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Journal Article

(B-L) Symmetry vs. Neutrino Seesaw

MPS-Authors
http://pubman.mpdl.mpg.de/cone/persons/resource/persons20713

Nicolai,  Hermann
Quantum Gravity & Unified Theories, AEI-Golm, MPI for Gravitational Physics, Max Planck Society;

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Fulltext (public)

1205.5887
(Preprint), 147KB

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Citation

Latosinski, A., Meissner, K. A., & Nicolai, H. (2013). (B-L) Symmetry vs. Neutrino Seesaw. The European Physical Journal C - Particles and Fields, 73: 2336. doi:10.1140/epjc/s10052-013-2336-7.


Cite as: http://hdl.handle.net/11858/00-001M-0000-000E-FCDB-1
Abstract
We compute the effective coupling of the Majoron to W bosons at $\cO(\hbar)$ by evaluating the matrix element of the (B-L) current between the vacuum and a $W^+W^-$ state. The (B-L) anomaly vanishes, but the amplitude does not vanish as a result of a UV finite and non-local contribution which is entirely due to the mixing between left-chiral and right-chiral neutrinos. The result shows how anomaly-like couplings may arise in spite of the fact that the (B-L) current remains exactly conserved to all orders in $\hbar$, lending additional support to our previous proposal to identify the Majoron with the axion.