D-brane standard model variants and split supersymmetry: Unification and fermion mass predictions
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Ημερομηνία
Συγγραφείς
Τίτλος Εφημερίδας
Περιοδικό ISSN
Τίτλος τόμου
Εκδότης
Περίληψη
Τύπος
Είδος δημοσίευσης σε συνέδριο
Είδος περιοδικού
peer reviewed
Είδος εκπαιδευτικού υλικού
Όνομα συνεδρίου
Όνομα περιοδικού
Physical Review D
Όνομα βιβλίου
Σειρά βιβλίου
Έκδοση βιβλίου
Συμπληρωματικός/δευτερεύων τίτλος
Περιγραφή
We study D-brane inspired models with U(3)xU(2)xU(1)(N) gauge symmetry in the context of split supersymmetry. We consider configurations with one, two and three (N=1,2,3) Abelian branes and derive all hypercharge embeddings which imply a realistic particle content. Then, we analyze the implications of split supersymmetry on the magnitude of the string scale, the gauge coupling evolution, the third family fermion mass relations and the gaugino masses. We consider gauge coupling relations which may arise in parallel as well as intersecting brane scenarios and classify the various models according to their predictions for the magnitude of the string scale and the low energy implications. In the parallel brane scenario where the U(1) branes are superposed to U(2) or U(3) brane stacks, varying the split-SUSY scale in a wide range, we find three distinct cases of models predicting a high, intermediate and low string scale, M-S similar to 10(16) GeV, M-S similar to 10(7) GeV and M-S similar to 10(4) GeV, respectively. We further find that in the intermediate string scale model the low energy ratio m(b)/m(tau) is compatible with b-tau Yukawa unification at the string scale. Furthermore, we perform a similar analysis for arbitrary Abelian gauge coupling relations at M-S corresponding to possible intersecting brane models. We find cases which predict a string scale of the order M-S >= 10(14) GeV that accommodate a right-handed neutrino mass of the same order so that a seesaw type, light, left-handed neutrino component is obtained in the sub-eV range as required by experimental and cosmological data. Finally, a short discussion is devoted to the gaugino masses and the lifetime of the gluino.
Περιγραφή
Λέξεις-κλειδιά
extended supersymmetry, intersecting branes, string theory, orbifolds, vacua
Θεματική κατηγορία
Παραπομπή
Σύνδεσμος
<Go to ISI>://000241723900062
http://prd.aps.org/abstract/PRD/v74/i7/e075007
http://prd.aps.org/abstract/PRD/v74/i7/e075007
Γλώσσα
en
Εκδίδον τμήμα/τομέας
Όνομα επιβλέποντος
Εξεταστική επιτροπή
Γενική Περιγραφή / Σχόλια
Ίδρυμα και Σχολή/Τμήμα του υποβάλλοντος
Πανεπιστήμιο Ιωαννίνων. Σχολή Επιστημών και Τεχνολογιών. Τμήμα Βιολογικών Εφαρμογών και Τεχνολογιών