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Amplitudes Topologiques et l'Action Effective de la Théorie des Cordes

Abstract : In this thesis, we study a class of higher derivative couplings in the string effective action arising at the junction of topological string theory and supersymmetric gauge theories in the Omega-background. They generalise a series of gravitational couplings involving gravitons and graviphotons, which reproduces the topological string theory partition function. The latter reduces, in the field theory limit, to the partition function of the gauge theory in the Omega-background when one if its parameters, say epsilon_+, is set to zero. This suggests the existence of a one-parameter extension called the refined topological string. The couplings considered in this work involve an additional vector multiplet and are evaluated, perturbatively and non-perturbatively, at the string level. In the field theory limit, they correctly reproduce the partition function of the gauge theory in a general Omega-background. Hence, these couplings provide new perspectives toward a worldsheet definition of the refined topological string.
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https://theses.hal.science/tel-00942993
Contributor : Ahmad Zein Assi Connect in order to contact the contributor
Submitted on : Monday, February 10, 2014 - 10:19:27 AM
Last modification on : Friday, October 23, 2020 - 4:45:59 PM
Long-term archiving on: : Sunday, May 11, 2014 - 1:25:16 AM

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  • HAL Id : tel-00942993, version 2

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Ahmad Zein Assi. Amplitudes Topologiques et l'Action Effective de la Théorie des Cordes. Physique des Hautes Energies - Théorie [hep-th]. Ecole Polytechnique X, 2013. Français. ⟨NNT : ⟩. ⟨tel-00942993v2⟩

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