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arXiv · hep-ph/9907528

Model-dependent Axion as Quintessence with Almost Massless Hidden Sector Quarks

Jihn E. Kim
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Abstract

A pseudo-Goldstone boson for {\it quintessence} is known to require the decay constant $F_q\sim M_P$ and the height of the potential $(0.003 {\rm eV})^4$, and hence the pseudo-Goldstone boson mass of order $10^{-33}$ eV. The model-dependent axion in some superstring models is suggested as a good candidate for the quintessence. We realize this idea with a hidden-sector gauge group $SU(3)_H\times U(1)_H$. The hidden-sector instanton contribution to the quintessence potential is suppressed by the almost massless hidden-sector quarks. The model-independent axion is the QCD axion required for the strong CP solution.

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Jihn E. Kim. 2000-06-29. Model-dependent Axion as Quintessence with Almost Massless Hidden Sector Quarks. https://doi.org/10.1088/1126-6708%2F2000%2F06%2F016

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