Proton stability and superstring Z′
نویسندگان
چکیده
منابع مشابه
Proton Stability and Superstring Z
Recently it was argued that proton lifetime limits impose that the scale of quantum gravity must be above 10GeV. By studying the proton stability in the context of realistic heterotic–string models, I propose that proton longevity necessitates the existence of an additional U(1)Z′ symmetry, which is of non–GUT origin and remains unbroken down to intermediate, or low, energies. It is shown that ...
متن کاملProton Stability and Superstring Z ′ Alon
Recently it was argued that proton lifetime limits impose that the scale of quantum gravity must be above 10GeV. By studying the proton stability in the context of realistic heterotic–string models, I propose that proton longevity necessitates the existence of an additional U(1)Z′ symmetry, which is of non–GUT origin and remains unbroken down to intermediate, or low, energies. It is shown that ...
متن کاملProton stability in superstring derived models
I discuss the problem of proton decay, from dimension four, five and six operators, in superstring derived standard–like models. I classify the sectors that produce color triplet superfields which may generate proton decay from dimension five and six operators. I show that for two of these sectors there exist a unique superstring doublet–triplet splitting mechanism that projects out the color t...
متن کاملDecomposition Rank and Z-stability
We show that separable, simple, nonelementary, unital C∗-algebras with finite decomposition rank absorb the Jiang–Su algebra Z tensorially. This has a number of consequences for Elliott’s program to classify nuclear C∗algebras by their K-theory data. In particular, it completes the classification of C∗-algebras associated to uniquely ergodic, smooth, minimal dynamical systems by their ordered K...
متن کاملNuclear dimension and Z-stability
Simple, separable, unital, monotracial and nuclear C∗-algebras are shown to have finite nuclear dimension whenever they absorb the Jiang–Su algebraZ tensorially. This completes the proof of the Toms–Winter conjecture in the unique trace case. The structure theory of simple nuclearC∗-algebras is currently undergoing revolutionary progress, driven by the discovery of regularity properties of vari...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Physics Letters B
سال: 2001
ISSN: 0370-2693
DOI: 10.1016/s0370-2693(01)00021-1