https://doi.org/10.1140/epjc/s10052-017-4874-x
Regular Article - Theoretical Physics
Broken scale invariance, 
-attractors and vector impurity
Department of Physics, Istanbul Technical University, Maslak, 34469, Istanbul, Turkey
* e-mail: akarsuo@itu.edu.tr
Received:
7
November
2016
Accepted:
1
May
2017
Published online:
13
May
2017
We show that if the -attractor model is realized by the spontaneous breaking of the scale symmetry, then the stability and the dynamics of the vector field that gauges the scale symmetry can severely constrain the -parameter as 
restricting the inflationary predictions in a very tiny region in the 
plane that are in great agreement with the latest Planck data. Although the different values of do not make a tangible difference for 
and r, they provide radically different scenarios for the post-inflationary dynamics which determines the standard BBN processes and the large scale isotropy of the universe.
© The Author(s), 2017
