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

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

1999-07-28

arxiv.org/abs/hep-ph/9907528v3

JHEP 0006 (2000) 016

Physics

High Energy Physics

High Energy Physics - Phenomenology

LaTex file of 11 pages

Scientific paper

10.1088/1126-6708/2000/06/016

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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