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Dynamical breaking of shift-symmetry and super-Planckian inflation

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Dynamical breaking of shift-symmetry and super-Planckian inflation. / Mazumdar, Anupam; Noumi, Toshifumi; Yamaguchi, Masahide.
In: Physical Review D, Vol. 90, 043519, 18.08.2014.

Research output: Contribution to Journal/Magazine › Journal article › peer-review

Harvard

Mazumdar, A, Noumi, T & Yamaguchi, M 2014, 'Dynamical breaking of shift-symmetry and super-Planckian inflation', Physical Review D, vol. 90, 043519. https://doi.org/10.1103/PhysRevD.90.043519

APA

Mazumdar, A., Noumi, T., & Yamaguchi, M. (2014). Dynamical breaking of shift-symmetry and super-Planckian inflation. Physical Review D, 90, Article 043519. https://doi.org/10.1103/PhysRevD.90.043519

Vancouver

Mazumdar A, Noumi T, Yamaguchi M. Dynamical breaking of shift-symmetry and super-Planckian inflation. Physical Review D. 2014 Aug 18;90:043519. doi: 10.1103/PhysRevD.90.043519

Author

Mazumdar, Anupam ; Noumi, Toshifumi ; Yamaguchi, Masahide. / Dynamical breaking of shift-symmetry and super-Planckian inflation. In: Physical Review D. 2014 ; Vol. 90.

Bibtex

@article{32836669d2b6486fb827b1997a749de6,
title = "Dynamical breaking of shift-symmetry and super-Planckian inflation",
abstract = "Shift-symmetry is essential to protect the flatness of the potential, even beyond the super-Planckian vacuum expectation value (VEV) for an inflaton field. The breaking of the shift-symmetry can yield potentials suitable for super-Planckian excursion of the inflaton. The aim of this paper is to illustrate that it is indeed possible to break the shift-symmetry dynamically within 4 dimensional supergravity prior to a long phase of inflation. Thanks to the shift-symmetry, the leading contribution to the inflaton potential is free from the dangerous exponential factor even after its breaking, which is the main obstacle to realizing the super-Planckian inflation in supergravity. But, unfortunately, in a simple model, the potential obtained for the inflaton would be cosine type potential rather than power-law one and it is difficult to realize a super-Planckian breaking scale.",
keywords = "hep-th, astro-ph.CO, gr-qc, hep-ph",
author = "Anupam Mazumdar and Toshifumi Noumi and Masahide Yamaguchi",
note = "{\textcopyright} 2014 American Physical Society",
year = "2014",
month = aug,
day = "18",
doi = "10.1103/PhysRevD.90.043519",
language = "English",
volume = "90",
journal = "Physical Review D",
issn = "1550-7998",
publisher = "American Physical Society",

}

RIS

TY - JOUR

T1 - Dynamical breaking of shift-symmetry and super-Planckian inflation

AU - Mazumdar, Anupam

AU - Noumi, Toshifumi

AU - Yamaguchi, Masahide

N1 - © 2014 American Physical Society

PY - 2014/8/18

Y1 - 2014/8/18

N2 - Shift-symmetry is essential to protect the flatness of the potential, even beyond the super-Planckian vacuum expectation value (VEV) for an inflaton field. The breaking of the shift-symmetry can yield potentials suitable for super-Planckian excursion of the inflaton. The aim of this paper is to illustrate that it is indeed possible to break the shift-symmetry dynamically within 4 dimensional supergravity prior to a long phase of inflation. Thanks to the shift-symmetry, the leading contribution to the inflaton potential is free from the dangerous exponential factor even after its breaking, which is the main obstacle to realizing the super-Planckian inflation in supergravity. But, unfortunately, in a simple model, the potential obtained for the inflaton would be cosine type potential rather than power-law one and it is difficult to realize a super-Planckian breaking scale.

AB - Shift-symmetry is essential to protect the flatness of the potential, even beyond the super-Planckian vacuum expectation value (VEV) for an inflaton field. The breaking of the shift-symmetry can yield potentials suitable for super-Planckian excursion of the inflaton. The aim of this paper is to illustrate that it is indeed possible to break the shift-symmetry dynamically within 4 dimensional supergravity prior to a long phase of inflation. Thanks to the shift-symmetry, the leading contribution to the inflaton potential is free from the dangerous exponential factor even after its breaking, which is the main obstacle to realizing the super-Planckian inflation in supergravity. But, unfortunately, in a simple model, the potential obtained for the inflaton would be cosine type potential rather than power-law one and it is difficult to realize a super-Planckian breaking scale.

KW - hep-th

KW - astro-ph.CO

KW - gr-qc

KW - hep-ph

U2 - 10.1103/PhysRevD.90.043519

DO - 10.1103/PhysRevD.90.043519

M3 - Journal article

VL - 90

JO - Physical Review D

JF - Physical Review D

SN - 1550-7998

M1 - 043519

ER -