https://doi.org/10.1140/epjc/s10052-016-4226-2
Regular Article - Theoretical Physics
About the isocurvature tension between axion and high scale inflationary models
1
CONICET-International Center for Advances Studies (ICAS), UNSAM, Campus Miguelete 25 de Mayo y Francia, Buenos Aires, 1650, Argentina
2
CONICET-Instituto de Física de Buenos Aires (IFIBA), Pabellón I Ciudad Universitaria, C. A. B. A, Buenos Aires, 1428, Argentina
3
CONICET-Instituto de Matemáticas Luis Santaló (IMAS), Pabellón I Ciudad Universitaria, C. A. B. A, Buenos Aires, 1428, Argentina
* e-mail: firenzecita@hotmail.com
** e-mail: osantil@dm.uba.ar
Received:
9
November
2015
Accepted:
23
June
2016
Published online:
14
July
2016
The present work suggests that the isocurvature tension between axion and high energy inflationary scenarios may be avoided by considering a double field inflationary model involving the hidden Peccei–Quinn Higgs and the Standard Model one. Some terms in the lagrangian we propose explicitly violate the Peccei–Quinn symmetry but, at the present era, their effect is completely negligible. The resulting mechanism allows for a large value for the axion constant, of the order 
, thus the axion isocurvature fluctuations are suppressed even when the scale of inflation 
is very high, of the order of 
. This numerical value is typical in Higgs inflationary models. An analysis about topological defect formation in this scenario is also performed, and it is suggested that, under certain assumptions, their effect is not catastrophic from the cosmological point of view.
© The Author(s), 2016
