Naturalness and dark matter in a realistic intersecting D6-brane model

Journal of High Energy Physics

Lorenzo Calibbi¹  Tianjun Li¹  Jia-Shu Niu¹  Waqas Ahmed¹  Shabbar Raza²  Xiao-Chuan Wang³ 

[1] CAS Key Laboratory of Theoretical Physics, Institute of Theoretical Physics, Chinese Academy of Sciences;Department of Physics, Federal Urdu University of Arts, Science and Technology;Department of Physics, Henan Normal University;

关键词: Strings and branes phenomenology;    Supersymmetry Phenomenology;   

DOI  :  10.1007/JHEP06(2018)126

来源: DOAJ

【 摘 要 】

Abstract We revisit a three-family Pati-Salam model with a realistic phenomenology from intersecting D6-branes in Type IIA string theory compactified on a T 6 /(ℤ2 × ℤ2) orientifold, and study its naturalness in view of the current LHC and dark matter searches. We discuss spectrum and phenomenological features of this scenario demanding fine tuning better than 1%. This requirement restricts the lightest neutralino to have mass less than about 600 GeV. We observe that the viable parameter space is tightly constrained by the requirements of naturalness and consistency with the observed dark matter relic density, so that it is fully testable at current and future dark matter searches, unless a non-thermal production mechanism of dark matter is at work. We find that Z-resonance, h-resonance, A-funnel and light stau/stop-neutralino coannihilation solutions are consistent with current LHC and dark matter constraints while the “well-tempered” neutralino scenario is ruled out in our model. Moreover, we observe that only Bino, Higgsinos, right-handed staus and stops can have mass below 1 TeV.

【 授权许可】

Unknown