M. Johansen
Stockholm University
Network
Latest external collaboration on country level. Dive into details by clicking on the dots.
Publication
Featured researches published by M. Johansen.
Journal of Instrumentation | 2008
R. Achenbach; P. Adragna; V. Andrei; P Apostologlou; B. Åsman; C. Ay; B. M. Barnett; B. Bauss; M. Bendel; C. Bohm; J.R.A. Booth; I.P. Brawn; P Bright Thomas; D. G. Charlton; N. J. Collins; C. J. Curtis; A. Dahlhoff; A.O. Davis; S. Eckweiler; J. Edwards; E. Eisenhandler; P.J.W. Faulkner; J. Fleckner; F. Föhlisch; J. Garvey; C. N. P. Gee; A. R. Gillman; P Hanke; R P Hatley; S. Hellman
The ATLAS Level-1 Calorimeter Trigger uses reduced-granularity information from all the ATLAS calorimeters to search for high transverse-energy electrons, photons, τ leptons and jets, as well as high missing and total transverse energy. The calorimeter trigger electronics has a fixed latency of about 1 μs, using programmable custom-built digital electronics. This paper describes the Calorimeter Trigger hardware, as installed in the ATLAS electronics cavern.
Journal of High Energy Physics | 2010
B. Åsman; Christian Bohm; C. Clement; D. Eriksson; K. Gellerstedt; S. Hellman; A. Hidvegi; S. O. Holmgren; M. Johansen; E. K. Johansson; K. Jon-And; J. Lesser; David Milstead; T. Moa; Björn Nordkvist; C. C. Ohm; M. Ramstedt; B. Sellden; Samuel Silverstein; J. Sjölin; S. Strandberg; M. Tylmad; Zhaoyu Yang
First measurements of the W → ℓν and Z/γ*→ ℓℓ (ℓ = e, μ) production cross sections in proton-proton collisions at
Journal of High Energy Physics | 2010
M. Johansen; Jokaim Edsjö; S. Hellman; David Milstead
\sqrt {s} = 7\;{\text{TeV}}
ieee nuclear science symposium | 2008
R. Achenbach; P. Adragna; M. Aharrouche; V. Andrei; B. Åsman; B. M. Barnett; B. Bauss; M. Bendel; C. Bohm; J.R.A. Booth; J. Bracinik; I.P. Brawn; D. G. Charlton; J. T. Childers; N. J. Collins; C. J. Curtis; A.O. Davis; S. Eckweiler; E. Eisenhandler; P.J.W. Faulkner; J. Fleckner; F. Föhlisch; C. N. P. Gee; A. R. Gillman; C. Goringer; M. Groll; D. R. Hadley; P. Hanke; S. Hellman; A. Hidvegi
are presented using data recorded by the ATLAS experiment at the LHC. The results are based on 2250 W → ℓν and 179 Z/γ* → ℓℓ candidate events selected from a data set corresponding to an integrated luminosity of approximately 320 nb. The measured total W and Z/γ∗-boson production cross sections times the respective leptonic branching ratios for the combined electron and muon channels are
IEEE Transactions on Nuclear Science | 2008
R. Achenbach; P. Adragna; V. Andrei; B. M. Barnett; B. Bauss; M. Bendel; C. Bohm; J.R.A. Booth; I.P. Brawn; D. G. Charlton; C. J. Curtis; A.O. Davis; E. Eisenhandler; P.J.W. Faulkner; F. Föhlisch; C. N. P. Gee; C. Geweniger; A. R. Gillman; P. Hanke; S. Hellman; A. Hidvegi; S. J. Hillier; M. Johansen; E.-E. Kluge; Murrough Landon; V. Lendermann; K. Mahboubi; G. Mahout; K. Meier; A. Neusiedl
