Work

Light third-generation squarks from flavour gauge messengers

Year: 2014

Type: article

Abstract: We study models of gauge-mediated supersymmetry breaking with a gauged horizontal SU(3)F symmetry acting on the quark superfields. If SU(3)F is broken nonsupersymmetrically by F -term vacuum expectation values, the massive gauge bosons and gauginos become messengers for SUSY breaking mediation. These gauge messenger fields induce a flavour-dependent, negative contribution to the soft masses of the squarks at one loop. In combination with the soft terms from standard gauge mediation, one obtains large and degenerate first- and second-generation squark masses, while the stops and sbottoms are light. We discuss the implications of this mechanism for the superparticle spectrum and for flavour precision observables. We also provide an explicit realization in a model with simultaneous SUSY and SU(3)F breaking.

Source: Journal of High Energy Physics

DOI: 10.1007/jhep04(2014)078

Authors: Felix Brümmer, Moritz McGarrie, Andreas Weiler

Institutions: Scuola Internazionale Superiore di Studi Avanzati, Deutsches Elektronen-Synchrotron DESY, University of the Witwatersrand, National Institute for Theoretical Physics, European Organization for Nuclear Research

Language: English

Topic: Particle physics theoretical and experimental studies

Subfield: Nuclear and High Energy Physics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: diamond

Funders: Alexander von Humboldt-Stiftung, Deutsche Forschungsgemeinschaft

OpenAlex ID: W1992264907