Towards a Dark Sector Model from String Theory

Abstract

An embedding of a unified dark sector model into string theory with the following features is proposed: The model-independent axion descending from the Kalb-Ramond 2-form field is identified with the dark-matter field, and the real part of a Kähler modulus field -- the ``radius'' of one of the extra spatial dimensions -- accounts for dark energy. The expectation value of the dilaton field is stabilized by a gaugino condensation mechanism. A dark-energy potential corresponding to a realistic low energy scale results from some gentle tuning of the stabilized expectation value of the dilaton. The resulting potential reproduces the one in a previous dark-sector model proposed by two of us.

21 pages; construction slightly refined, references added

References in corpus (5)

• Cosmology and the Fate of Dilatation Symmetry
• From Linear SUSY to Constrained Superfields
• Systematics of String Loop Corrections in Type IIB Calabi-Yau Flux Compactifications
• Quintessence and the Swampland: The parametrically controlled regime of moduli space
• Quintessence and the Swampland: The numerically controlled regime of moduli space

Cited by in corpus (4)

• Addressing the Hubble and $S_8$ Tensions with a Kinetically Mixed Dark Sector
• Periodical orbits and waveforms with spontaneous Lorentz symmetry-breaking in Kalb-Ramond gravity
• Gravitational Waves in Chern-Simons-Gauss-Bonnet Gravity
• After the Dark Ages