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1.
  • Abreu, P, et al. (författare)
  • b-tagging in DELPHI at LEP
  • 2004
  • Ingår i: European Physical Journal C. Particles and Fields. - : Springer Science and Business Media LLC. - 1434-6044. ; 32:2, s. 185-208
  • Tidskriftsartikel (refereegranskat)abstract
    • The standard method used for tagging b-hadrons in the DELPHI experiment at the CERN LEP Collider is discussed in detail. The main ingredient of b-tagging is the impact parameters of tracks, which relies mostly on the vertex detector. Additional information, such as the mass of particles associated to a secondary vertex, significantly improves the selection efficiency and the background suppression. The paper describes various discriminating variables used for the tagging and the procedure of their combination. In addition, applications of b-tagging to some physics analyses, which depend crucially on the performance and reliability of b-tagging, are described briefly.
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2.
  • Jiemchooroj, Auayporn, et al. (författare)
  • C6 dipole-dipole dispersion coefficients for the n-alkanes : Test of an additivity procedure
  • 2004
  • Ingår i: Physical Review A. Atomic, Molecular, and Optical Physics. - : American Physical Society. - 1050-2947 .- 1094-1622. ; 69:4, s. 044701-1
  • Tidskriftsartikel (refereegranskat)abstract
    • The dipole-dipole dispersion coefficients for pairs of n-alkane molecules with six or less carbon atoms were studied. The calculations were based on the dynamic polarizabilities of the molecules on the imaginary frequency axis. The dynamic polarizabilities in turn were obtained from Kohn-Sham density-functional theory polarization propagator calculations using the hybrid B3LYP exchange-correlation functional. The results for the static polarizabilities of each molecule were decomposed into bond polarizabilities and values for the polarizabilities of the C-H and C-C bonds.
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  • Resultat 1-4 av 4

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