A note on gauge-fixing in the electroweak sector of nmUED

Abstract

Electroweak observables are highly sensitive to the loop corrections. Therefore, a proper gauge-fixing mechanism is always needed to define the propagators which are involved in Feynman loop amplitude. With this spirit we compute gauge-fixing mechanism in five dimensional (5-D) Universal Extra-Dimensional (UED) model with boundary localised terms (BLTs). These BLTs are not 5-D operators in four-dimensional (4-D) effective theory but some sort of boundary conditions on the respective fields at the fixed points of $S^1/Z_2$ orbifold. Furthermore, these BLTs non-trivially modify the Kaluza-Klein (KK) spectra and some of the interactions among the KK-excitations compared to the minimal UED (mUED), in which, these BLTs are absent. In this note we calculate the gauge-fixing mechanism in the electroweak sector of such non-trivial UED scenario. Moreover, we discuss the composition and masses of Goldstone and any physical scalar that emerge after the symmetry breaking in this set up with different choices of gauge.

9 pages, title has been changed, matched with the published version

References in corpus (4)

• Non-minimal universal extra dimensions
• Higgsless fermion masses and unitarity
• KK-parity non-conservation in UED confronts LHC data
• Non-minimal UED confronts $B_s\to {\mu }^{+}{\mu }^{-}$

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• Looking for $B\to X_s{\ell }^{+}{\ell }^{-}$ in non-minimal Universal Extra Dimensional model
• Effects of non-minimal Universal Extra Dimension on $B\to X_s\gamma$
• Exploring non minimal Universal Extra Dimensional Model at the LHC
• Unitarity Constraints on non-minimal Universal Extra Dimensional Model
• $B$ anomalies in the nonminimal universal extra dimension model
• The impact of nonminimal Universal Extra Dimensional model on $\Delta B=2$ transitions
• Indian Contributions to LHC Theory
• Belle II Constraints on the Non-Minimal Universal Extra Dimensional Model