Eur. Phys. J. C (2013) 73: 2322
https://doi.org/10.1140/epjc/s10052-013-2322-0

Regular Article - Theoretical Physics

Electroweak supersymmetry around the electroweak scale

¹ State Key Laboratory of Theoretical Physics and Kavli Institute for Theoretical Physics China (KITPC), Institute of Theoretical Physics, Chinese Academy of Sciences, Beijing, 100190, P.R. China
² George P. and Cynthia W. Mitchell Institute for Fundamental Physics and Astronomy, Texas A&M University, College Station, TX, 77843, USA
³ Astroparticle Physics Group, Houston Advanced Research Center (HARC), Mitchell Campus, Woodlands, TX, 77381, USA
⁴ Division of Natural Sciences, Academy of Athens, 28 Panepistimiou Avenue, Athens, 10679, Greece

^* e-mail: tli@itp.ac.cn

Received: 19 November 2012
Revised: 30 January 2013
Published online: 23 February 2013

Abstract

Inspired by the phenomenological constraints, LHC supersymmetry and Higgs searches, dark matter search as well as string model building, we propose the electroweak supersymmetry around the electroweak scale: the squarks and/or gluinos are around a few TeV while the sleptons, sneutrinos, bino and winos are within 1 TeV. The higgsinos can be either heavy or light. We consider the bino as the dominant component of dark matter candidate, and the observed dark matter relic density is achieved via the neutralino–stau coannihilations. Considering the Generalized Minimal Supergravity (GmSUGRA), we show explicitly that electroweak supersymmetry can be realized, and gauge coupling unification can be preserved. With two scenarios, we study the viable parameter spaces that satisfy all the current phenomenological constraints, and we present the concrete benchmark points. Furthermore, we comment on the fine-tuning problem and LHC searches.