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  • 1. Aarnio, A
    et al.
    Johansson, Sverker
    Högskolan för lärande och kommunikation, Högskolan i Jönköping, HLK, Ämnesforskning.
    Measurement of the mass and width of the Zo particle from multihadron final states produced in e+e--annihilations1989In: Physics Letters, no 231, p. p 539-Article in journal (Other academic)
  • 2. Aarnio, A
    et al.
    Johansson, Sverker
    Högskolan för lärande och kommunikation, Högskolan i Jönköping, HLK, Ämnesforskning.
    Study of the hadronic decays of the Zo boson1990In: Physics Letters, no 240, p. p 271-Article in journal (Other academic)
  • 3. Aarnio, A
    et al.
    Johansson, Sverker
    Högskolan för lärande och kommunikation, Högskolan i Jönköping, HLK, Ämnesforskning.
    Study of the leptonic decays of the Zo boson1990In: Physics Letters, no 241, p. p 425-Article in journal (Other academic)
  • 4.
    Johansson, Sverker
    Högskolan för lärande och kommunikation, Högskolan i Jönköping, HLK, Ämnesforskning.
    A study of mu-mu- and e-mu-pairs produced in 450 GeV/c p-Be--collisions in HELIOS, and software development for DELPHI.1990Doctoral thesis, monograph (Other academic)
    Abstract [en]

    The main part of this thesis treats measurements in the HELIOS experiment of the production of e-mu and mu+mu-pairs in 450 GeV/c p-Be collisions. The mumu measurement covers the kinematical covers the kinematical range of 2Mmu < M < 1.5 GeV, 0.03 < xF < 0.25, and 0 < pT < 2 GeV. Production of the vector mesons rho, omega , and phi is observed. The branching ratio omega to mu+mu- is for the first time experimentally measured. The continuum at masses below the mu mass is studied, and compared with the contributions from known sources, normalized to the vector meson peaks in the mu+mu- mass spectrum, and to measurements in this experiment of the mu cross section. The res ult is compared with that of other experiments, discussed in terms of different background estimates used. A significant signal of unlike-sign e-mu-pairs is observed, forming a continuum peaking at a mass below 500 MeV. Correlations between e-mu and neutrino production are studied. The shape of the e-mu mass and missng-energy spectra indicate significant non-charm contributions. A search for lepton-number-violating decays is made, resulting in upper limits on a number of branching ratios. Also discussed here is the author's work in the DELPHI experiment, contributions that are related to analysis of heavy quark production. Keywords: muon. pair, dimuon, dilepton, lepton, low mass, continuum, eta, rho, omega, branching ratio, emu, e-mu, mue, mu-e, muon-electron, electron-muon, electron, charm, neutrino, missing energy

  • 5.
    Johansson, Sverker
    Högskolan för lärande och kommunikation, Högskolan i Jönköping, HLK, Ämnesforskning.
    Cosmic rays and free neutrinos affect decay rates2005In: The Counter-Creationism handbook, Westport: Greenwood Publishing , 2005Chapter in book (Other (popular science, discussion, etc.))
  • 6.
    Johansson, Sverker
    Högskolan för lärande och kommunikation, Högskolan i Jönköping, HLK, Ämnesforskning.
    Dimuon production in 450 GeV/c p-Be collisions1990In: Proceedings of the Pittsburgh Workshop on Soft Lepton Pair and Photon Production, Sept 6-8, 1990, 1990Conference paper (Other academic)
  • 7.
    Johansson, Sverker
    Högskolan i Jönköping.
    The transverse energy distribution in 16O-nucleus collisions at 60 and 200 GeV per nucleon1988In: Zeitschrift für Physik C, Vol. 38, p. 383-395Article in journal (Refereed)
  • 8.
    Johansson, Sverker
    Högskolan för lärande och kommunikation, Högskolan i Jönköping, HLK, Ämnesforskning.
    Transverse energy distribution in 16O -nucleus collisions1987In: 6th International conference on ultra-relativistic nucleus-nucleus collisions: Nordkirchen, FR Germany, 24 - 28 Aug 1987, 1987, p. 15-18Conference paper (Other academic)
  • 9.
    Johansson, Sverker
    Högskolan för lärande och kommunikation, Högskolan i Jönköping, HLK, Ämnesforskning.
    Transverse energy distribution in 16O -nucleus collisions1988In: Zeitschrift für Physik C, no 38, p. 15-18Article in journal (Other academic)
  • 10. Åkesson, Torsten
    et al.
    Johansson, Sverker
    Högskolan för lärande och kommunikation, Högskolan i Jönköping, HLK, Ämnesforskning.
    A search for multiplicity fluctuations in high energy nucleus-nucleus collisions1990In: Physics Letters, no 252, p. p 303-Article in journal (Other academic)
  • 11. Åkesson, Torsten
    et al.
