A Naturally Minute Quantum Correction to the Cosmological Constant Descended from the Hierarchy

Details A Naturally Minute Quantum Correction to the Cosmological Constant Descended from the Hierarchy A Naturally Minute Quantum Correction to the Cosmological Constant Descended from the Hierarchy

2010-05-11

arxiv.org/abs/1005.1920v3

Phys.Rev.D82:126012,2010

Physics

High Energy Physics

High Energy Physics - Theory

5 pages

Scientific paper

10.1103/PhysRevD.82.126012

We demonstrate that an extremely small but positive quantum correction, or the Casimir energy, to the cosmological constant can arise from a massive bulk fermion field in the Randall-Sundrum model. Specifically, a cosmological constant doubly descended from the Planck-electroweak hierarchy and as minute as the observed dark energy scale can be naturally achieved without fine-tuning of the bulk fermion mass. To ensure the stabilization of the system, we discuss two stabilization mechanisms under this setup. It is found that the Goldberger-Wise mechanism can be successfully introduced in the presence of a massive bulk fermion, without spoiling the smallness of the quantum correction.

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