Towards a unified string supergravity model

Abstract

We present a unified string supergravity model based on a string-derived $SU(5)\times U(1)$ model and a string-inspired supersymmetry breaking scenario triggered by the $F$-term of the universally present dilaton field. This model can be described by three parameters: $m_t$, $\tan \beta$, and $m_{\tilde{g}}$. We work out the predictions for all sparticle and Higgs masses and discuss the prospects for their detection at the Tevatron, LEPI,II, and HERA. We find that the cosmological neutralino relic density is always within current expectations (\ie, $Ω_χh^2_0\lsim0.9$). We also consider a more constrained version of this supersymmetry breaking scenario where the $B$-term is specified. In this case $\tan \beta$ can be determined ($\tan \beta \approx 1.4-1.6$) and implies $m_t\lsim155\GeV$ and $m_h\lsim91\GeV$. Thus, continuing Tevatron top-quark searches and LEPI,II Higgs searches could probe this restricted scenario completely.

CERN-TH.6903/93, CTP-TAMU-31/93, plain tex with harvmac, 3 figures. A correction is made on the relation between $m_0$ and $m_{1/2}$, numerical results changed significantly. The manuscript ps file and the three ps figures are available via anonymous ftp site tamsun.tamu.edu in directory incoming, filenames: CTP-TAMU-31-93.ps, CTP-TAMU-31-93a.ps, CTP-TAMU-31-93b.ps, CTP-TAMU-31-93c.ps

References in corpus (13)

• Model-Independent Analysis of Soft Terms in Effective Supergravity and in String Theory
• Duality Anomaly Cancellation, Minimal String Unification and the Effective Low-Energy Lagrangian of 4-D Strings
• A Natural Solution to the MU Problem
• The Search for a realistic flipped SU(5) string model
• Aspects of Radiative Electroweak Symmetry Breaking in Supergravity Models
• Phenomenological Implications of Supersymmetry Breaking by the Dilaton
• Probing supergravity models with the $b\to s\gamma$ microscope
• Supersymmetry Tests at Fermilab: A Proposal
• Improved LEP lower bound on the lightest SUSY Higgs mass from Radiative Electroweak Breaking and its Experimental Consequences
• New Constraints on Neutralino Dark Matter in the Supersymmetric Standard Model
• Sparticle and Higgs Production and Detection at LEPII in two Supergravity Models
• Precision Electroweak Tests of the Minimal and Flipped SU(5) Supergravity Models
• SUSY signals at HERA in the no-scale flipped SU(5) supergravity model

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