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On (g − 2)μ from gauged U(1)X
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Journal Article
On (g − 2)μ from gauged U(1)X
2022
Overview
A
bstract
We investigate an economical explanation for the (
g −
2)
μ
anomaly with a neutral vector boson from a spontaneously broken U(1)
X
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 U(1)
X
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
L
μ
− L
τ
or models with a ratio of electron to baryon number close to
−
2. The key complementary constraints are from the searches for nonstandard neutrino interactions. Furthermore, we comment on the severe challenges to chiral U(1)
X
solutions and show the severe constraints on a particularly promising such candidate.
Publisher
Springer Berlin Heidelberg,Springer Nature B.V,Springer,SpringerOpen
