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The Bremsstrahlung Process Nu_Tau -> Nu_e E+ E- Gamma

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arxiv hep-ph/9804334 v1 pith:UZWY233D submitted 1998-04-20 hep-ph

The Bremsstrahlung Process Nu_Tau -> Nu_e E+ E- Gamma

classification hep-ph
keywords processbremsstrahlunggammaneutrinosamplitudeangularattentioncalculate
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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The bremsstrahlung process Nu_Tau -> Nu_e E+ E- Gamma is the dominant photon-producing decay of heavy Tau neutrinos with m_Nu_Tau > 2 m_e so that this process is instrumental for supernova 1987A constraints on the properties of these particles, notably on their mixing amplitude with Nu_e. We calculate the rate of the bremsstrahlung process as well as the photon spectrum and the angular distribution relative to the spin direction of the parent neutrino. We carefully pay attention to the difference between Dirac and Majorana neutrinos.

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