Parity Violating Statistical Anisotropy

被引：0
作者：
Konstantinos Dimopoulos
Mindaugas Karčiauskas
机构：
[1] Lancaster University,Consortium for Fundamental Physics, Physics Department
[2] Universidad de Granada,CAFPE and Departamento de Física Teórica y del Cosmos
来源：
Journal of High Energy Physics | / 2012卷
关键词：
Cosmology of Theories beyond the SM; String Field Theory;
D O I：
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学科分类号：
摘要：
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 vectorcurvaton paradigm. Two concrete examples are presented based on realistic particle theory.
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[1]  
Dimopoulos K(2006)Can a vector field be responsible for the curvature perturbation in the Universe? Phys. Rev. D 74 083502-undefined
[2]  
Dimopoulos K(2012)Statistical anisotropy and the vector curvaton paradigm Int. J. Mod. Phys. D 21 1250023-undefined
[3]  
Mollerach S(1990)Isocurvature baryon perturbations and inflation Phys. Rev. D 42 313-undefined
[4]  
Linde AD(1997)Non-gaussian isocurvature perturbations from inflation Phys. Rev. D 56 535-undefined
[5]  
Mukhanov VF(2002)Generating the curvature perturbation without an inflaton Phys. Lett. B 524 5-undefined
[6]  
Lyth DH(2002)Adiabatic CMB perturbations in pre-big bang string cosmology Nucl. Phys. B 626 395-undefined
[7]  
Wands D(2008)Primordial statistical anisotropy generated at the end of inflation JCAP 08 005-undefined
[8]  
Enqvist K(2011)Violation of the rotational invariance in the CMB bispectrum Prog. Theor. Phys. 126 923-undefined
[9]  
Sloth MS(2009)Statistical anisotropy of the curvature perturbation from vector field perturbations JCAP 05 013-undefined
[10]  
Yokoyama S(2009)Anisotropic non-gaussianity from vector field perturbations Phys. Rev. 80 023509-undefined
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