221 citations · 2.2k across the 67 of their papers we have counts for
10 papers · 1 filter
Supersymmetry and R_b in the light of LEP 1.5
J. Ellis, J. Lopez, D. Nanopoulos
We re-examine the possible magnitude of the supersymmetric contribution to in the light of the constraints imposed by the absence of…
A new scenario for string unification
J. Lopez, D. Nanopoulos
We present a new scenario for gauge coupling unification in flipped SU(5) string models, which identifies the scale of SU(3) and SU(2) unification with the empirical $M_{\…
Lowering alpha_s by flipping SU(5)
J. Ellis, J. Lopez, D. Nanopoulos
We show that the prediction for in flipped SU(5) is naturally lower than in minimal SU(5), and that the former can accommodate the full range of presently all…
Vanishing Str M^2 in the presence of anomalous U_A(1)
J. Lopez, D. Nanopoulos
We show that the presence of an anomalous factor in the gauge group of string-derived models may have the new and important phenomenological consequence of allowing th…
The Missing Doublet Model Revamped
J. Lopez, D. Nanopoulos
We revisit the Missing Doublet Model (MDM) as a means to address the apparent difficulties of the minimal supergravity model in dealing with the doublet-triplet splitting p…
in supersymmetric models
X. Wang, J. Lopez, D. Nanopoulos
We compute the supersymmetric contribution to in a variety of supersymmetric models. In the context of supergravity models wit…