    Johansson, Sverker
    Högskolan för lärande och kommunikation, Högskolan i Jönköping, HLK, Ämnesforskning.
    A search for weakly interacting neutral particles in missing energy events in 450 GeV/c pN collisions1991In: Zeitschrift für Physik, no 52, p. p 219-Article in journal (Other academic)
  • 12. Åkesson, Torsten
    et al.
    Johansson, Sverker
    Högskolan för lärande och kommunikation, Högskolan i Jönköping, HLK, Ämnesforskning.
    A study of electron-muon pair production in 450 GeV/c pBe collisions1996In: Zeitschrift für Physik, no 72, p. p 429-Article in journal (Other academic)
  • 13. Åkesson, Torsten
    et al.
    Johansson, Sverker
    Dalarna University, Not School affiliated. Högskolan för lärande och kommunikation, Högskolan i Jönköping, HLK, Ämnesforskning.
    An emulsion study of 16O and 32S interactions at 200 GeV per nucleon selected by transverse energy1990In: Nuclear Physics, no 342, p. 279-301Article in journal (Other academic)
  • 14. Åkesson, Torsten
    et al.
    Johansson, Sverker
    Högskolan för lärande och kommunikation, Högskolan i Jönköping, HLK, Ämnesforskning.
    Charged-particle multiplicity distributions in oxygen-nucleus collisions at 60 and 200 GeV per nucleon1990In: Nuclear Physics, no 333, p. 48-65Article in journal (Other academic)
  • 15. Åkesson, Torsten
    et al.
    Johansson, Sverker
    Högskolan för lärande och kommunikation, Högskolan i Jönköping, HLK, Ämnesforskning.
    Diffraction dissociation of nuclei in 450 GeV/c proton-nucleus collisions1991In: Zeitschrift für Physik, no 49, p. p 355-Article in journal (Other academic)
  • 16. Åkesson, Torsten
    et al.
    Johansson, Sverker
    Högskolan för lärande och kommunikation, Högskolan i Jönköping, HLK, Ämnesforskning.
    Inclusive negative particle p^ spectra in p-nucleus and nucleus-nucleus collisions at 200 GeV per nucleon1990In: Zeitschrift für Physik, no 46, p. 361-367Article in journal (Other academic)
  • 17. Åkesson, Torsten
    et al.
    Johansson, Sverker
    Högskolan för lärande och kommunikation, Högskolan i Jönköping, HLK, Ämnesforskning.
    Inclusive photon production in pA and AA collisions at 200 GeV/u1990In: Zeitschrift für Physik, no 46, p. 369-375Article in journal (Other academic)
  • 18. Åkesson, Torsten
    et al.
    Johansson, Sverker
    Högskolan för lärande och kommunikation, Högskolan i Jönköping, HLK, Ämnesforskning.
    Kaon production in 200 GeV/nucleon nucleus-nucleus collisions1992In: Physics Letters, no 296, p. p 273-Article in journal (Other academic)
  • 19. Åkesson, Torsten
    et al.
    Johansson, Sverker
    Högskolan för lärande och kommunikation, Högskolan i Jönköping, HLK, Ämnesforskning.
    Low-mass lepton-pair production in p-Be collisions at 450 GeV/c1995In: Zeitschrift für Physik, no 68, p. p 43-Article in journal (Other academic)
  • 20. Åkesson, Torsten
    et al.
    Johansson, Sverker
    Högskolan för lärande och kommunikation, Högskolan i Jönköping, HLK, Ämnesforskning.
    Measurement of the transverse energy flow in nucleus-nucleus collisions at 200 GeV per nucleon1991In: Nuclear Physics, no 353, p. p 1-Article in journal (Other academic)
  • 21. Åkesson, Torsten
    et al.
    Johansson, Sverker
    Högskolan för lärande och kommunikation, Högskolan i Jönköping, HLK, Ämnesforskning.
    Proton distributions in the target fragmentation region in proton-nucleus and nucleus-nucleus collisions at high energies1992In: Zeitschrift für Physik, no 53, p. p 183-Article in journal (Other academic)
  • 22. Åkesson, Torsten
    et al.
    Johansson, Sverker
    Högskolan för lärande och kommunikation, Högskolan i Jönköping, HLK, Ämnesforskning.
    The transverse energy distribution of 32S -nucleus collisions at 200 GeV per nucleon1988In: Physics Letters, no 214, p. 295-302Article in journal (Other academic)
  • 23. Åkesson, Torsten
    et al.
    Johansson, Sverker
    Högskolan för lärande och kommunikation, Högskolan i Jönköping, HLK, Ämnesforskning.
    Transverse energy measurements in proton-nucleus interactions at high energy1993In: Zeitschrift für Physik C Particles and Fields, ISSN 0170-9739, E-ISSN 1431-5858, Vol. 58, no 2, p. 239-249Article in journal (Other academic)
1 - 23 of 23
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