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Träfflista för sökning "hsv:(NATURVETENSKAP) hsv:(Fysik) srt2:(1965-1979)"

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1.
  • Andersson, B., et al. (författare)
  • The relationship between the meson, baryon, photon and quark fragmentation distributions
  • 1977
  • Ingår i: Physics Letters B. - : Elsevier BV. - 0370-2693. ; 69:2, s. 221-224
  • Tidskriftsartikel (refereegranskat)abstract
    • The ideas presented in an earlier note on the relationship between the quark fragmentation distributions as measured in leptoproduction and the one particle distributions in the mesonic fragmentation regions of hadronic interactions are carried further to photoproduction and to the baryon fragmentation distributions. The results are as before interpreted in terms of a simple additive quark model where the main interaction is due to the wee partons whereas almost all the initial momentum is carried by one of the valence quarks or a diquark.
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6.
  • Malmhäll, Roger, et al. (författare)
  • Hall effect in Metglas 2826A and 2826 - dependence on temperature and pressure
  • 1977
  • Ingår i: Proceedings of International Conference on Magnetism, ICM 76. - : Elsevier. - 072040732X - 9780720407327 ; 86-88, s. 796-798
  • Konferensbidrag (refereegranskat)abstract
    • The Hall resistivity, ρH, of Metglas 2826A is measured for 0.6 ≤ T/Tc ≤ 1.9. Below To (∼255 K), the extraordinary Hall coefficient R1 is constant at +4.24 x x10-8 m3/As. The magnetic susceptibility, derived from our data, exhibits a Curie-Weiss behaviour above 350 K and varies as (T - Tc)-1.75 for (T - Tc) < 90 K. In 2826 at 300 K ρH drops linearly with increasing pressure.
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8.
  • Andersson, B., et al. (författare)
  • A statistical model for quark fragmentation into mesons with emphasis on vector meson contributions
  • 1978
  • Ingår i: Nuclear Physics, Section B. - : Elsevier BV. - 0550-3213. ; 135:2, s. 273-284
  • Tidskriftsartikel (refereegranskat)abstract
    • This paper is the first part of a program to deal with the relative importance of the different effects in a colour dipole field when the field energy is transformed into hadrons according to a statistical scheme with the sole constraints coming from energy and momentum conservation and the requirements of scaling. In this paper we treat the meson distributions from quark fragmentation with particular emphasis on the importance of a vector meson production of the size observed at present. We neglect diquark formation and the baryon distributions as a first approximation. The simplicity of the approach will make it possible to easily understand the size and the shape of the different contributions.
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9.
  • Andersson, Bo, et al. (författare)
  • Implications of a large vector meson production on quark jet fragmentation and large p T reactions
  • 1978
  • Ingår i: Physica Scripta. - : IOP Publishing. - 0031-8949 .- 1402-4896. ; 18:4, s. 193-195
  • Tidskriftsartikel (refereegranskat)abstract
    • A large vector meson production in quark jet fragmentation implies characteristic differences between the kaon and pion spectra. This prediction is verified in a recent SLAC-MIT experiment. Similar considerations are relevant for the c-quark fragmentation into D-mesons, as observed in ν scattering experiments.The difference in kaon and pion spectra provides a test of the hard quark-quark scattering description of large p T events. In particular the K+/π+ ratio (∼ 1/2 for single particle triggers) should be around 0.1-0.2 for jet triggers.
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10.
  • Gustafson, Gösta, et al. (författare)
  • Rescattering effects in the decay of the A1
  • 1976
  • Ingår i: Nuclear Physics, Section B. - : Elsevier BV. - 0550-3213. ; 116:2, s. 301-316
  • Tidskriftsartikel (refereegranskat)abstract
    • Rescattering effects in the 3π system in the A1 region are studied with a method, which fulfils unitarity and has the proper analytic structure. Fairly small effects are obtained which confirm the result found in amplitude analyses, neglecting rescattering corrections, that the phases of the JP = 1+ amplitudes vary only very little over the A1 region. Similar results hold for the Q enhancement.
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