Modeling the small dark energy scale with a quintessential pseudoscalar boson

作者：Kim Jihn E^*

来源：Journal of the Korean Physical Society, 2014, 64(6): 795-805.

DOI：10.3938/jkps.64.795

• Dark energy
• Quintessential pseudoscalar
• Discrete symmetry S-2 x S-2

Democracy among the same type of particles is a useful paradigm in studying masses and interactions of particles with supersymmetry (SUSY) or without SUSY. This simple idea predicts the presence of massless particles. We attempt to use one of these massless pseudoscalar particles to generate the cosmological dark energy (DE) potential. To achieve the extremely shallow potential of DE, we require the pseudoscalar boson not couple to quantum chromodynamics (QCD) anomaly. Thus, we consider two pseudoscalars, one coupling to the QCD anomaly (i.e., the QCD axion) and the other not coupling to the QCD anomaly. To obtain these two pseudoscalars, we introduce two approximate global U(1) symmetries to realize them as the pseudo-Goldstone bosons of the spontaneously broken U(1) symmetries. These global symmetries are dictated by a gravity-respecting discrete symmetry. Specifically, we consider an S (2)(L) x S (2)(R) x Z (10R) example and attempt to obtain the DE scale in terms of two observed fundamental mass scales, the grand unification scale M (G) and the electroweak scale upsilon (ew).

• 出版日期2014-3