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Atomki anomaly in family-dependent U (1)′ extension of the Standard Model

Atomki anomaly in family-dependent U (1)′ extension of the Standard Model
Atomki anomaly in family-dependent U (1)′ extension of the Standard Model

In the context of a gauge invariant, nonanomalous, and family-dependent (nonuniversal) U(1)′ extension of the Standard Model, wherein a new high-scale mechanism generates masses and couplings for the first two fermion generations and the standard Higgs mechanism does so for the third one, we find solutions to the anomaly observed by the Atomki Collaboration in the decay of excited states of beryllium, in the form of a very light Z′ state, stemming from the U(1)′ symmetry breaking, with significant axial couplings so as to evade a variety of low-scale experimental constraints.

2470-0010
1-7
Delle Rose, Luigi
19c81ce1-e14b-4e4c-b72d-0d74cbb331db
Khalil, Shaaban
2320836f-4666-474a-9aa4-bdfe6eb086b7
King, Simon J.D.
2e855764-14d3-4bdb-b0d9-e0659b969a3b
Moretti, Stefano
b57cf0f0-4bc3-4e02-96e3-071255366614
Thabt, Ahmed M.
41ab228e-3efd-4898-a035-9c5ad8d1fb77
Delle Rose, Luigi
19c81ce1-e14b-4e4c-b72d-0d74cbb331db
Khalil, Shaaban
2320836f-4666-474a-9aa4-bdfe6eb086b7
King, Simon J.D.
2e855764-14d3-4bdb-b0d9-e0659b969a3b
Moretti, Stefano
b57cf0f0-4bc3-4e02-96e3-071255366614
Thabt, Ahmed M.
41ab228e-3efd-4898-a035-9c5ad8d1fb77

Delle Rose, Luigi, Khalil, Shaaban, King, Simon J.D., Moretti, Stefano and Thabt, Ahmed M. (2019) Atomki anomaly in family-dependent U (1)′ extension of the Standard Model. Physical Review D, 99 (5), 1-7, [055022]. (doi:10.1103/PhysRevD.99.055022).

Record type: Article

Abstract

In the context of a gauge invariant, nonanomalous, and family-dependent (nonuniversal) U(1)′ extension of the Standard Model, wherein a new high-scale mechanism generates masses and couplings for the first two fermion generations and the standard Higgs mechanism does so for the third one, we find solutions to the anomaly observed by the Atomki Collaboration in the decay of excited states of beryllium, in the form of a very light Z′ state, stemming from the U(1)′ symmetry breaking, with significant axial couplings so as to evade a variety of low-scale experimental constraints.

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PhysRevD.99.055022 - Version of Record
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e-pub ahead of print date: 18 March 2019
Published date: March 2019

Identifiers

Local EPrints ID: 430659
URI: http://eprints.soton.ac.uk/id/eprint/430659
ISSN: 2470-0010
PURE UUID: ff884afa-dbc9-4d39-a15f-d319866a70e7

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Date deposited: 08 May 2019 16:30
Last modified: 16 Dec 2019 17:38

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Contributors

Author: Luigi Delle Rose
Author: Shaaban Khalil
Author: Simon J.D. King
Author: Stefano Moretti
Author: Ahmed M. Thabt

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