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Title: Anomaly free Froggatt-Nielsen models of flavor

Abstract

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.

Authors:
ORCiD logo [1];  [2];  [2]
  1. Jozef Stefan Inst. (IJS), Ljubljana (Slovenia)
  2. Univ. of Cincinnati, OH (United States)
Publication Date:
Research Org.:
Univ. of Cincinnati, OH (United States)
Sponsoring Org.:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25); Slovenian Research Agency
OSTI Identifier:
1593764
Grant/Contract Number:  
SC0011784; 50510; P1-0035
Resource Type:
Accepted Manuscript
Journal Name:
Journal of High Energy Physics (Online)
Additional Journal Information:
Journal Name: Journal of High Energy Physics (Online); Journal Volume: 2019; Journal Issue: 10; Journal ID: ISSN 1029-8479
Publisher:
Springer Berlin
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; Beyond Standard Model; Gauge Symmetry; Quark Masses and SM Parameters

Citation Formats

Smolkovič, Aleks, Tammaro, Michele, and Zupan, Jure. Anomaly free Froggatt-Nielsen models of flavor. United States: N. p., 2019. Web. doi:10.1007/JHEP10(2019)188.
Smolkovič, Aleks, Tammaro, Michele, & Zupan, Jure. Anomaly free Froggatt-Nielsen models of flavor. United States. doi:10.1007/JHEP10(2019)188.
Smolkovič, Aleks, Tammaro, Michele, and Zupan, Jure. Thu . "Anomaly free Froggatt-Nielsen models of flavor". United States. doi:10.1007/JHEP10(2019)188. https://www.osti.gov/servlets/purl/1593764.
@article{osti_1593764,
title = {Anomaly free Froggatt-Nielsen models of flavor},
author = {Smolkovič, Aleks and Tammaro, Michele and Zupan, Jure},
abstractNote = {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.},
doi = {10.1007/JHEP10(2019)188},
journal = {Journal of High Energy Physics (Online)},
number = 10,
volume = 2019,
place = {United States},
year = {2019},
month = {10}
}

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