Adjusting the Cosmological Constant Dynamically: Cosmons and a New Force Weaker Than Gravity
Apr 13, 19878 pages
Published in:
- Phys.Lett.B 195 (1987) 183-190
- Published: 1987
Report number:
- DESY-87-026
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Abstract: (Elsevier)
We argue that the vanishing of the cosmological constant obtains as a result of the dynamics of a new field—the cosmon—which is the Goldstone boson of dilatation invariance, assumed to be broken spontaneously near the Planck scale. The presence of the cosmon, coupled to the fact that scale invariance is anomalous at the quantum level, drives the cosmological constant to zero, provided that the energy-momentum trace is purely anomalous. Furthermore, these quantum anomalies give the cosmon a small mass, giving rise to an intermediate range force (λ⩽10 4 m). We can estimate the effect of the cosmon force between macroscopic matter distributions. The dominant component of the force is attractive, couples to mass and should be weaker than gravity ( α ≈10 −2 −10 −3 ). There is, however, also a repulsive baryon-number-dependent component of calculable strength ( ≈ 1 20 α ) and an even smaller contribution proportional mto Z - N .- gravitation: correction
- model: new interaction
- baryon number: dependence
- invariance: dilation
- spontaneous symmetry breaking
- postulated particle: Goldstone particle
- tensor: energy-momentum
- field theory: scalar
- approximation: effective potential
- cosmological constant
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