Majoron decay of neutrinos in matter

Details Majoron decay of neutrinos in matter Majoron decay of neutrinos in matter

Mar 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992phrvd..45.1557g&link_type=abstract

Physical Review D (Particles and Fields), Volume 45, Issue 5, 1 March 1992, pp.1557-1568

Astronomy and Astrophysics

Astrophysics

25

Elementary Particle Processes

Scientific paper

Using an helicity formalism for Majorana neutrino fields, we calculate the decay rates for the helicity-flipping and helicity-conserving Majoron decays of neutrinos propagating in dense media. We discuss the subtlety involved in the neutrino mixing in matter in a quantum-field-theoretical approach to clarify previous misunderstandings in the calculation of Majoron decays. General formulas, derived in a model-independent approach, can be applied to any number of neutrino generations and to the decay with production of any massless pseudoscalar boson. In particular, we discuss the two-generation case and show that in matter the helicity-flipping decays are dominant over the helicity-conserving decays. The implications of the Majoron decay for the neutrinos from astrophysical objects are also briefly discussed.

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