Family universal anomalous U(1) in realistic superstring derived models

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An important issue in supersymmetry phenomenology is the suppression of squarks contributions to Flavor Changing Neutral Currents (FCNC). Recently it was noted that in some free fermionic three generation models the anomalous U(1) is family universal. It was further shown that if the D-term of the U(1){sub A} is the dominant source of supersymmetry breaking, the squark masses are indeed approximately degenerate. In this paper the author discusses the properties of the superstring models that give rise to the flavor universal anomalous U(1). The root cause for the universal U(1){sub A} is the cyclic permutation symmetry, the characteristic property of ... continued below

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16 p.

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Faraggi, A.E. January 1, 1998.

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Description

An important issue in supersymmetry phenomenology is the suppression of squarks contributions to Flavor Changing Neutral Currents (FCNC). Recently it was noted that in some free fermionic three generation models the anomalous U(1) is family universal. It was further shown that if the D-term of the U(1){sub A} is the dominant source of supersymmetry breaking, the squark masses are indeed approximately degenerate. In this paper the author discusses the properties of the superstring models that give rise to the flavor universal anomalous U(1). The root cause for the universal U(1){sub A} is the cyclic permutation symmetry, the characteristic property of the Z{sub 2} X Z{sub 2} orbifold compactification, realized in the free fermionic models by the NAHE set of boundary condition basis vectors. The properties of the three generation models that preserve this cyclic permutation symmetry in the flavor charges are discussed. The cyclic permutation symmetry of the Z{sub 2} x Z{sub 2} orbifold compactification is proposed to be the characteristic property, of phenomenological interest, that distinguishes it from other classes of superstring compactifications.

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16 p.

Notes

INIS; OSTI as DE98005176

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  • Other Information: PBD: Jan 1998

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  • Other: DE98005176
  • Report No.: DOE/ER/40272--295
  • Report No.: UFIFT-HEP--98-5;HEP-PH--9801409
  • Grant Number: FG05-86ER40272
  • DOI: 10.2172/604343 | External Link
  • Office of Scientific & Technical Information Report Number: 604343
  • Archival Resource Key: ark:/67531/metadc689756

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  • January 1, 1998

Added to The UNT Digital Library

  • Aug. 14, 2015, 8:43 a.m.

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  • Nov. 5, 2015, 8:24 p.m.

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Faraggi, A.E. Family universal anomalous U(1) in realistic superstring derived models, report, January 1, 1998; United States. (digital.library.unt.edu/ark:/67531/metadc689756/: accessed November 17, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.