Helical Phase Inflation and Monodromy in Supergravity Theory
Abstract
We study helical phase inflation which realizes “monodromy inflation” in supergravity theory. In the model, inflation is driven by the phase component of a complex field whose potential possesses helicoid structure. We construct phase monodromy based on explicitly breaking global $U\left(1\right)$ symmetry in the superpotential. By integrating out heavy fields, the phase monodromy from single complex scalar field is realized and the model fulfills natural inflation. The phaseaxion alignment is achieved from explicitly symmetry breaking and gives superPlanckian phase decay constant. The $F$ term scalar potential provides strong field stabilization for all the scalars except inflaton, which is protected by the approximate global $U\left(1\right)$ symmetry. Besides, we show that helical phase inflation can be naturally realized in noscale supergravity with $SU\left(\mathrm{2,1}\right)/SU\left(2\right)\times U\left(1\right)$ symmetry since the supergravity setup needed for phase monodromy is automatically provided in the noscale Kähler potential. We also demonstrate that helical phase inflation can be reduced to another wellknown supergravity inflation model with shift symmetry. Helical phase inflation is free from the UVsensitivity problem although there is superPlanckian field excursion, and it suggests that inflation can be effectively studied based on supersymmetric field theory while a UVcompleted framework is not prerequisite.
 Authors:

 State Key Laboratory of Theoretical Physics and Kavli Institute for Theoretical Physics China (KITPC), Institute of Theoretical Physics, Chinese Academy of Sciences, Beijing 100190, China, School of Physical Electronics, University of Electronic Science and Technology of China, Chengdu 610054, China
 George P. and Cynthia W. Mitchell Institute for Fundamental Physics and Astronomy, Texas A&M University, College Station, TX 77843, USA
 George P. and Cynthia W. Mitchell Institute for Fundamental Physics and Astronomy, Texas A&M University, College Station, TX 77843, USA, Astroparticle Physics Group, Houston Advanced Research Center (HARC), Mitchell Campus, The Woodlands, TX 77381, USA, Division of Natural Sciences, Academy of Athens, 28 Panepistimiou Avenue, 10679 Athens, Greece
 Publication Date:
 Sponsoring Org.:
 USDOE
 OSTI Identifier:
 1228449
 Grant/Contract Number:
 FG0395ER40917
 Resource Type:
 Published Article
 Journal Name:
 Advances in High Energy Physics
 Additional Journal Information:
 Journal Name: Advances in High Energy Physics Journal Volume: 2015; Journal ID: ISSN 16877357
 Publisher:
 Hindawi Publishing Corporation
 Country of Publication:
 Egypt
 Language:
 English
Citation Formats
Li, Tianjun, Li, Zhijin, and Nanopoulos, Dimitri V. Helical Phase Inflation and Monodromy in Supergravity Theory. Egypt: N. p., 2015.
Web. doi:10.1155/2015/397410.
Li, Tianjun, Li, Zhijin, & Nanopoulos, Dimitri V. Helical Phase Inflation and Monodromy in Supergravity Theory. Egypt. doi:https://doi.org/10.1155/2015/397410
Li, Tianjun, Li, Zhijin, and Nanopoulos, Dimitri V. Thu .
"Helical Phase Inflation and Monodromy in Supergravity Theory". Egypt. doi:https://doi.org/10.1155/2015/397410.
@article{osti_1228449,
title = {Helical Phase Inflation and Monodromy in Supergravity Theory},
author = {Li, Tianjun and Li, Zhijin and Nanopoulos, Dimitri V.},
abstractNote = {We study helical phase inflation which realizes “monodromy inflation” in supergravity theory. In the model, inflation is driven by the phase component of a complex field whose potential possesses helicoid structure. We construct phase monodromy based on explicitly breaking global U ( 1 ) symmetry in the superpotential. By integrating out heavy fields, the phase monodromy from single complex scalar field is realized and the model fulfills natural inflation. The phaseaxion alignment is achieved from explicitly symmetry breaking and gives superPlanckian phase decay constant. The F term scalar potential provides strong field stabilization for all the scalars except inflaton, which is protected by the approximate global U ( 1 ) symmetry. Besides, we show that helical phase inflation can be naturally realized in noscale supergravity with S U ( 2,1 ) / S U ( 2 ) × U ( 1 ) symmetry since the supergravity setup needed for phase monodromy is automatically provided in the noscale Kähler potential. We also demonstrate that helical phase inflation can be reduced to another wellknown supergravity inflation model with shift symmetry. Helical phase inflation is free from the UVsensitivity problem although there is superPlanckian field excursion, and it suggests that inflation can be effectively studied based on supersymmetric field theory while a UVcompleted framework is not prerequisite.},
doi = {10.1155/2015/397410},
journal = {Advances in High Energy Physics},
number = ,
volume = 2015,
place = {Egypt},
year = {2015},
month = {1}
}
DOI: https://doi.org/10.1155/2015/397410
Web of Science