paper

On From Gauged

arXiv:2203.13731 · doi:10.1007/JHEP07(2022)098

Abstract

We investigate an economical explanation for the anomaly with a neutral vector boson from a spontaneously broken gauge symmetry. The Standard Model fermion content is minimally extended by 3 right-handed neutrinos. Using a battery of complementary constraints, we perform a thorough investigation of the renormalizable, quark flavor-universal, vector-like models, allowing for arbitrary kinetic mixing. Out of 419 models with integer charges not greater than ten, only 7 models are viable solutions, describing a narrow region in model space. These are either or models with a ratio of electron to baryon number close to . The key complementary constraints are from the searches for nonstandard neutrino interactions. Furthermore, we comment on the severe challenges to chiral solutions and show the severe constraints on a particularly promising such candidate.

41 pages, 6 figures, 3 tables

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