Scalar tilt from broken conformal invariance

Details Scalar tilt from broken conformal invariance Scalar tilt from broken conformal invariance

2010-07-20

arxiv.org/abs/1007.3417v1

JETP Lett.93:52-55,2011

Physics

High Energy Physics

High Energy Physics - Theory

Scientific paper

10.1134/S002136401102010X

Within recently proposed scenario which explains flatness of the spectrum of scalar cosmological perturbations by a combination of conformal and global symmetries, we discuss the effect of weak breaking of conformal invariance. We find that the scalar power spectrum obtains a small tilt which depends on both the strength of conformal symmetry breaking and the law of evolution of the scale factor.

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