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Muonic force behind flavor anomalies

Greljo, Admir ; Soreq, Yotam ; Stangl, Peter ; Thomsen, Anders Eller ; Zupan, Jure

The journal of high energy physics, 2022-04, Vol.2022 (4), p.151-51, Article 151 [Peer Reviewed Journal]

Berlin/Heidelberg: Springer Berlin Heidelberg

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Title:
Muonic force behind flavor anomalies
Author: Greljo, Admir ; Soreq, Yotam ; Stangl, Peter ; Thomsen, Anders Eller ; Zupan, Jure
Subjects: Anomalies ; Beyond Standard Model ; Classical and Quantum Gravitation ; Elementary Particles ; Fermions ; Flavor (particle physics) ; Heavy Quark Physics ; High energy physics ; High Energy Physics - Phenomenology ; Leptons ; Muons ; Phenomenology ; Physics ; Physics and Astronomy ; PHYSICS OF ELEMENTARY PARTICLES AND FIELDS ; Quantum Field Theories ; Quantum Field Theory ; Quantum Physics ; Quarks ; Regular Article - Theoretical Physics ; Relativity Theory ; Standard model (particle physics) ; String Theory ; Symmetry
Is Part Of: The journal of high energy physics, 2022-04, Vol.2022 (4), p.151-51, Article 151
Notes: USDOE Office of Science (SC), High Energy Physics (HEP)
SC0011784
Description: A bstract We develop an economical theoretical framework for combined explanations of the flavor physics anomalies involving muons: ( g − 2) μ , R K ∗ , and b → sμ + μ − angular distributions and branching ratios, that was first initiated by some of us in ref. [ 1 ]. The Standard Model (SM) is supplemented with a lepton-flavored U(1) X gauge group. The U(1) X gauge boson with the mass of O (0 . 1) GeV resolves the ( g − 2) μ tension. A TeV-scale leptoquark, charged under the U(1) X , carries a muon number and mediates B -decays without prompting charged lepton flavor violation or inducing proton decay. We explore the theory space of the chiral, anomaly-free U(1) X gauge extensions featuring the above scenario, and identify many suitable charge assignments for the SM+3 ν R fermion content with the integer charges in the range X F i ∈ [ − 10 , 10]. We then carry out a comprehensive phenomenological study of the muonic force in representative benchmark models. Interestingly, we found models which can resolve the tension without conflicting the complementary constraints, and all of the viable parameter space will be tested in future muonic resonance searches. Finally, the catalog of the anomaly-free lepton-non-universal charge assignments motivated us to explore different directions in model building. We present a model in which the muon mass and the ( g − 2) μ are generated radiatively from a common short-distance dynamics after the U(1) X breaking. We also show how to charge a vector leptoquark under U(1) μ−τ in a complete gauge model.
Publisher: Berlin/Heidelberg: Springer Berlin Heidelberg
Language: English

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Muonic force behind flavor anomalies

Greljo, Admir ; Soreq, Yotam ; Stangl, Peter ; Thomsen, Anders Eller ; Zupan, Jure

Berlin/Heidelberg: Springer Berlin Heidelberg

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