Cosmological constraints on strongly coupled moduli from cosmic strings

Journal Article · Tue Jun 15 00:00:00 EDT 2010 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.81.123502· OSTI ID:21408037

Sabancilar, Eray ^[1]

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1. Institute of Cosmology, Department of Physics and Astronomy, Tufts University, Medford, Massachusetts 02155 (United States)

Cosmic (super)string loops emit moduli as they oscillate under the effect of their tension. Abundance of such moduli is constrained by diffuse gamma ray background, dark matter, and primordial element abundances if their lifetime is of the order of the relevant cosmic time. It is shown that the constraints on string tension G{mu} and modulus mass m are significantly relaxed for moduli coupling to matter stronger than gravitational strength which appears to be quite generic in large volume and warped compactification scenarios in string theory. It is also shown that thermal production of strongly coupled moduli is not efficient, hence free from constraints. In particular, the strongly coupled moduli in warped and large volume compactification scenarios and the radial modulus in the Randall-Sundrum model are found to be free from the constraints when their coupling constant is sufficiently large.

• OSTI ID: 21408037
• Journal Information: Physical Review. D, Particles Fields, Vol. 81, Issue 12; Other Information: DOI: 10.1103/PhysRevD.81.123502; (c) 2010 The American Physical Society; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
79 ASTROPHYSICS
COSMOLOGY AND ASTRONOMY
COMPACTIFICATION
COSMOLOGICAL MODELS
COUPLING
COUPLING CONSTANTS
ELEMENT ABUNDANCE
EMISSION
GAMMA RADIATION
LIFETIME
MASS
NONLUMINOUS MATTER
STRING MODELS
STRING THEORY
STRONG-COUPLING MODEL
ABUNDANCE
COMPOSITE MODELS
ELECTROMAGNETIC RADIATION
EXTENDED PARTICLE MODEL
IONIZING RADIATIONS
MATHEMATICAL MODELS
MATTER
M-THEORY
PARTICLE MODELS
QUARK MODEL
RADIATIONS