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Title: A family-universal anomalous U(1) in string models as the origin of supersymmetry breaking and squark degeneracy

Abstract

Recently a promising mechanism for supersymmetry breaking that utilizes both an anomalous U(1) gauge symmetry and an effective mass term m {approx} 1TeV of certain relevant fields has been proposed. In this paper we examine whether such a mechanism can emerge in superstring derived free fermionic models. We observe that certain three generation string solutions, though not all, lead to an anomalous U(1) which couples universally to all three families. The advantages of this three-family universality of U(1){sub A}, compared to the two-family case, proposed in earlier works, in yielding squark degeneracy, while avoiding radiative breaking of color and charge, are noted. The root cause of the flavor universality of U(1){sub A} is the cyclic permutation symmetry that characterizes the Z{sub 2} x Z{sub 2} orbifold compactification with standard embedding, realized in the free fermionic models by the NAHE set. It is shown that nonrenormalizable terms which contain hidden-sector condensates, generate the required suppression of the relevant mass term m, compared to the Planck scale. While the D-term of the family universal U(1){sub A} leads to squark degeneracy, those of the family dependent U(1)`s, remarkably enough, are found to vanish for the solutions considered, owing to minimization of the potential.

Authors:
 [1];  [2]
  1. Univ. of Florida, Gainesville, FL (United States). Dept. of Physics
  2. Univ. of Maryland, College Park, MD (United States). Dept. of Physics
Publication Date:
Research Org.:
Florida Univ., Gainesville, FL (United States). Inst. for Fundamental Theory
Sponsoring Org.:
USDOE Office of Energy Research, Washington, DC (United States)
OSTI Identifier:
604324
Report Number(s):
DOE/ER/40272-293; UFIFT-HEP-97-29; UMD-PP-98-54; HEP-PH-9
ON: DE98005174; TRN: 98:005511
DOE Contract Number:  
FG05-86ER40272
Resource Type:
Technical Report
Resource Relation:
Other Information: PBD: Dec 1997
Country of Publication:
United States
Language:
English
Subject:
66 PHYSICS; STRING MODELS; SUPERSYMMETRY; SYMMETRY BREAKING; SPARTICLES; QUARKS; U-1 GROUPS

Citation Formats

Faraggi, A E, and Pati, J C. A family-universal anomalous U(1) in string models as the origin of supersymmetry breaking and squark degeneracy. United States: N. p., 1997. Web. doi:10.2172/604324.
Faraggi, A E, & Pati, J C. A family-universal anomalous U(1) in string models as the origin of supersymmetry breaking and squark degeneracy. United States. https://doi.org/10.2172/604324
Faraggi, A E, and Pati, J C. Mon . "A family-universal anomalous U(1) in string models as the origin of supersymmetry breaking and squark degeneracy". United States. https://doi.org/10.2172/604324. https://www.osti.gov/servlets/purl/604324.
@article{osti_604324,
title = {A family-universal anomalous U(1) in string models as the origin of supersymmetry breaking and squark degeneracy},
author = {Faraggi, A E and Pati, J C},
abstractNote = {Recently a promising mechanism for supersymmetry breaking that utilizes both an anomalous U(1) gauge symmetry and an effective mass term m {approx} 1TeV of certain relevant fields has been proposed. In this paper we examine whether such a mechanism can emerge in superstring derived free fermionic models. We observe that certain three generation string solutions, though not all, lead to an anomalous U(1) which couples universally to all three families. The advantages of this three-family universality of U(1){sub A}, compared to the two-family case, proposed in earlier works, in yielding squark degeneracy, while avoiding radiative breaking of color and charge, are noted. The root cause of the flavor universality of U(1){sub A} is the cyclic permutation symmetry that characterizes the Z{sub 2} x Z{sub 2} orbifold compactification with standard embedding, realized in the free fermionic models by the NAHE set. It is shown that nonrenormalizable terms which contain hidden-sector condensates, generate the required suppression of the relevant mass term m, compared to the Planck scale. While the D-term of the family universal U(1){sub A} leads to squark degeneracy, those of the family dependent U(1)`s, remarkably enough, are found to vanish for the solutions considered, owing to minimization of the potential.},
doi = {10.2172/604324},
url = {https://www.osti.gov/biblio/604324}, journal = {},
number = ,
volume = ,
place = {United States},
year = {1997},
month = {12}
}