Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1999-08-02
Phys.Rev. D62 (2000) 055003
Physics
High Energy Physics
High Energy Physics - Phenomenology
11 pages, updated, to appear in PRD
Scientific paper
10.1103/PhysRevD.62.055003
It is shown that a Nambu-Goldstone (NG) field may be coherently produced by a large number of particles in spite of the fact that the NG bosons do not couple to flavor conserving scalar densities like $\bar{\psi}\psi$. If a flavor oscillation process takes place the phases of the pseudo-scalar or flavor violating densities of different particles do not necessarily cancel each other. The NG boson gets a macroscopic source whenever the total (spontaneously broken) quantum number carried by the source particles suffers a net increase or decrease in time. If the lepton numbers are spontaneously broken such classical NG (majoron) fields may significantly change the neutrino oscillation processes in stars pushing the observational capabilities of neutrino-majoron couplings down to $m_{\nu}/300$ GeV.
Bento Luis
Berezhiani Zurab
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