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  • 1995-1999  (2)
  • 13.10.+q  (1)
  • 14.60.St  (1)
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  • 1995-1999  (2)
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  • 1
    Electronic Resource
    Electronic Resource
    Possible manifestations of the existence of a fourth-generation neutrino (1999)
    Springer
    JETP letters 69 (1999), S. 434-440 
    Details
    ISSN: 1090-6487
    Keywords: 14.60.St ; 98.70.Rz
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract A fourth generation of fermions predicted by the phenomenological heterotic string models can possess a new, strictly conserved charge. Among other things, this leads to the hypothesis of the existence of a fourth massive stable neutrino. A comparison of this hypothesis with the data obtained in the DAMA underground experiment to search for massive weakly-interacting cosmic particles with hidden mass and with the EGRET measurements of the 〉1 GeV galactic gamma-ray background gives a value m≈50 GeV for the possible mass of the fourth neutrino. It is shown that the hypothesis can be checked in accelerator experiments. The positron signal from annihilation of massive relic neutrinos in the galaxy is calculated. A search for this signal is is within the reach of planned cosmic-ray investigations.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1134/1.568047
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    The reaction $$e^ + e^ - \to \gamma \pi ^0 \to \gamma v\overline v $$ as a probe of neutrino mass (1997)
    Springer
    JETP letters 66 (1997), S. 133-137 
    Details
    ISSN: 1090-6487
    Keywords: 13.10.+q ; 14.60.Pq ; 13.65.+i
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The reaction $$e^ + e^ - \to \gamma \pi ^0 \to \gamma v\overline v $$ is considered. It is shown that this reaction possesses a clear signature, producing in the resonance region practically monochromatic photons, which can easily be distinguished from background bremsstrahlung photons. Since the cross section of the reaction is proportional to the square of the neutrino mass, such a reaction can be used as a probe for neutrino mass.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1134/1.567492
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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