The Graviton as a Bound State and the Cosmological Constant Problem
نویسنده
چکیده
The graviton is pictured as a bound state of a fermion and antifermion with the spacetime metric assumed to be a composite object of spinor fields, based on a globally Lorentz invariant action proposed by Hebecker and Wetterich. The additional degrees of freedom beyond those of the graviton are described by Goldstone boson gravitational degrees of freedom. If we assume that the fermion is a light neutrino with mass mν ∼ 10−3 eV, then we obtain the vacuum density ρλ ∼ (10−3 eV )4, which agrees with the estimates for the cosmological constant from WMAP and SNIa data. e-mail: [email protected]
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