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Physics Implications of Flat Directions in Free Fermionic Superstring Models II: Renormalization Group Analysis
G. Cleaver, M. Cvetic, J. R. Espinosa +3
We continue the investigation of the physics implications of a class of flat directions for a prototype quasi-realistic free fermionic string model (CHL5), building upon the result…
Implications of Solar and Atmospheric Neutrinos
Paul Langacker
The importance of non-zero neutrino mass as a probe of particle physics, astrophysics, and cosmology is emphasized. The present status and future prospects for the solar and atmosp…
Status of the Standard Model
Jens Erler, Paul Langacker
We review the experimental and theoretical status of the standard electroweak theory, and its fundamental parameters. We obtain the global best fit result for the Standard Model Hi…
Physics Implications of Flat Directions in Free Fermionic Superstring Models I: Mass Spectrum and Couplings
G. Cleaver, M. Cvetic, J. R. Espinosa +3
From the "top-down" approach we investigate physics implications of the class of D- and F- flat directions formed from non-Abelian singlets which are proven flat to all orders in t…
Z' Physics from Strings
Paul Langacker
Many extensions of the standard model, especially grand unified theories and superstring models, predict the existence of additional Z' bosons and associated exotic chiral supermul…
Flat Directions in Three-Generation Free-Fermionic String Models
Gerald Cleaver, Mirjam Cvetic, Jose R. Espinosa +2
In quasi-realistic string models that contain an anomalous U(1) the non-zero Fayet-Iliopoulos term triggers the shifting of the original vacuum to a new one along some flat directi…