Particle production of vector fields: Scale invariance is attractive

Journal Article · Sat Jan 15 00:00:00 EST 2011 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.83.023523· OSTI ID:21513068

Wagstaff, Jacques M; Dimopoulos, Konstantinos ^[1]

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1. Physics Department, Lancaster University, Lancaster LA1 4YB (United Kingdom)

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.

• OSTI ID: 21513068
• Journal Information: Physical Review. D, Particles Fields, Vol. 83, Issue 2; Other Information: DOI: 10.1103/PhysRevD.83.023523; (c) 2011 American Institute of Physics; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ANISOTROPY
ATTRACTORS
INTERMEDIATE VECTOR BOSONS
MATHEMATICAL SOLUTIONS
MAXWELL EQUATIONS
NEGATIVE MASS
PARTICLE PRODUCTION
PERTURBATION THEORY
SCALE INVARIANCE
SIMULATION
SPECTRA
VECTOR FIELDS
BOSONS
DIFFERENTIAL EQUATIONS
ELEMENTARY PARTICLES
EQUATIONS
HYPOTHESIS
INTERMEDIATE BOSONS
INVARIANCE PRINCIPLES
MASS
PARTIAL DIFFERENTIAL EQUATIONS