Fermion hierarchy from sfermion anarchy

Altmannshofer, Wolfgang; Frugiuele, Claudia; Harnik, Roni

doi:10.1007/JHEP12(2014)180

Title: Fermion hierarchy from sfermion anarchy

Journal Article · Wed Dec 31 00:00:00 EST 2014 · Journal of High Energy Physics (Online)

DOI:https://doi.org/10.1007/JHEP12(2014)180· OSTI ID:1226288

Altmannshofer, Wolfgang ^[1]; Frugiuele, Claudia ^[2]; Harnik, Roni ^[2]

Perimeter Inst. for Theoretical Physics, Waterloo, ON (Canada)
Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)

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.

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Research Organization:: Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)

Sponsoring Organization:: USDOE Office of Science (SC), High Energy Physics (HEP)

Grant/Contract Number:: AC02-07CH11359

OSTI ID:: 1226288

Report Number(s):: FERMILAB-PUB-14-310-T; arXiv eprint number arXiv:1409.2522; TRN: US1500548

Journal Information:: Journal of High Energy Physics (Online), Vol. 2014, Issue 12; ISSN 1029-8479

Publisher:: Springer BerlinCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 17 works

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