Anomaly free Froggatt-Nielsen models of flavor
Journal Article
·
· Journal of High Energy Physics (Online)
- Jozef Stefan Inst. (IJS), Ljubljana (Slovenia); U. Cincinnati
- Univ. of Cincinnati, OH (United States)
We introduce two anomaly free versions of Froggatt-Nielsen (FN) models, based on either $$G_{\rm FN}=U(1)^3$$ or $$G_{\rm FN}=U(1)$$ horizontal symmetries, that generate the SM quark and lepton flavor structures. The structure of these ``inverted'' FN models is motivated by the clockwork mechanism: the chiral fields, singlets under $$G_{\rm FN}$$, are supplemented by chains of vector-like fermions charged under $$G_{\rm FN}$$. Unlike the traditional FN models the hierarchy of quark and lepton masses is obtained as an expansion in $$M/\langle \phi\rangle$$, where $$M$$ is the typical vector-like fermion mass, and $$\langle \phi\rangle$$ the flavon vacuum expectation value. The models can be searched for through deviations in flavor observables such as $$K-\bar K$$ mixing, $$\mu\to e$$ conversion, etc., where the present bounds restrict the masses of vector-like fermions to be above $${\mathcal O}(10^7~{\rm GeV})$$. If $$G_{\rm FN}$$ is gauged, the models can also be probed by searching for the flavorful $Z'$ gauge bosons. In principle, the $Z'$s can be very light, and can be searched for using precision flavor, astrophysics, and beam dump experiments.
- Research Organization:
- Univ. of Cincinnati, OH (United States)
- Sponsoring Organization:
- Slovenian Research Agency; USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
- Grant/Contract Number:
- SC0011784
- OSTI ID:
- 1593764
- Journal Information:
- Journal of High Energy Physics (Online), Journal Name: Journal of High Energy Physics (Online) Journal Issue: 10 Vol. 2019; ISSN 1029-8479
- Publisher:
- Springer BerlinCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Chiral Froggatt-Nielsen models, gauge anomalies and flavourful axions
|
journal | January 2020 |
Chiral Froggatt-Nielsen models, gauge anomalies and flavourful axions
|
text | January 2020 |
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