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  • 1995-1999  (2)
  • 1
    Electronic Resource
    Electronic Resource
    Case studies of the propagation characteristics of auroral TIDS with EISCAT CP2 data using maximum entropy cross-spectral analysis (1998)
    Springer
    Annales geophysicae 16 (1998), S. 161-167 
    Details
    ISSN: 0992-7689
    Keywords: Ionosphere ; auroral ionosphere ; Ionosphere-atmosphere interactions ; wave propagation)
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract In this paper case studies of propagation characteristics of two TIDs are presented which are induced by atmospheric gravity waves in the auroral F-region on a magnetic quiet day. By means of maximum entropy cross-spectral analysis of EISCAT CP2 data, apparent full wave-number vectors of the TIDs are obtained as a function of height. The analysis results show that the two events considered can be classified as moderately large-scale TID and medium-scale TID, respectively. One exhibits a dominant period of about 72 min, a mean horizontal phase speed of about 180 m/s (corresponding to a horizontal wavelength of about 780 km) directed south-eastwards and a vertical phase speed of 55 m/s for a height of about 300 km. The other example shows a dominant period of 44 min, a mean horizontal phase velocity of about 160 m/s (corresponding to a horizontal wavelength of about 420 km) directed southwestwards, and a vertical phase velocity of about 50 m/s at 250 km altitude.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s00585-998-0161-3
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Production of $0^{++} $ glueball from double diffractive process in high energy $p+p(\bar p)$ collision (1999)
    Springer
    The European physical journal 7 (1999), S. 87-93 
    Details
    ISSN: 1434-6052
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract. Motivated by the recent experiments about candidates for glueball from different processes, we discuss in this paper the production of $0^{++}$ glueball from double diffractive scattering at momentum transfer $|t|\lower4pt$ \buildrel 〈\over\sim $ 1GeV^2$ in high energy $p+p(\bar p)$ collision. We employ the phenomenology of Pomeron ( $I\!\! P$ ) of Donnachie-Landshoff, the field theory model of $I\! P$ of Landshoff-Nachtmann and the relevant calculating approach. We assume while $I\! P$ coupling with glueball, the $0^{++}$ glueball can be considered as a bound state of two non-perturbative massive gluons. We evaluate the dependence of cross section for $0^{++}$ glueball production on system energy $\sqrt{s}$ and show that it could be tested experimentally.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s100529800961
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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