Gauge-flation: Inflation From Non-Abelian Gauge Fields

By A. Maleknejad, M. Sheikh-Jabbari. 2011

280 citations recorded by the source corpus.

Inflationary models are usually based on dynamics of one or more scalar fields coupled to gravity. In this work we present a new class of inflationary models, gauge-flation or non-Abelian gauge field inflation, where slow-roll inflation is driven by a non-Abelian gauge field. This class of models are based on a gauge field theory with a generic non-Abelian gauge group minimally coupled to gravity. We then focus on a particular gauge-flation model by specifying the action for the gauge theory which allows for a successful slow-roll inflation. This model has two parameters the value of which can be fixed using the CMB and other cosmological data. These values are within the natural range of parameters in generic grand unified theories of particle physics.

Subfields: Astronomy and Astrophysics, Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/95456faa2473de4be65db178943ba39753cd575a

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Citations in the corpus

New physics from the polarized light of the cosmic microwave background (2022, background): “The perturbation contains 1 tensor, 2 vector, and 3 scalar modes, δ A ai = t ai + ... , where t ai is transverse and traceless (tensor mode) and ‘ ... ’ contains scalar and vector modes 232,233 .”
Gravitational waves at interferometer scales and primordial black holes in axion inflation (2016, background): “(5)While the original formulations of the models [28, 29] are ruled out by CMB observations [30–32], chiral gravity waves can also be sourced by gauge fields in extensions of Chromo-Natural inflation and Gaugeflation [33–36].”
CMB-S4 Science Case, Reference Design, and Project Plan (2019, background): “, solid inflation [124] or gauge-flation [125, 126]); gravitational waves not produced as vacuum fluctuations; or multiple tensors (e.”
Reconstructing the spectral shape of a stochastic gravitational wave background with LISA (2019, background): “[6–29]), to models that break space-time symmetries during inflation, leading to a blue spectrum for primordial tensor modes (see e.”
Science with the space-based interferometer LISA. IV: probing inflation with gravitational waves (2016, background): “original versions, they are plagued by a ghost mode [122], but there exist scenarios, such as gauge or chromo-natural inflation [123, 124], which are free from such instabilities, while they lead to various distinctive signatures for the tensor spectrum (see e.”
Gauge fields and inflation (2012, methodology): “We therefore choose the gauge-flation action to be of the form [121, 122]”