Dark Matter Generation and Split Supersymmetry
نویسنده
چکیده
We analyze a simple Split Supersymmetry scenario where fermion masses come from anomaly mediation, yielding ms ∼ 1000 TeV, m3/2 ∼ 100 TeV, and mf ∼ 1 TeV. We find that the decay chain of moduli fields → gravitinos → LSPs generates dark matter more efficiently than perturbative freeze-out, allowing for a light, LHC visible spectrum. These decaying moduli can also weaken cosmological constraints on the axion decay constant. With squark masses of order 1000 TeV, LHC gluinos will decay millimeters from their primary vertices, resulting in a striking experimental signature, and the suppression of Flavor Changing Neutral Currents is almost sufficient to allow arbitrary mixing in squark mass matrices.
منابع مشابه
Indirect Signals from Dark Matter in Split Supersymmetry
We study the possibilities for the indirect detection of dark matter in Split Supersymmetry from γ-rays, positrons, and antiprotons. The most promising signal is the γ-ray line, which may be observable at the next generation of detectors. For certain halo profiles and a high mass neutralino, the line can even be visible in current experiments. The continuous γ-ray signal may be observable, if t...
متن کاملSplit Supersymmetry and Dark Matter Generation
We analyze a simple Split Supersymmetry scenario where fermion masses come from anomaly mediation, yielding ms ∼ 1000 TeV, m3/2 ∼ 100 TeV, and mf ∼ 1 TeV. We consider non-thermal dark matter production in the presence of moduli, and we find that the decay chains of moduli → LSPs and moduli → gravitinos → LSPs generate dark matter more efficiently than perturbative freeze-out, allowing for a lig...
متن کاملCollider searches and cosmology in the MSSM with heavy scalars
In a variety of supersymmetric extensions of the Standard Model, the scalar partners of the quarks and leptons are predicted to be very heavy and beyond the reach of next-generation colliders. For instance, the realization of electroweak baryogenesis in supersymmetry requires new sources of CP-violation, which can only be naturally accommodated with electric dipole moment constraints if the fir...
متن کاملDark Matter Constraints on Gaugino/Higgsino Masses in Split Supersymmetry and Their Implications at Colliders
In split supersymmetry, gauginos and Higgsinos are the only supersymmetric particles which are possibly accessible at foreseeable colliders. While the direct experimental searches, such as LEP and Tevatron experiments, gave robust lower bounds on the masses of these particles, the cosmic dark matter can give some upper bounds and thus have important implications for the searches at future colli...
متن کاملR-parity violation in split supersymmetry
In the recently proposed ‘split supersymmetry’ scenario, the squark and slepton masses are allowed to be at a high scale while the gauginos and Higgsinos are within a TeV. We show that in a theory with broken R-parity, the parameter space of such a scenario allows a situation where the lightest neutralino is still stable on the cosmological scale and can be a dark matter candidate. We also sepa...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 2006