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  • 1995-1999  (2)
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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Few body systems 26 (1999), S. 175-184 
    ISSN: 1432-5411
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract.  The transition operator for the radiative capture of mesons by protons is constructed starting from a chiral Lagrangian of the system obtained within the approach of hidden local symmetries. The transition operator is gauge invariant and its hadron radiative part satisfies exactly two relevant continuity equations.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Hyperfine interactions 101-102 (1996), S. 429-431 
    ISSN: 1572-9540
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract We have calculated exchange corrections for nuclear muon capture by3He using the hard-pion model and realistic nuclear wavefunctions. These currents modify the vector and axial part of the weak nuclear current. In their absence the rate is found to be about 12% smaller than experiment. Our aim is to test the hard-pion model by making a realistic estimate of the theoretical uncertainty and comparing the calculated rate with its experimental value. Results for the rate and spin observables will be presented at the symposium. The recent precise measurement of the rate (see the contributions of A.A. Vorobyov and W. Prymas in these proceedings) allows the most stringent test of exchange currents for muon capture to date.
    Type of Medium: Electronic Resource
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