersion. The model is based on existing parameterizations and is coupled to a wind model based on a Reynolds stress turbulence closure that provides computed fields of wind statistics. The deposition rates, as simulated by the model, match the observation within E = 30% of accuracy, with E being the root-mean-square error normalized by the peak value on the deposition swath. These results suggest that the LS model handles properly the heterogeneities of the flow and that the heuristic adjustments made to account for the inertia of Heavy Particles are useful approximations. The model consequently proves to be a valuable tool to investigate the p...
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Observations and modeling of Heavy Particle deposition in a windbreak flow
Journal of Applied Meteorology and Climatology, 2006Co-Authors: T. Bouvet, John D. Wilson, Andrée TuzetAbstract:This paper presents new observations of deposition of Heavy Particles ( glass beads of gravitational settling velocity 8.7 cm s(-1)) within an undisturbed flow and within a flow disturbed by a porous windbreak fence. These data are then used to diagnose the capability of a Lagrangian stochastic (LS) Particle trajectory model, which simulates Heavy Particle dispersion. The model is based on existing parameterizations and is coupled to a wind model based on a Reynolds stress turbulence closure that provides computed fields of wind statistics. The deposition rates, as simulated by the model, match the observation within E = 30% of accuracy, with E being the root-mean-square error normalized by the peak value on the deposition swath. These results suggest that the LS model handles properly the heterogeneities of the flow and that the heuristic adjustments made to account for the inertia of Heavy Particles are useful approximations. The model consequently proves to be a valuable tool to investigate the patterns of dispersion about an obstacle.
M.l. Andrieux - One of the best experts on this subject based on the ideXlab platform.
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Search for resonant WZ production in the WZ to l nu l' l' channel in sqrt(s) = 7 TeV pp collisions with the ATLAS detector
Physical Review D, 2012Co-Authors: G. Aad, S. Albrand, M.l. Andrieux, B. Clement, J. Collot, S. Crépé-renaudin, Q. Buat, B. Dechenaux, T. Delemontex, P.a. DelsartAbstract:A generic search is presented for a Heavy Particle decaying to WZ to l nu l'l' (l, l' = e, mu) final states. The data were recorded by the ATLAS detector in sqrt(s) = 7 TeV pp collisions at the Large Hadron Collider and correspond to an integrated luminosity of 1.02 fb-1. The transverse mass distribution of the selected WZ candidates is found to be consistent with the Standard Model expectation. Upper limits on the production cross section times branching ratio are derived using two benchmark models predicting a Heavy Particle decaying to a WZ pair.
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Search for a Heavy Particle decaying into an electron and a muon with the ATLAS detector in sqrt(s) = 7 TeV pp collisions at the LHC
Physical Review Letters, 2011Co-Authors: G. Aad, S. Albrand, M.l. Andrieux, B. Clement, J. Collot, S. Crépé-renaudin, P. De Saintignon, P.a. Delsart, J. Donini, D. DzahiniAbstract:This Letter presents the first search for a Heavy Particle decaying into an e\mu final state in sqrt(s)=7 TeV pp collisions at the LHC. The data were recorded by the ATLAS detector during 2010 and correspond to a total integrated luminosity of 35/pb. No excess above the Standard Model background expectation is observed. Exclusions at 95% confidence level are placed on two representative models. In an R-parity violating supersymmetric model, tau sneutrinos with a mass below 0.75 TeV are excluded, assuming single coupling dominance and the couplings lambda'_{311}=0.11, lambda_{312}=0.07. In a lepton flavor violating model, a Z'-like vector boson with masses of 0.70 to 1.00 TeV and corresponding cross sections times branching ratios of 0.175 to 0.183 pb is excluded. These results extend to higher mass RPV sneutrinos and LFV Z's than previous constraints from the Tevatron.