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The strongest experimental constraints on SU(5) x U(1) supergravity models
/ Lopez, Jorge L. (Texas A-M ; HARC, Woodlands) ; Nanopoulos, Dimitri V. (Texas A-M ; HARC, Woodlands ; CERN) ; Park, Gye T. (Texas A-M ; HARC, Woodlands) ; Zichichi, A. (CERN)
We consider a class of well motivated string-inspired flipped $SU(5)$ supergravity models which include four supersymmetry breaking scenarios: no-scale, strict no-scale, dilaton, and special dilaton, such that only three parameters are needed to describe all new phenomena $(m_t,\tan\beta,m_{\tilde g})$. We show that the LEP precise measurements of the electroweak parameters in the form of the $\epsilon_1$ variable, and the CLEOII allowed range for $\bsg$ are at present the most important experimental constraints on this class of models. [...]
hep-ph/9308266; CTP-TAMU-40-93; ACT-15-93; CERN-TH-6979-93; ACT-1993-15; CERN-TH-6979-93; CTP-TAMU-93-40.-
Houston, TX : Houston Univ. Adv. Res. Cent. The Woodlands, 1994 - 23 p.
- Published in : Phys. Rev. D 49 (1994) 355-365
APS Published version, local copy: PDF; Access to fulltext document: PS.GZ; Preprint: PDF;
- CERN library copies
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Simplest, string-derivable, supergravity model and its experimental predictions
/ Lopez, Jorge L. (Texas A-M ; HARC, Woodlands) ; Nanopoulos, Dimitri V. (Texas A-M ; HARC, Woodlands ; CERN) ; Zichichi, A. (CERN)
We present the simplest, string-derivable, supergravity model and discuss its experimental consequences. This model is a new string-inspired flipped $SU(5)$ which unifies at the string scale $M_U=10~{18}\GeV$ due to the introduction of an additional pair of \r{10},\rb{10} flipped $SU(5)$ representations which contain new intermediate scale `gap' particles. [...]
hep-ph/9210280; CERN-TH-6667-92; CTP-TAMU-68-92; ACT-20-92; CERN-PPE-92-188; CERN-LAA-92-022; ACT-1992-20; CERN-LAA-92-022; CERN-PPE-92-188; CERN-TH-6667-92; CTP-TAMU-92-68.-
Houston, TX : Houston Univ. Adv. Res. Cent. The Woodlands, 1994 - 32 p.
- Published in : Phys. Rev. D 49 (1994) 343-354
APS Published version, local copy: PDF; Fulltext: PDF;
- Please contact the library if you need to access this document.
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A string no-scale supergravity model and its experimental consequences
/ Lopez, Jorge L. (Texas A-M ; HARC, Woodlands) ; Nanopoulos, Dimitri V. (Texas A-M ; HARC, Woodlands) ; Zichichi, A. (CERN)
We propose a string-derived model based on the gauge group $SU(5)\times U(1)$ which satisfies the stringent constraints from no-scale supergravity, allows gauge coupling unification at the string scale, and entails previously unexplored correlations among various sectors of the model. All supersymmetric observables are given in terms of a single mass parameter with self-consistency of the model determining the rest, including $\tan\beta=2.2-2.3$ and $m_t\approx175\GeV$. [...]
hep-ph/9502414; CTP-TAMU-06-95; ACT-02-95; CTP-TAMU-95-6.-
College Station, TX : Texas A and M Univ. Dept. Phys., 1995 - 10 p.
- Published in : Phys. Rev. D 52 (1995) 4178-4182
APS Published version, local copy: PDF; Access to fulltext document: PDF; Fulltext: PDF; External link: hep-ph/9502414 PDF
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Experimental aspects of $SU(5) X U(1)$ supergravity
/ Lopez, Jorge L. (Texas A-M ; HARC, Woodlands) ; Nanopoulos, Dimitri V. (Texas A-M ; HARC, Woodlands ; CERN) ; Park, Gye T. (Texas A-M ; HARC, Woodlands) ; Wang, Xu (Texas A-M ; HARC, Woodlands) ; Zichichi, A. (CERN)
We study various aspects of $SU(5)\times U(1)$ supergravity as they relate to the experimental verification or falsification of this model. We consider two string-inspired, universal, one-parameter, no-scale soft-supersymmetry-breaking scenarios, driven by the $F$-terms of the moduli and dilaton fields. [...]
hep-ph/9401325; CERN-TH-7139-94; CERN-LAA-94-06; CTP-TAMU-74-93; ACT-26-93; CERN-PPE-94-14; CERN-PPE-94-014; ACT-1993-26; CERN-LAA-94-006; CERN-PPE-94-14; CERN-TH-7139-94; CTP-TAMU-93-74.-
Houston, TX : Houston Univ. Adv. Res. Cent. The Woodlands, 1994 - 69 p.
