Split-SUSY versus SUSY GUTs
نویسندگان
چکیده
The gauge coupling unification is one of main motivations in the split-SUSY scenario, and the existence of the grand unified theories (GUTs) is assumed. We examine how to realize split-SUSY mass spectrum in the context of GUTs and find that the construction of split-SUSY GUTs is by no means straightforward. With R-symmetry breaking sources in the GUT sector, GUT particles play a role of the messengers in the gauge mediation scenario and their contributions to gaugino masses can be sizable. We find the upper bound on soft scalar masses of O(1010) GeV from consistency for constructing the split-SUSY GUT. Also, we discuss the attempt to construct R-symmetric GUT models. E-mail: [email protected] On leave of absence from Institute of Theoretical Physics, University of Tokushima, 770-8502, Japan E-mail: [email protected]
منابع مشابه
Gauge Coupling Unification: Strings versus SUSY-GUTs
Standard (level one) heterotic string models with standard model gauge group predict the unification of SU(3) and SU(2) gauge couplings whereas the U(1) factor is unified modulo an unknown normalization factor k1. On the other hand the unification mass is known. I argue that this situation is quite analogous (though opposite) to that in SUSYGUTs in which the U(1) normalization is known (k1 = 5/...
متن کاملEDMs in SUSY GUTs
SUSY GUTs may predict rich flavor violation, and the signature may be observable in the low-energy flavor physics. The SUSY breaking terms in the minimal supersymmetric standard model (MSSM) are sensitive to physics beyond the MSSM. When the origin of the SUSY breaking terms in the MSSM comes from dynamics around or above the GUT scale, the interactions in the SUSY GUTs may bring down the signa...
متن کاملSUSY GUTs with Yukawa Unification in the light of data
I provide a short overview of the hypothesis of Yukawa unification within SUSY GUTs, emphasizing its motivations and its predictivity-enhancing role. I then discuss the status of the tests of this hypothesis, and the major role played by observables in the flavor sector. Concerning the patterns of soft SUSY-breaking terms assumed at the GUT scale, I focus on the cases of universalities on sferm...
متن کاملOn the Possible Solution of the Doublet - Triplet Splitting Problem in Extended Su ( N ≥ 8 ) Susy Guts
The generalization of the " custodial symmetry " mechanism which leads to the natural (without fine tuning) explanation of the doublet-triplet hierarchy is suggested in the frames of extended SU (N ≥ 8) SUSY GUTs. It is shown also that such type of SUSY GUT can predict the value of strong gauge coupling constant α S (M Z) consistent with present experimental data.
متن کاملConstraining SUSY GUTs and Inflation with Cosmology
In the framework of Supersymmetric Grand Unified Theories (SUSY GUTs), the universe undergoes a cascade of symmetry breakings, during which topological defects can be formed. We address the question of the probability of cosmic string formation after a phase of hybrid inflation within a large number of models of SUSY GUTs in agreement with particle and cosmological data. We show that cosmic str...
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