\sigma_W^{\text{tot}}
Physical Review Letters | 2011
B. Åsman; Christian Bohm; C. Clement; D. Eriksson; K. Gellerstedt; S. Hellman; A. Hidvegi; M. Johansen; E. K. Johansson; K. Jon-And; J. Lesser; Johan Lundberg; David Milstead; T. Moa; Björn Nordkvist; C. C. Ohm; A. Papadelis; M. Ramstedt; B. Sellden; Samuel Silverstein; J. Sjölin; S. Strandberg; M. Tylmad; Zhaoyu Yang; S. O. Holmgren
. BR(W → ℓν) = 9.96 ± 0.23(stat) ± 0.50(syst) ± 1.10(lumi) nb and
Prepared for | 2008
D. Prieur; E.-E. Kluge; C. C. Ohm; M. C. Stockton; S. B. Silverstein; Murrough Landon; T. Kuehl; D. G. Charlton; Uli Schaefer; E. Eisenhandler; A. Hidvegi; C. Boehm; K. Schmitt; A. T. Watson; J. T. Childers; N. J. Collins; P. Adragna; Joergen Sjoelin; F. Föhlisch; U. Schäfer; M. Wessels; C.L.A. Tan; M. A. Wildt; J. Sjölin; F. Foehlisch; K. Meier; M. Groll; C. J. Curtis; P. D. Thompson; F. Mueller
\sigma_{{{Z} \left/ {\gamma } \right.}}^{\text{tot}}
ieee-npss real-time conference | 2007
R. Achenbach; P. Adragna; V. Andrei; B.M. Barnett; B. Bauss; M. Bendel; C. Bohm; J.R.A. Booth; L.P. Brawn; D. G. Charlton; C.J. Curtis; A.O. Davis; E. Eisenhandler; P.J.W. Faulkner; F. Föhlisch; C. N. P. Gee; C. Geweniger; A.R. Gillman; P. Hanke; S. Hellman; A. Hidvegi; S. J. Hillier; M. Johansen; E.-E. Kluge; Murrough Landon; V. Lendermann; K. Mahboubi; G. Mahout; K. Meier; V.J.O. Perera
BR(Z/γ∗ → ℓℓ) = 0.82 ± 0.06 (stat) ± 0.05 (syst) ± 0.09(lumi) nb (within the invariant mass window 66 < mℓℓ< 116GeV). The W/Z cross-section ratio is measured to be 11.7 ± 0.9(stat) ± 0.4(syst). In addition, measurements of the W+ and W− production cross sections and of the lepton charge asymmetry are reported. Theoretical predictions based on NNLO QCD calculations are found to agree with the measurements.First measurements of the W ->lnu and Z/gamma* ->ll (l = e, mu) production cross sections in proton-proton collisions at sqrt(s) = 7 TeV are presented using data recorded by the ATLAS experiment at the LHC. The results are based on 2250 W ->lnu and 179 Z/gamma* ->ll candidate events selected from a data set corresponding to an integrated luminosity of approximately 320 nb-1. The measured total W and Z/gamma*-boson production cross sections times the respective leptonic branching ratios for the combined electron and muon channels are
Archive | 2007
R Achenbach; U. Schäfer; D. Prieur; D. G. Charlton; C. N. P. Gee; I.P. Brawn; A. Neusiedl; E-E Woehrling; S. Hellman; J. N. Lilley; S. Tapprogge; P. Hanke; Hans-Christian Schultz-Coulon; E-E Kluge; W. Qian; R. Staley; J. Fleckner; A. R. Gillman; P. M. Watkins; Murrough Landon; K. Schmitt; E. Eisenhandler; P. Weber; M. C. Stockton; F. Föhlisch; Andrei; T. Trefzger; P.J.W. Faulkner; C. Bohm; S. B. Silverstein
\stotW
Acta Physica Polonica B | 2007
M. Johansen
* BR(W ->lnu) = 9.96 +- 0.23(stat) +- 0.50(syst) +- 1.10(lumi) nb and
