Rights statement: © 2011 American Physical Society
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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 - Particle Production of Vector Fields: Scale Invariance is Attractive
AU - Wagstaff, Jacques
AU - Dimopoulos, Konstantinos
N1 - arXiv:1011.2517 [hep-ph] © 2011 American Physical Society
PY - 2011/1/25
Y1 - 2011/1/25
N2 - In a model of an Abelian vector boson with a Maxwell kinetic term and non-negative mass-squared it is demonstrated that, under fairly general conditions during inflation, a scale-invariant spectrum of perturbations for the components of a vector field, massive or not, whose kinetic function (and mass) is modulated by the inflaton field is an attractor solution. If the field is massless, or if it remains light until the end of inflation, this attractor solution also generates anisotropic stress, which can render inflation weakly anisotropic. The above two characteristics of the attractor solution can source (independently or combined together) significant statistical anisotropy in the curvature perturbation, which may well be observable in the near future.
AB - In a model of an Abelian vector boson with a Maxwell kinetic term and non-negative mass-squared it is demonstrated that, under fairly general conditions during inflation, a scale-invariant spectrum of perturbations for the components of a vector field, massive or not, whose kinetic function (and mass) is modulated by the inflaton field is an attractor solution. If the field is massless, or if it remains light until the end of inflation, this attractor solution also generates anisotropic stress, which can render inflation weakly anisotropic. The above two characteristics of the attractor solution can source (independently or combined together) significant statistical anisotropy in the curvature perturbation, which may well be observable in the near future.
UR - http://www.scopus.com/inward/record.url?scp=79551536453&partnerID=8YFLogxK
U2 - 10.1103/PhysRevD.83.023523
DO - 10.1103/PhysRevD.83.023523
M3 - Journal article
AN - SCOPUS:79551536453
VL - 83
JO - Physical Review D
JF - Physical Review D
SN - 1550-7998
IS - 2
M1 - 023523
ER -