TY - JOUR
T1 - Kinetic preheating after α-attractor inflation
AU - Adshead, Peter
AU - Giblin, John T.
AU - Pfaltzgraff-Carlson, Reid
N1 - We thank Mustafa Amin and Zachary Weiner for early conversations regarding kinetic couplings. P.A. and J.T.G. gratefully acknowledge support from the Simons Center for Geometry and Physics, Stony Brook University at which some of the research for this paper was performed. J.T.G. is also grateful for the hospitality of the Illinois Center for Advanced Studies of the Universe at the University of Illinois at which much of this work was conducted. P.A. is supported in part by the United States Department of Energy, DE-SC0015655. J.T.G. and R.P. are supported in part by the National Science Foundation, PHY-2309919. The simulations presented here were carried out at the Ohio Super Computer Center [60].The authors declare the following financial interests/personal relationships which may be considered as potential competing interests: John T. Giblin Jr. reports financial support was provided by National Science Foundation. Peter Adshead reports financial support was provided by US Department of Energy. John T. Giblin Jr. reports financial support was provided by Simons Foundation. Peter Adshead reports financial support was provided by Simons Foundation. If there are other authors, they declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
We thank Mustafa Amin and Zachary Weiner for early conversations regarding kinetic couplings. P.A. and J.T.G. gratefully acknowledge support from the Simons Center for Geometry and Physics, Stony Brook University at which some of the research for this paper was performed. J.T.G. is also grateful for the hospitality of the Illinois Center for Advanced Studies of the Universe at the University of Illinois at which much of this work was conducted. P.A. is supported in part by the United States Department of Energy, DE-SC0015655. J.T.G. and R.P. are supported in part by the National Science Foundation, PHY-2309919. The simulations presented here were carried out at the Ohio Super Computer Center [60] .
PY - 2024/9
Y1 - 2024/9
N2 - We study preheating via kinetic couplings after dilaton-axion α-attractor inflation. We focus on E-model α-attractor driven inflation where the inflaton is kinetically coupled to an ultralight axion. In this class of models, the kinetic coupling is related to the form of the potential, and once the amplitude of the scalar curvature spectrum as well as the tensor-to-scalar ratio are specified, the model has no free parameters. We find that the kinetic couplings can lead to extremely efficient tachyonic preheating, with stronger preheating occurring at parameter values corresponding to smaller values of the tensor-to-scalar ratio. Preheating becomes extremely efficient below r≲1.6×10−5.
AB - We study preheating via kinetic couplings after dilaton-axion α-attractor inflation. We focus on E-model α-attractor driven inflation where the inflaton is kinetically coupled to an ultralight axion. In this class of models, the kinetic coupling is related to the form of the potential, and once the amplitude of the scalar curvature spectrum as well as the tensor-to-scalar ratio are specified, the model has no free parameters. We find that the kinetic couplings can lead to extremely efficient tachyonic preheating, with stronger preheating occurring at parameter values corresponding to smaller values of the tensor-to-scalar ratio. Preheating becomes extremely efficient below r≲1.6×10−5.
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U2 - 10.1016/j.physletb.2024.138928
DO - 10.1016/j.physletb.2024.138928
M3 - Article
AN - SCOPUS:85200909799
SN - 0370-2693
VL - 856
JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
M1 - 138928
ER -