Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
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TY - JOUR
T1 - Parity Violating Statistical Anisotropy
AU - Dimopoulos, Konstantinos
AU - Karciauskas, Mindaugas
PY - 2012/6/6
Y1 - 2012/6/6
N2 - Particle production of an Abelian vector boson field with an axial coupling is investigated. The conditions for the generation of scale invariant spectra for the vector field transverse components are obtained. If the vector field contributes to the curvature perturbation in the Universe, scale-invariant particle production enables it to give rise to statistical anisotropy in the spectrum and bispectrum of cosmological perturbations. The axial coupling allows particle production to be parity violating, which in turn can generate parity violating signatures in the bispectrum. The conditions for parity violation are derived and the observational signatures are obtained in the context of the vector curvaton paradigm. Two concrete examples are presented based on realistic particle theory.
AB - Particle production of an Abelian vector boson field with an axial coupling is investigated. The conditions for the generation of scale invariant spectra for the vector field transverse components are obtained. If the vector field contributes to the curvature perturbation in the Universe, scale-invariant particle production enables it to give rise to statistical anisotropy in the spectrum and bispectrum of cosmological perturbations. The axial coupling allows particle production to be parity violating, which in turn can generate parity violating signatures in the bispectrum. The conditions for parity violation are derived and the observational signatures are obtained in the context of the vector curvaton paradigm. Two concrete examples are presented based on realistic particle theory.
KW - cosmology
KW - inflation
KW - Cosmology of Theories beyond the SM
KW - String Field Theory
U2 - 10.1007/JHEP06(2012)040
DO - 10.1007/JHEP06(2012)040
M3 - Journal article
VL - 2012
JO - Journal of High Energy Physics
JF - Journal of High Energy Physics
IS - 6
M1 - JHEP06(2012)040
ER -