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Träfflista för sökning "LAR1:lu ;lar1:(kth);pers:(Öhman Henrik)"

Search: LAR1:lu > Royal Institute of Technology > Öhman Henrik

  • Result 1-10 of 383
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1.
  • Aaboud, M, et al. (author)
  • Search for a Structure in the Bs0 π± Invariant Mass Spectrum with the ATLAS Experiment
  • 2018
  • In: Physical Review Letters. - : AMER PHYSICAL SOC. - 1079-7114 .- 0031-9007. ; 120:20
  • Journal article (peer-reviewed)abstract
    • A search for the narrow structure, X(5568), reported by the D0 Collaboration in the decay sequence X→Bs0π±, Bs0→J/ψφ, is presented. The analysis is based on a data sample recorded with the ATLAS detector at the LHC corresponding to 4.9 fb-1 of pp collisions at 7 TeV and 19.5 fb-1 at 8 TeV. No significant signal was found. Upper limits on the number of signal events, with properties corresponding to those reported by D0, and on the X production rate relative to Bs0 mesons, ρX, were determined at 95% confidence level. The results are N(X)
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  • Aad, G, et al. (author)
  • Beam-induced and cosmic-ray backgrounds observed in the ATLAS detector during the LHC 2012 proton-proton running period
  • 2016
  • In: Journal of Instrumentation. - : IOP PUBLISHING LTD. - 1748-0221. ; 11:5
  • Journal article (peer-reviewed)abstract
    • This paper discusses various observations on beam-induced and cosmic-ray backgrounds in the ATLAS detector during the LHC 2012 proton-proton run. Building on published results based on 2011 data, the correlations between background and residual pressure of the beam vacuum are revisited. Ghost charge evolution over 2012 and its role for backgrounds are evaluated. New methods to monitor ghost charge with beam-gas rates are presented and observations of LHC abort gap population by ghost charge are discussed in detail. Fake jets from colliding bunches and from ghost charge are analysed with improved methods, showing that ghost charge in individual radio-frequency buckets of the LHC can be resolved. Some results of two short periods of dedicated cosmic-ray background data-taking are shown; in particular cosmic-ray muon induced fake jet rates are compared to Monte Carlo simulations and to the fake jet rates from beam background. A thorough analysis of a particular LHC fill, where abnormally high background was observed, is presented. Correlations between backgrounds and beam intensity losses in special fills with very high β∗ are studied. © 2016 CERN for the benefit of the ATLAS collaboration.
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  • Aad, G, et al. (author)
  • Constraints on non-Standard Model Higgs boson interactions in an effective Lagrangian using differential cross sections measured in the H → γγ decay channel at √s=8 TeV with the ATLAS detector
  • 2016
  • In: Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics. - : Elsevier BV. - 0370-2693 .- 1873-2445. ; 753, s. 69-85
  • Journal article (peer-reviewed)abstract
    • The strength and tensor structure of the Higgs boson's interactions are investigated using an effective Lagrangian, which introduces additional CP-even and CP-odd interactions that lead to changes in the kinematic properties of the Higgs boson and associated jet spectra with respect to the Standard Model. The parameters of the effective Lagrangian are probed using a fit to five differential cross sections previously measured by the ATLAS experiment in the H→γγ decay channel with an integrated luminosity of 20.3 fb−1 at s=8 TeV. In order to perform a simultaneous fit to the five distributions, the statistical correlations between them are determined by re-analysing the H→γγ candidate events in the proton–proton collision data. No significant deviations from the Standard Model predictions are observed and limits on the effective Lagrangian parameters are derived. The statistical correlations are made publicly available to allow for future analysis of theories with non-Standard Model interactions. © 2015 CERN for the benefit of the ATLAS Collaboration.
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  • Result 1-10 of 383
Type of publication
journal article (383)
Type of content
peer-reviewed (383)
Author/Editor
Öhman, Henrik (383)Undo refine
Ekelöf, Tord (382)
Zwalinski, L. (378)
Ellert, Mattias (376)
Brenner, Richard (375)
Silverstein, Samuel ... (372)
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Bohm, Christian (369)
Strandberg, Jonas (366)
Abdinov, O (343)
Abbott, B. (341)
Aad, G (340)
Lund-Jensen, Bengt (340)
Doglioni, Caterina (333)
Ferrari, Arnaud (307)
Moa, Torbjörn (300)
Hellman, Sten (295)
Jon-And, Kerstin (285)
Abdallah, J (281)
Cribbs, Wayne A. (257)
Abulaiti, Yiming (252)
Ughetto, Michaël (252)
Madsen, Alexander (249)
Sjölin, Jörgen (249)
Bertoli, Gabriele (244)
Molander, Simon (242)
Pöttgen, Ruth (238)
Lundberg, Olof (235)
Clement, Christophe (234)
Pelikan, Daniel (230)
Lytken, Else (229)
Milstead, David A. (229)
Bessidskaia Bylund, ... (229)
Smirnova, Oxana (226)
Rangel-Smith, Camill ... (226)
Mjörnmark, Ulf (223)
Åkesson, Torsten (222)
Hedberg, Vincent (222)
Jarlskog, Göran (222)
Bocchetta, Simona (221)
Åkerstedt, Henrik (220)
Viazlo, Oleksandr (218)
Aben, R. (214)
Strandberg, Sara (208)
Isaksson, Charlie (204)
Shaikh, Nabila W. (191)
Wallängen, Veronica (191)
Bendtz, Katarina (191)
Åsman, Barbro (187)
Maddocks, H. J. (177)
Rossetti, Valerio (177)
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University
Royal Institute of Technology  (383)Undo refine
Uppsala University (383)
Lund University (383)
Stockholm University (377)
Language
English (383)
Research subject (UKÄ/SCB)
Natural sciences (383)
Engineering and Technology (2)

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