2015/12/21 by Hisaki Hatanaka, Hatanaka, Hisaki · 1 citation
Physics and Astronomy · #Black Holes and Theoretical Physics #Cosmology and Gravitation Theories #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #Particle physics theoretical and experimental studies #hep-ph
paper · pdf · doi:10.48550/arxiv.1512.06595
22 pages, 1 table, 3 figures
arxiv created 2015/12/21 · openalex publication_date 2015/12/21 · arxiv updated 2015/12/22 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
The Higgsless model in warped extra dimension is reexamined. Dirichlet boundary conditions on the TeV brane are replaced with Robin boundary conditions which are parameterized by a mass parameter M. We calculate the Peskin-Takeuchi precision parameters S, T and U at tree level. We find that to satisfy the constraints on the precision parameters at 99 % [95 %] confidence level (CL) the first Kaluza-Klein excited Z boson, Z', should be heavier than 5 TeV [8 TeV]. The Magnitude of M, which is infinitely large in the original model, should be smaller than 200 GeV (70 GeV) for the curvature of the warped space R-1=1016 GeV (108 GeV) at 95% CL. If the Robin boundary conditions are induced by the mass terms localized on the TeV brane, from the 99% [95%] bound we find that the brane mass interactions account for more than 97% [99%] of the masses of Z and W bosons. Such a brane mass term is naturally interpreted as a vacuum expectation value of the Higgs scalar field in the standard model localized on the TeV brane. If so, the model can be tested by precise measurements of HWW, HZZ couplings and search for 1st Kaluza-Klein excited states.