Constraints on gravitino decay and the scale of inflation using CMB spectral distortions

Emanuela Dimastrogiovanni, Lawrence Krauss, Jens Chluba

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

If local supersymmetry is the correct extension of the standard model of particle physics, then following inflation the early Universe would have been populated by gravitinos produced from scatterings in the hot plasma during reheating. Their abundance is directly related to the magnitude of the reheating temperature. The gravitino lifetime is fixed as a function of its mass, and for gravitinos with lifetimes longer than the age of the Universe at redshift z≃2×106 (or roughly 6×106 s), decay products can produce spectral distortion of the cosmic microwave background. Currently available COBE/FIRAS limits on spectral distortion can, in certain cases, already be competitive with respect to cosmological constraints from primordial nucleosynthesis for some gravitino decay scenarios. We show how the sensitivity limits on μ and y distortions that can be reached with current technology will improve constraints and possibly rule out a significant portion of the parameter space for gravitino masses and inflation reheating temperatures.

Original languageEnglish (US)
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volume94
Issue number2
DOIs
StatePublished - Jul 19 2016

Fingerprint

gravitinos
decay
heating
universe
Cosmic Background Explorer satellite
life (durability)
high temperature plasmas
nuclear fusion
supersymmetry
microwaves
physics
temperature
sensitivity
products
scattering

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

Cite this

Constraints on gravitino decay and the scale of inflation using CMB spectral distortions. / Dimastrogiovanni, Emanuela; Krauss, Lawrence; Chluba, Jens.

In: Physical Review D - Particles, Fields, Gravitation and Cosmology, Vol. 94, No. 2, 19.07.2016.

Research output: Contribution to journalArticle

@article{5f49f8cca0f74da18e060dc07c449d76,
title = "Constraints on gravitino decay and the scale of inflation using CMB spectral distortions",
abstract = "If local supersymmetry is the correct extension of the standard model of particle physics, then following inflation the early Universe would have been populated by gravitinos produced from scatterings in the hot plasma during reheating. Their abundance is directly related to the magnitude of the reheating temperature. The gravitino lifetime is fixed as a function of its mass, and for gravitinos with lifetimes longer than the age of the Universe at redshift z≃2×106 (or roughly 6×106 s), decay products can produce spectral distortion of the cosmic microwave background. Currently available COBE/FIRAS limits on spectral distortion can, in certain cases, already be competitive with respect to cosmological constraints from primordial nucleosynthesis for some gravitino decay scenarios. We show how the sensitivity limits on μ and y distortions that can be reached with current technology will improve constraints and possibly rule out a significant portion of the parameter space for gravitino masses and inflation reheating temperatures.",
author = "Emanuela Dimastrogiovanni and Lawrence Krauss and Jens Chluba",
year = "2016",
month = "7",
day = "19",
doi = "10.1103/PhysRevD.94.023518",
language = "English (US)",
volume = "94",
journal = "Physical review D: Particles and fields",
issn = "1550-7998",
publisher = "American Institute of Physics Publising LLC",
number = "2",

}

TY - JOUR

T1 - Constraints on gravitino decay and the scale of inflation using CMB spectral distortions

AU - Dimastrogiovanni, Emanuela

AU - Krauss, Lawrence

AU - Chluba, Jens

PY - 2016/7/19

Y1 - 2016/7/19

N2 - If local supersymmetry is the correct extension of the standard model of particle physics, then following inflation the early Universe would have been populated by gravitinos produced from scatterings in the hot plasma during reheating. Their abundance is directly related to the magnitude of the reheating temperature. The gravitino lifetime is fixed as a function of its mass, and for gravitinos with lifetimes longer than the age of the Universe at redshift z≃2×106 (or roughly 6×106 s), decay products can produce spectral distortion of the cosmic microwave background. Currently available COBE/FIRAS limits on spectral distortion can, in certain cases, already be competitive with respect to cosmological constraints from primordial nucleosynthesis for some gravitino decay scenarios. We show how the sensitivity limits on μ and y distortions that can be reached with current technology will improve constraints and possibly rule out a significant portion of the parameter space for gravitino masses and inflation reheating temperatures.

AB - If local supersymmetry is the correct extension of the standard model of particle physics, then following inflation the early Universe would have been populated by gravitinos produced from scatterings in the hot plasma during reheating. Their abundance is directly related to the magnitude of the reheating temperature. The gravitino lifetime is fixed as a function of its mass, and for gravitinos with lifetimes longer than the age of the Universe at redshift z≃2×106 (or roughly 6×106 s), decay products can produce spectral distortion of the cosmic microwave background. Currently available COBE/FIRAS limits on spectral distortion can, in certain cases, already be competitive with respect to cosmological constraints from primordial nucleosynthesis for some gravitino decay scenarios. We show how the sensitivity limits on μ and y distortions that can be reached with current technology will improve constraints and possibly rule out a significant portion of the parameter space for gravitino masses and inflation reheating temperatures.

UR - http://www.scopus.com/inward/record.url?scp=84979503031&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84979503031&partnerID=8YFLogxK

U2 - 10.1103/PhysRevD.94.023518

DO - 10.1103/PhysRevD.94.023518

M3 - Article

VL - 94

JO - Physical review D: Particles and fields

JF - Physical review D: Particles and fields

SN - 1550-7998

IS - 2

ER -