Effective search templates for a primordial stochastic gravitational wave background

Journal Article · Wed Aug 15 00:00:00 EDT 2007 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.76.043516· OSTI ID:21027581

Chiba, Takeshi; Himemoto, Yoshiaki; Yamaguchi, Masahide; Yokoyama, Jun'ichi ^[1]

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1. Department of Physics, College of Humanities and Sciences, Nihon University, Tokyo 156-8550 (Japan)

We calculate the signal-to-noise ratio (SNR) of the stochastic gravitational-wave background in an extreme case that its spectrum has a sharp falloff with its amplitude close to the detection threshold. Such a spectral feature is a characteristic imprint of the change in the number of relativistic degrees of freedom on the stochastic background generated during inflation in the early Universe. We find that, although SNR is maximal with the correct template which is proportional to the assumed real spectrum, its sensitivity to the shape of template is fairly weak indicating that a simple power-law template is sufficient to detect the signature.

• OSTI ID: 21027581
• Journal Information: Physical Review. D, Particles Fields, Vol. 76, Issue 4; Other Information: DOI: 10.1103/PhysRevD.76.043516; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ACCELERATION
AMPLITUDES
COSMOLOGY
DEGREES OF FREEDOM
DETECTION
GRAVITATION
GRAVITATIONAL WAVES
INFLATIONARY UNIVERSE
RELATIVISTIC RANGE
SENSITIVITY
SIGNAL-TO-NOISE RATIO
STOCHASTIC PROCESSES
UNIVERSE