Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1103/physrevd.50.2893 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Proton decay and flavor violating thresholds in SO(10) models.
Phys Rev Lett
May 2008
Department of Physics, Texas A&M University, College Station, Texas 77843-4242, USA.
Discovery of neutrino mass has put the spotlight on the supersymmetric (SUSY) SO(10) model as a natural candidate for grand unification of forces and matter. However, the suppression of proton decay is a major problem in such SUSY grand unified models. In this Letter we show how to alleviate this problem by simple threshold effects which raise the colored Higgsino masses and the grand unification scale to greater than or similar to 10(17) GeV.
View Article and Find Full Text PDFSupersymmetric standard model from the heterotic string.
Phys Rev Lett
March 2006
Deutsches Elektronen-Synchrotron DESY, 22603 Hamburg, Germany.
We present a [FORMULA: SEE TEXT] orbifold compactification of the E8xE8 heterotic string which leads to the (supersymmetric) standard model gauge group and matter content. The quarks and leptons appear as three 16-plets of SO(10), whereas the Higgs fields do not form complete SO(10) multiplets. The model has large vacuum degeneracy.
View Article and Find Full Text PDFRadiative seesaw mechanism and degenerate neutrinos.
Phys Rev Lett
December 2005
J. Stefan Institute, Ljubljana, Slovenia.
The radiative seesaw mechanism of Witten generates the right-handed neutrino masses in SO(10) with the spinorial 16(H) Higgs field. We study here analytically the 2nd and 3rd generations for the minimal Yukawa structure containing and Higgs representations. In the approximation of small 2nd generation masses and gauge loop domination we find the following results: (1) beta-tau unification, (2) natural coexistence between large theta(l) and small theta(q), and (3) degenerate neutrinos.
View Article and Find Full Text PDFSupersymmetric SO10 seesaw mechanism with low B-L scale.
Phys Rev Lett
October 2005
Scuola Superiore di Studi Avanzati, Italy.
We propose a new seesaw mechanism for neutrino masses within a class of supersymmetric SO(10) models with broken D parity. It is shown that in such scenarios the B-L scale can be as low as TeV without generating inconsistencies with gauge coupling unification nor with the required magnitude of the light neutrino masses. This leads to a possibly light new neutral gauge boson as well as relatively light quasi-Dirac heavy leptons.
View Article and Find Full Text PDFB-tau unification and large atmospheric mixing: a case for a noncanonical seesaw mechanism.
Phys Rev Lett
February 2003
J. Stefan Institute, 1001 Ljubljana, Slovenia.
We study the second and third generation masses in the context of the minimal renormalizable SO(10) theory. We show that if the seesaw takes the noncanonical (type II) form, large atmospheric neutrino mixing angle requires b-tau unification.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!