Gravitational leptogenesis in natural inflation

Alexandros Papageorgiou; Marco Peloso

doi:10.1088/1475-7516/2017/12/007

Gravitational leptogenesis in natural inflation

Alexandros Papageorgiou, Marco Peloso

Physics and Astronomy (Twin Cities)

Research output: Contribution to journal › Article › peer-review

16 Scopus citations

Abstract

We compute the gravitational leptogenesis generated from the parity-violating gravitational waves sourced by an abelian gauge field coupled to a pseudo-scalar inflation. We show that, once the CMB bound on the tensor-to-scalar ratio is enforced, the lepton asymmetry produced by this mechanism during inflation is too small to account for the observed baryon asymmetry of the universe, irrespectively of the inflaton potential, the strength of its coupling to the gauge field, and the details of reheating.

Original language	English (US)
Article number	007
Journal	Journal of Cosmology and Astroparticle Physics
Volume	2017
Issue number	12
DOIs	https://doi.org/10.1088/1475-7516/2017/12/007
State	Published - Dec 5 2017

Bibliographical note

Funding Information:
We thank Robert Caldwell for useful discussions. The work of A.P. was partially supported by a summer grant from the graduate program of the School of Astronomy and Physics of the University of Minnesota. The work of M.P. is partially supported from the DOE grant DE-SC0011842 at the University of Minnesota.

Publisher Copyright:
© 2017 IOP Publishing Ltd and Sissa Medialab.

Keywords

Cosmological perturbation theory
Inflation
Leptogenesis

Publisher link

10.1088/1475-7516/2017/12/007

Find It

Find It at U of M Libraries

Cite this

@article{80805c8ea34247b289dc9c6a1dc82b9c,

title = "Gravitational leptogenesis in natural inflation",

abstract = "We compute the gravitational leptogenesis generated from the parity-violating gravitational waves sourced by an abelian gauge field coupled to a pseudo-scalar inflation. We show that, once the CMB bound on the tensor-to-scalar ratio is enforced, the lepton asymmetry produced by this mechanism during inflation is too small to account for the observed baryon asymmetry of the universe, irrespectively of the inflaton potential, the strength of its coupling to the gauge field, and the details of reheating.",

keywords = "Cosmological perturbation theory, Inflation, Leptogenesis",

author = "Alexandros Papageorgiou and Marco Peloso",

note = "Funding Information: We thank Robert Caldwell for useful discussions. The work of A.P. was partially supported by a summer grant from the graduate program of the School of Astronomy and Physics of the University of Minnesota. The work of M.P. is partially supported from the DOE grant DE-SC0011842 at the University of Minnesota. Publisher Copyright: {\textcopyright} 2017 IOP Publishing Ltd and Sissa Medialab.",

year = "2017",

month = dec,

day = "5",

doi = "10.1088/1475-7516/2017/12/007",

language = "English (US)",

volume = "2017",

journal = "Journal of Cosmology and Astroparticle Physics",

issn = "1475-7516",

publisher = "IOP Publishing Ltd.",

number = "12",

}

TY - JOUR

T1 - Gravitational leptogenesis in natural inflation

AU - Papageorgiou, Alexandros

AU - Peloso, Marco

N1 - Funding Information: We thank Robert Caldwell for useful discussions. The work of A.P. was partially supported by a summer grant from the graduate program of the School of Astronomy and Physics of the University of Minnesota. The work of M.P. is partially supported from the DOE grant DE-SC0011842 at the University of Minnesota. Publisher Copyright: © 2017 IOP Publishing Ltd and Sissa Medialab.

PY - 2017/12/5

Y1 - 2017/12/5

N2 - We compute the gravitational leptogenesis generated from the parity-violating gravitational waves sourced by an abelian gauge field coupled to a pseudo-scalar inflation. We show that, once the CMB bound on the tensor-to-scalar ratio is enforced, the lepton asymmetry produced by this mechanism during inflation is too small to account for the observed baryon asymmetry of the universe, irrespectively of the inflaton potential, the strength of its coupling to the gauge field, and the details of reheating.

AB - We compute the gravitational leptogenesis generated from the parity-violating gravitational waves sourced by an abelian gauge field coupled to a pseudo-scalar inflation. We show that, once the CMB bound on the tensor-to-scalar ratio is enforced, the lepton asymmetry produced by this mechanism during inflation is too small to account for the observed baryon asymmetry of the universe, irrespectively of the inflaton potential, the strength of its coupling to the gauge field, and the details of reheating.

KW - Cosmological perturbation theory

KW - Inflation

KW - Leptogenesis

UR - http://www.scopus.com/inward/record.url?scp=85039868855&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85039868855&partnerID=8YFLogxK

U2 - 10.1088/1475-7516/2017/12/007

DO - 10.1088/1475-7516/2017/12/007

M3 - Article

AN - SCOPUS:85039868855

SN - 1475-7516

VL - 2017

JO - Journal of Cosmology and Astroparticle Physics

JF - Journal of Cosmology and Astroparticle Physics

IS - 12

M1 - 007

ER -

Gravitational leptogenesis in natural inflation

Abstract

Bibliographical note

Keywords

Publisher link

Find It

Other files and links

Fingerprint

Cite this