Fermion hierarchy from sfermion anarchy
Abstract
We present a framework to generate the hierarchical flavor structure of Standard Model quarks and leptons from loops of superpartners. The simplest model consists of the minimal supersymmetric standard model with tree level Yukawa couplings for the third generation only and anarchic squark and slepton mass matrices. Agreement with constraints from low energy flavor observables, in particular Kaon mixing, is obtained for supersymmetric particles with masses at the PeV scale or above. In our framework both the second and the first generation fermion masses are generated at 1-loop. Despite this, a novel mechanism generates a hierarchy among the first and second generations without imposing a symmetry or small parameters. A second-to-first generation mass ratio of order 100 is typical. The minimal supersymmetric standard model thus includes all the necessary ingredients to realize a fermion spectrum that is qualitatively similar to observation, with hierarchical masses and mixing. The minimal framework produces only a few quantitative discrepancies with observation, most notably the muon mass is too low. Furthermore, we discuss simple modifications which resolve this and also investigate the compatibility of our model with gauge and Yukawa coupling Unification.
- Authors:
-
- Perimeter Inst. for Theoretical Physics, Waterloo, ON (Canada)
- Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
- Publication Date:
- Research Org.:
- Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), High Energy Physics (HEP)
- OSTI Identifier:
- 1226288
- Report Number(s):
- FERMILAB-PUB-14-310-T
Journal ID: ISSN 1029-8479; arXiv eprint number arXiv:1409.2522; TRN: US1500548
- Grant/Contract Number:
- AC02-07CH11359
- 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: 2014; Journal Issue: 12; Journal ID: ISSN 1029-8479
- Publisher:
- Springer Berlin
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; quark masses and SM parameters; supersymmetric standard model
Citation Formats
Altmannshofer, Wolfgang, Frugiuele, Claudia, and Harnik, Roni. Fermion hierarchy from sfermion anarchy. United States: N. p., 2014.
Web. doi:10.1007/JHEP12(2014)180.
Altmannshofer, Wolfgang, Frugiuele, Claudia, & Harnik, Roni. Fermion hierarchy from sfermion anarchy. United States. https://doi.org/10.1007/JHEP12(2014)180
Altmannshofer, Wolfgang, Frugiuele, Claudia, and Harnik, Roni. Wed .
"Fermion hierarchy from sfermion anarchy". United States. https://doi.org/10.1007/JHEP12(2014)180. https://www.osti.gov/servlets/purl/1226288.
@article{osti_1226288,
title = {Fermion hierarchy from sfermion anarchy},
author = {Altmannshofer, Wolfgang and Frugiuele, Claudia and Harnik, Roni},
abstractNote = {We present a framework to generate the hierarchical flavor structure of Standard Model quarks and leptons from loops of superpartners. The simplest model consists of the minimal supersymmetric standard model with tree level Yukawa couplings for the third generation only and anarchic squark and slepton mass matrices. Agreement with constraints from low energy flavor observables, in particular Kaon mixing, is obtained for supersymmetric particles with masses at the PeV scale or above. In our framework both the second and the first generation fermion masses are generated at 1-loop. Despite this, a novel mechanism generates a hierarchy among the first and second generations without imposing a symmetry or small parameters. A second-to-first generation mass ratio of order 100 is typical. The minimal supersymmetric standard model thus includes all the necessary ingredients to realize a fermion spectrum that is qualitatively similar to observation, with hierarchical masses and mixing. The minimal framework produces only a few quantitative discrepancies with observation, most notably the muon mass is too low. Furthermore, we discuss simple modifications which resolve this and also investigate the compatibility of our model with gauge and Yukawa coupling Unification.},
doi = {10.1007/JHEP12(2014)180},
journal = {Journal of High Energy Physics (Online)},
number = 12,
volume = 2014,
place = {United States},
year = {Wed Dec 31 00:00:00 EST 2014},
month = {Wed Dec 31 00:00:00 EST 2014}
}
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