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Holograms of a dynamical top quark

Holograms of a dynamical top quark
Holograms of a dynamical top quark
We present holographic descriptions of dynamical electroweak symmetry breaking models that incorporate the top mass generation mechanism. The models allow computation of the spectrum in the presence of large anomalous dimensions due to walking and strong Nambu–Jona-Lasinio interactions. Technicolor and QCD dynamics are described by the bottom-up Dynamic AdS/QCD model for arbitrary gauge groups and numbers of quark flavors. An assumption about the running of the anomalous dimension of the quark bilinear operator is input, and the model then predicts the spectrum and decay constants for the mesons. We add Nambu–Jona-Lasinio interactions responsible for flavor physics from extended technicolor, top-color, etc., using Witten’s multitrace prescription. We show the key behaviors of a top condensation model can be reproduced. We study generation of the top mass in (walking) one doublet and one family technicolor models and with strong extended technicolor interactions. The models clearly reveal the tensions between the large top mass and precision data for δρ. The necessary tunings needed to generate a model compatible with precision constraints are simply demonstrated.
1550-7998
Clemens, William, Howard
43bd1d41-555e-48f1-9101-3b4d6cec45da
Evans, Nicholas
33dfbb52-64dd-4c1f-9cd1-074faf2be4b3
Scott, Marc
4a6abe2e-59fb-4a70-8452-7c13bd0c5ce2
Clemens, William, Howard
43bd1d41-555e-48f1-9101-3b4d6cec45da
Evans, Nicholas
33dfbb52-64dd-4c1f-9cd1-074faf2be4b3
Scott, Marc
4a6abe2e-59fb-4a70-8452-7c13bd0c5ce2

Clemens, William, Howard, Evans, Nicholas and Scott, Marc (2017) Holograms of a dynamical top quark. Physical Review D, 96. (doi:10.1103/PhysRevD.96.055016).

Record type: Article

Abstract

We present holographic descriptions of dynamical electroweak symmetry breaking models that incorporate the top mass generation mechanism. The models allow computation of the spectrum in the presence of large anomalous dimensions due to walking and strong Nambu–Jona-Lasinio interactions. Technicolor and QCD dynamics are described by the bottom-up Dynamic AdS/QCD model for arbitrary gauge groups and numbers of quark flavors. An assumption about the running of the anomalous dimension of the quark bilinear operator is input, and the model then predicts the spectrum and decay constants for the mesons. We add Nambu–Jona-Lasinio interactions responsible for flavor physics from extended technicolor, top-color, etc., using Witten’s multitrace prescription. We show the key behaviors of a top condensation model can be reproduced. We study generation of the top mass in (walking) one doublet and one family technicolor models and with strong extended technicolor interactions. The models clearly reveal the tensions between the large top mass and precision data for δρ. The necessary tunings needed to generate a model compatible with precision constraints are simply demonstrated.

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Holograms of a Dynamical Top Quark - Accepted Manuscript
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Accepted/In Press date: 9 August 2017
e-pub ahead of print date: 14 September 2017

Identifiers

Local EPrints ID: 414696
URI: https://eprints.soton.ac.uk/id/eprint/414696
ISSN: 1550-7998
PURE UUID: 028fb18c-ad9c-4972-8289-12abb5ac2906

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Date deposited: 06 Oct 2017 16:31
Last modified: 18 Jul 2019 11:31

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