- Published in : Phys. Rev. D 50 (1994) 2164-2190
APS Published version, local copy: PDF; Fulltext: 9401325.fig7ab - PS.GZ; 9401325.fig6ab - PS.GZ; 9401325.fig2a - PS.GZ; 9401325.fig2b - PS.GZ; 9401325.fig7cd - PS.GZ; 9401325.fig10 - PS.GZ; 9401325.fig11 - PS.GZ; 9401325.fig15 - PS.GZ; 9401325.fig16 - PS.GZ; 9401325.fig17 - PS.GZ; 9401325.fig18 - PS.GZ; 9401325.fig6cd - PS.GZ; 9401325.fig13ab - PS.GZ; 9401325 - PDF; 9401325.fig9ab - PS.GZ; 9401325.fig4b - PS.GZ; 9401325.fig4a - PS.GZ; 9401325.fig8ab - PS.GZ; 9401325.fig19ab - PS.GZ; 9401325.fig1a - PS.GZ; 9401325.fig1b - PS.GZ; 9401325.fig3b - PS.GZ; 9401325.fig3a - PS.GZ; 9401325.fig5a - PS.GZ; 9401325.fig5b - PS.GZ; 9401325.fig14ab - PS.GZ; 9401325.fig21 - PS.GZ; 9401325.fig20 - PS.GZ; 9401325.fig23 - PS.GZ; 9401325.fig22 - PS.GZ; 9401325.fig25 - PS.GZ; 9401325.fig24 - PS.GZ; 9401325.fig12b - PS.GZ; 9401325.fig12a - PS.GZ; Preprint: PDF; External link: hep-ph/9401325 PDF
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Scrutinizing supergravity models through neutrino telescopes
/ Gandhi, Raj (Texas A-M ; HARC, Woodlands) ; Lopez, Jorge L. (Texas A-M ; HARC, Woodlands) ; Nanopoulos, Dimitri V. (Texas A-M ; HARC, Woodlands ; CERN) ; Yuan, Ka-jia (Texas A-M ; HARC, Woodlands) ; Zichichi, A. (CERN)
Galactic halo neutralinos ($\chi$) captured by the Sun or Earth produce high-energy neutrinos as end-products of various annihilation modes. These neutrinos can travel from the Sun or Earth cores to the neighborhood of underground detectors (``neutrino telescopes") where they can interact and produce upwardly-moving muons. [...]
astro-ph/9309048; CERN-TH-6999-93; CTP-TAMU-48-93; ACT-18-93; ACT-1993-18; CERN-TH-6999-93; CTP-TAMU-93-48.-
Houston, TX : Houston Univ. Adv. Res. Cent. The Woodlands, 1994 - 27 p.
- Published in : Phys. Rev. D 49 (1994) 3691-3703
APS Published version, local copy: PDF; Access to fulltext document: 9309048 - PDF; th-6999-93 - PS.GZ; Preprint: PDF; External link: astro-ph/9309048 PDF
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New precision electroweak tests of SU(5) x U(1) supergravity
/ Lopez, Jorge L. (Texas A-M ; HARC, Woodlands) ; Nanopoulos, Dimitri V. (Texas A-M ; HARC, Woodlands ; CERN) ; Park, Gye T. (Texas A-M ; HARC, Woodlands) ; Zichichi, A. (CERN)
We explore the one-loop electroweak radiative corrections in $SU(5)\times U(1)$ supergravity via explicit calculation of vacuum-polarization and vertex-correction contributions to the $\epsilon_1$ and $\epsilon_b$ parameters. Experimentally, these parameters are obtained from a global fit to the set of observables $\Gamma_{l}, \Gamma_{b}, A^{l}_{FB}$, and $M_W/M_Z$. [...]
hep-ph/9311277; CERN-TH-7078-93; CTP-TAMU-68-93; ACT-24-93; ACT-1993-24; CERN-TH-7078-93; CTP-TAMU-93-68.-
Houston, TX : Houston Univ. Adv. Res. Cent. The Woodlands, 1994 - 14 p.
- Published in : Phys. Rev. D 49 (1994) 4835-4841
APS Published version, local copy: PDF; Access to fulltext document: th-7078-93 - PS.GZ; 9311277 - PDF; Fulltext: PDF; External link: hep-ph/9311277 PDF
- Please contact the library if you need to access this document.
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The superworlds of SU(5) and SU(5) x U(1) : a critical assessment and overview
/ López, J L (HARC, Woodlands ; Texas A-M) ; Nanopoulos, Dimitri V (CERN ; HARC, Woodlands ; Texas A-M) ; Zichichi, Antonino (CERN)
We present an overview of the simplest supergravity models which enforce radiative breaking of the electroweak symmetry, namely the minimal $SU(5)$ supergravity model and the class of string-inspired/derived supergravity models based on the flipped $SU(5)\times U(1)$ structure supplemented by a minimal set of additional matter representations such that unification occurs at the string scale ($\sim10^{18}\GeV$). These models can be fully parametrized in terms of the top-quark mass, the ratio $\tan\beta=v_2/v_1$, and three supersymmetry breaking parameters ($m_{1/2},m_0,A$) [...]
hep-ph/9307211; ACT-1993-13; CERN-TH-6934-93; CTP-TAMU-93-34.-
Houston, TX : Houston Univ. Adv. Res. Cent. The Woodlands, 1993 - 58 p.
Fulltext: PDF; External link: Preprint
In : 30th International School of Subnuclear Physics "Ettore Majorana", Erice, Italy, 14 - 20 Jul 1992, pp.311-366
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