Jihn E. Kim

Harmful Axions in Superstring Models

Abstract We show in this paper that the existing superstring models, E 8 ×E 8 and O(32), have the axion decay constant problem. It is either 300 GeV or 10 16 GeV, which are outside the cosmologically allowed region. It is also pointed out that the invisible axion with 10 8 GeV ⩽ v PQ ⩽ 10 12 GeV is a necessity for all theories which have an effective interaction ( φ n / M Pl )FF below the Planck scale.

Constraints on very light axions from cavity experiments

In view of the ongoing galactic (or cosmic) axion detection experiments, we compare the axion-photon-photon coupling

Hidden sector gaugino condensation and the model independent axion

c_{agammagamma}

Composite fermions with a gauge family symmetry and the νe mass

s for various invisible (or very light) axion models.

Global symmetries in duals of supersymmetric SU(N)×SU(M) and application to composite axion

Abstract In the effective field theory framework, we consider the effect of supersymmetry breaking via gaugino condensation and supergravity in the hidden sector gauge group on the hidden sector vacuum angle θ h . The θ h parameter dependence of the potential yields phenomenologically acceptable invisible axion solutions if the U (1) R symmetry is broken down to a discrete subgroup Z N with N ≥3 ( N =4 is marginal). Anomalous U(1) superstring models are good candidates for this invisible axion resolution of the strong CP puzzle.

Supersymmetric interpretation of high-Q2DESY HERA events and other related issues

Abstract The conditions for the absence of the triangle anomaly and the Fritzsch-Dimopoulos form of the fermion mass matrix are applied to Georgis model of composite fermions with the gauged U(1) F family symmetry. New nonstandard fermions with masses ≳ 100 GeV must appear. A remarkable feature of this class of models is that the electron neutrino weighs several tens of eV.

Dark ene rgy f rom app roximate U (1)de symmetry

Abstract In this paper, we construct a supersymmetric composite axion ( c-axion ) model based on the gauge group SU( N )×SU( M ), which is one possible physical application of the N =1 duality. The dual of SU( M ) is interpreted as the color gauge group. We illustrate the existence of c-axion for the case of one dual quark in the dual gauge group SU ( M ) .

Particles, strings, and cosmology : 11th International Symposium on Particles, Strings, and Cosmology, PASCOS 2005, Gyeongju, Korea 30 May-4 June 2005

In the framework of the minimal supersymmetric standard model (MSSM) with

The 11th International Symposium on Particles, Strings and Cosmology

R-

Front Matter for Volume 805

parity violation, the high--