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Non-universal Z from SO(10) GUTs with vector-like family and the origin of neutrino masses

Non-universal Z from SO(10) GUTs with vector-like family and the origin of neutrino masses
Non-universal Z from SO(10) GUTs with vector-like family and the origin of neutrino masses

A Z gauge boson with mass around the (few) TeV scale is a popular example of physics beyond the Standard Model (SM) and can be a fascinating remnant of a Grand Unified Theory (GUT). Recently, Z models with non-universal couplings to the SM fermions due to extra vector-like states have received attention as potential explanations of the present RK, RK anomalies; this includes GUT model proposals based on the SO(10) group. In this paper we further develop GUT models with a flavour non-universal low scale Z and clarify several outstanding issues within them. First, we successfully incorporate a realistic neutrino sector (with linear and/or inverse low scale seesaw mechanism), which was so far a missing ingredient. Second, we investigate in detail their compatibility with the RK, RK anomalies; we find that the anomalies do not have a consistent explanation within such models. Third, we demonstrate that these models have other compelling phenomenological features; we study the correlations between the flavour violating processes of μ→3e and μ–e conversion in a muonic atom, showing how a GUT imprint could manifest itself in experiments.

0550-3213
578-605
Antusch, Stefan
6a8c0380-78ea-4bcb-afad-4348d84eafba
Hohl, Christian
e29a6a87-c017-4a97-8aed-7a8bf56e865a
King, Steve F.
f8c616b7-0336-4046-a943-700af83a1538
Susič, Vasja
3e435921-0bfb-4ee8-b68f-3e58e26caf5c
Antusch, Stefan
6a8c0380-78ea-4bcb-afad-4348d84eafba
Hohl, Christian
e29a6a87-c017-4a97-8aed-7a8bf56e865a
King, Steve F.
f8c616b7-0336-4046-a943-700af83a1538
Susič, Vasja
3e435921-0bfb-4ee8-b68f-3e58e26caf5c

Antusch, Stefan, Hohl, Christian, King, Steve F. and Susič, Vasja (2018) Non-universal Z from SO(10) GUTs with vector-like family and the origin of neutrino masses. Nuclear Physics B, 934, 578-605. (doi:10.1016/j.nuclphysb.2018.07.022).

Record type: Article

Abstract

A Z gauge boson with mass around the (few) TeV scale is a popular example of physics beyond the Standard Model (SM) and can be a fascinating remnant of a Grand Unified Theory (GUT). Recently, Z models with non-universal couplings to the SM fermions due to extra vector-like states have received attention as potential explanations of the present RK, RK anomalies; this includes GUT model proposals based on the SO(10) group. In this paper we further develop GUT models with a flavour non-universal low scale Z and clarify several outstanding issues within them. First, we successfully incorporate a realistic neutrino sector (with linear and/or inverse low scale seesaw mechanism), which was so far a missing ingredient. Second, we investigate in detail their compatibility with the RK, RK anomalies; we find that the anomalies do not have a consistent explanation within such models. Third, we demonstrate that these models have other compelling phenomenological features; we study the correlations between the flavour violating processes of μ→3e and μ–e conversion in a muonic atom, showing how a GUT imprint could manifest itself in experiments.

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Accepted/In Press date: 23 July 2018
e-pub ahead of print date: 25 July 2018
Published date: 1 September 2018

Identifiers

Local EPrints ID: 423045
URI: https://eprints.soton.ac.uk/id/eprint/423045
ISSN: 0550-3213
PURE UUID: 1000aec7-097d-4b65-afcb-924b12a80869

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Date deposited: 13 Aug 2018 16:30
Last modified: 13 Mar 2019 18:10

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Contributors

Author: Stefan Antusch
Author: Christian Hohl
Author: Steve F. King
Author: Vasja Susič

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