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Cosmological constraints on unparticles as continuous mass particles.

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Cosmological constraints on unparticles as continuous mass particles. / McDonald, John.
In: Journal of Cosmology and Astroparticle Physics, Vol. 2009, No. 3, 16.03.2009, p. 19.

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

Harvard

McDonald, J 2009, 'Cosmological constraints on unparticles as continuous mass particles.', Journal of Cosmology and Astroparticle Physics, vol. 2009, no. 3, pp. 19. https://doi.org/10.1088/1475-7516/2009/03/019

APA

McDonald, J. (2009). Cosmological constraints on unparticles as continuous mass particles. Journal of Cosmology and Astroparticle Physics, 2009(3), 19. https://doi.org/10.1088/1475-7516/2009/03/019

Vancouver

McDonald J. Cosmological constraints on unparticles as continuous mass particles. Journal of Cosmology and Astroparticle Physics. 2009 Mar 16;2009(3):19. doi: 10.1088/1475-7516/2009/03/019

Author

McDonald, John. / Cosmological constraints on unparticles as continuous mass particles. In: Journal of Cosmology and Astroparticle Physics. 2009 ; Vol. 2009, No. 3. pp. 19.

Bibtex

@article{6458b7a171404d7e9292f2dca000576c,
title = "Cosmological constraints on unparticles as continuous mass particles.",
abstract = "We study the cosmological constraints on unparticle interactions and the temperature of the Universe for the case where unparticle states can be modelled as continuous mass particles with lifetime 1s. By considering thermal background quark decay to continuous mass scalars via a scalar operator of dimension dU, we show that the condition that the Universe is not dominated by scalars at nucleosynthesis imposes a lower bound on the scale of the interaction of the unparticle sector, with MU 20−2600 TeV for ΛU 1 TeV, 1.1 ≤ dU ≤ 2.0 and 2 ≤ dBZ ≤ 4. The existence of a long-lived scalar sector also imposes an upper bound on the temperature of the Universe during radiation-domination, which can be as low as a TeV for MU close to its lower bound.",
keywords = "big bang nucleosynthesis, cosmology of theories beyond the SM, physics of the early universe",
author = "John McDonald",
year = "2009",
month = mar,
day = "16",
doi = "10.1088/1475-7516/2009/03/019",
language = "English",
volume = "2009",
pages = "19",
journal = "Journal of Cosmology and Astroparticle Physics",
issn = "1475-7516",
publisher = "IOP Publishing",
number = "3",

}

RIS

TY - JOUR

T1 - Cosmological constraints on unparticles as continuous mass particles.

AU - McDonald, John

PY - 2009/3/16

Y1 - 2009/3/16

N2 - We study the cosmological constraints on unparticle interactions and the temperature of the Universe for the case where unparticle states can be modelled as continuous mass particles with lifetime 1s. By considering thermal background quark decay to continuous mass scalars via a scalar operator of dimension dU, we show that the condition that the Universe is not dominated by scalars at nucleosynthesis imposes a lower bound on the scale of the interaction of the unparticle sector, with MU 20−2600 TeV for ΛU 1 TeV, 1.1 ≤ dU ≤ 2.0 and 2 ≤ dBZ ≤ 4. The existence of a long-lived scalar sector also imposes an upper bound on the temperature of the Universe during radiation-domination, which can be as low as a TeV for MU close to its lower bound.

AB - We study the cosmological constraints on unparticle interactions and the temperature of the Universe for the case where unparticle states can be modelled as continuous mass particles with lifetime 1s. By considering thermal background quark decay to continuous mass scalars via a scalar operator of dimension dU, we show that the condition that the Universe is not dominated by scalars at nucleosynthesis imposes a lower bound on the scale of the interaction of the unparticle sector, with MU 20−2600 TeV for ΛU 1 TeV, 1.1 ≤ dU ≤ 2.0 and 2 ≤ dBZ ≤ 4. The existence of a long-lived scalar sector also imposes an upper bound on the temperature of the Universe during radiation-domination, which can be as low as a TeV for MU close to its lower bound.

KW - big bang nucleosynthesis

KW - cosmology of theories beyond the SM

KW - physics of the early universe

UR - http://www.scopus.com/inward/record.url?scp=65649118916&partnerID=8YFLogxK

U2 - 10.1088/1475-7516/2009/03/019

DO - 10.1088/1475-7516/2009/03/019

M3 - Journal article

VL - 2009

SP - 19

JO - Journal of Cosmology and Astroparticle Physics

JF - Journal of Cosmology and Astroparticle Physics

SN - 1475-7516

IS - 3

ER -