Houston Advanced Research Center

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19912024

most citedPotential Sensitivity of Gamma-Ray Burster Observations to Wave Dispersion in Vacuo

1.4k citations

researchers with a paper here

Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.

collaborating institutions

Showing 1993 · hep-phShow all

19 papers · 2 filters

hep-ph1993★ 10 cited

New Precision Electroweak Tests of SU(5) x U(1) Supergravity

J. L. Lopez, D. V. Nanopoulos, G. T. Park +1

We explore the one-loop electroweak radiative corrections in $S U (5) \times U (1)$ supergravity via explicit calculation of vacuum-polarization and vertex-correction contributions to…

hep-ph1993★ 17 cited

A Layman's guide to SUSY GUTs

J. Lopez, D. Nanopoulos, A. Zichichi

The determination of the most straightforward evidence for the existence of the Superworld requires a guide for non-experts (especially experimental physicists) for them to make th…

hep-ph1993★ 15 cited

$b \to s γ$ and $ε_{b}$ Constraints on Two Higgs Doublet Model

Gye T. Park

We perform a combined analysis of two stringent constraints on the 2 Higgs doublet model, one coming from the recently announced CLEO II bound on $B (b \to s γ)$ and the oth…

hep-ph1993★ 9 cited

$b \to s γ$ and $Z \to b b$ Constraints on Two Higgs Doublet Model

Gye T. Park

We perform a combined analysis of two stringent constraints on two Higgs doublet model, coming from the recently announced CLEO II bound on $B (b \to s γ)$ and $Z \rightarro…

hep-ph1993★ 221 cited

"Large $(g - 2)_{μ}$ in SU(5)xU(1) supergravity models"

J. Lopez, D. Nanopoulos, X. Wang

We compute the supersymmetric contribution to the anomalous magnetic moment of the muon within the context of $S U (5) \times U (1)$ supergravity models. The largest possible contribut…

hep-ph1993★ 40 cited

The strongest experimental constraints on SU(5)xU(1) supergravity models

J. Lopez, D. Nanopoulos, G. Park +1

We consider a class of well motivated string-inspired flipped $S U (5)$ supergravity models which include four supersymmetry breaking scenarios: no-scale, strict no-scale, dilaton, a…

hep-ph1993★ 35 cited

Towards a unified string supergravity model

J. Lopez, D. Nanopoulos, A. Zichichi

We present a unified string supergravity model based on a string-derived $S U (5) \times U (1)$ model and a string-inspired supersymmetry breaking scenario triggered by the $F$ -term of…

hep-ph1993★ 29 cited

LEP and radiative electroweak breaking close the light gluino window

J. Lopez, D. Nanopoulos, X. Wang

We show that the LEP lower bound on the chargino mass, in conjunction with the well motivated theoretical requirement of radiative electroweak symmetry breaking, imply an upper bou…

hep-ph1993★ 17 cited

Precision Electroweak Tests of the Minimal and Flipped SU(5) Supergravity Models

J. Lopez, D. V. Nanopoulos, G. Park +2

We explore the one-loop electroweak radiative corrections in the minimal $S U (5)$ and the no-scale flipped $S U (5)$ supergravity models via explicit calculation of vacuum polarizatio…

hep-ph1993★ 58 cited

Probing supergravity models with the $b \to s γ$ microscope

J. Lopez, D. Nanopoulos, G. Park

We present a calculation of the branching ratio $\brbsg$ in two well motivated supersymmetric models: the minimal $S U (5)$ and the no-scale flipped $S U (5)$ supergravity models. We f…

hep-ph1993★ 9 cited

SUSY signals at HERA in the no-scale flipped SU(5) supergravity model

J. Lopez, D. Nanopoulos, X. Wang +1

Sparticle production and detection at HERA are studied within the recently proposed no-scale flipped $S U (5)$ supergravity model. Among the various reaction channels that could lead…

hep-ph1993★ 44 cited

Accurate Neutralino Relic Density Computations in Supergravity Models

J. Lopez, D. Nanopoulos, K. Yuan

We investigate the question of the proper thermal averaging of neutralino annihilation amplitudes which possess poles and thresholds, as they impact on the calculated neutralino re…

hep-ph1993★ 52 cited

Flipped Angles and Phases: A Systematic Study

J. Ellis, J. Lopez, D. Nanopoulos +1

We discuss systematically the fermion mass and mixing matrices in a generic \linebreak field-theoretical flipped $S U (5)$ model, with particular applications to neutrino and baryon…

hep-ph1993★ 39 cited

Higgs-Boson Decay to Four Fermions Including a Single Top Quark Below $t t ˉ$ Threshold

Heath Pois, Thomas J. Weiler, Tzu Chiang Yuan

The rare decay modes Higgs $\to$ four light fermions, and Higgs $\to$ single top-quark + three light fermions for $m_{t} < M_{H} < 2 m_{t}$ , are presented, and phenomenologica…

hep-ph1993★ 67 cited

Perturbative QCD data are consistent with light gluinos

J. Ellis, D. Nanopoulos, D. Ross

We discuss systematically the consistency of light gluinos with data on perturbative QCD from deep inelastic scattering, quarkonia, jets at LEP, and the total hadronic cross-sectio…

hep-ph1993★ 27 cited

Sparticle and Higgs Production and Detection at LEPII in two Supergravity Models

J. Lopez, D. Nanopoulos, H. Pois +2

We study the most promising signals for supersymmetry at LEPII in the context of two well motivated supergravity models: (i) the minimal $S U (5)$ supergravity model including the st…

hep-ph1993★ 2 cited

Boson Pair Productions In $e^{+}$ $e^{-}$ Annihilation

T. K. Kuo, Gye T. Park, M. Zralek

We examine the processes $e^{+} e^{-} ⟶ W^{+} W^{-}$ and $Z^{0} Z^{0}$ in the context of the $S P (6)_{L} \otimes U (1)_{Y}$ model. We find that there are significant deviations in the to…

hep-ph1993★ 34 cited

Improved LEP lower bound on the lightest SUSY Higgs mass from Radiative Electroweak Breaking and its Experimental Consequences

J. Lopez, D. Nanopoulos, H. Pois +2

We show that the present LEPI lower bound on the Standard Model Higgs boson mass ($M_H\gsim60\GeV$) applies as well to the lightest Higgs boson ( $h$ ) of the minimal $S U (5)$ and no-…

hep-ph1993

The Electroweak Phase Transition in Minimal Supergravity Models

D. V. Nanopoulos, H. Pois

We have explored the electroweak phase transition in minimal supergravity models by extending previous analysis of the one-loop Higgs potential to include finite temperature effect…