Gauge fields in a string-cigar braneworld

Abstract

In this work we investigate the properties of an Abelian gauge vector field in a thin and in a smoothed string-like braneworld, the so-called string-cigar model. This thick brane scenario satisfies the regularity conditions and it can be regarded as an interior and exterior string-like solution. The source undergoes a geometric Ricci flow which is connected to a variation of the bulk cosmological constant. The Ricci flow changes the width and amplitude of the massless mode at the brane core and recover the usual thin string-like behavior at large distances. By numerical means we obtain the Kaluza-Klein (KK) spectrum for both the thin brane and the string-cigar. It turns out that both models exhibit a mass gap between the massless and the massive modes and between the high and the low mass regimes. The KK modes are smooth near the brane and their amplitude are enhanced by the string-cigar core. The analogue Schrödinger potential is also tuned by the geometric flow.

The discussion about the Kaluza-Klein spectrum of the gauge field was improved. Numerical analysis was adapted to the conventional notation on Kaluza-Klein number. Some graphics were modified for considering other notation. Results unchanged. References added. Corrected typos. 17 pages. 6 figures. To match version to appears in Physics Letters B

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• Thick string-like braneworlds in f(T) gravity
• Corrections to Newton's law of gravitation in the context of codimension-1 warped thick braneworlds
• Consistency Conditions for Fields Localization on Braneworlds
• Monopoles on string-like models and the Coulomb's law
• Localization and mass spectra of various matter fields on Weyl thin brane
• Braneworlds in Warped Einsteinian Cubic Gravity
• Consistency Conditions for $p$-Form Fields Localization on Codimension two Braneworlds
• Metamaterial branes
• The End of the Road for Bulk Fields in Warped Randall-Sundrum Braneworlds