On Direct Verification of Warped Hierarchy-and-FlavorModels

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We consider direct experimental verification of warped models, based on the Randall-Sundrum (RS) scenario, that explain gauge and flavor hierarchies, assuming that the gauge fields and fermions of the Standard Model (SM) propagate in the 5D bulk. Most studies have focused on the bosonic Kaluza Klein (KK) signatures and indicate that discovering gauge KK modes is likely possible, yet challenging, while graviton KK modes are unlikely to be accessible at the LHC, even with a luminosity upgrade. We show that direct evidence for bulk SM fermions, i.e. their KK modes, is likely also beyond the reach of a luminosity-upgraded LHC. ... continued below

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21 pages

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Davoudiasl, Hooman; /Brookhaven; Rizzo, Thomas G.; /SLAC; Soni, Amarjit & /Brookhaven October 15, 2007.

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We consider direct experimental verification of warped models, based on the Randall-Sundrum (RS) scenario, that explain gauge and flavor hierarchies, assuming that the gauge fields and fermions of the Standard Model (SM) propagate in the 5D bulk. Most studies have focused on the bosonic Kaluza Klein (KK) signatures and indicate that discovering gauge KK modes is likely possible, yet challenging, while graviton KK modes are unlikely to be accessible at the LHC, even with a luminosity upgrade. We show that direct evidence for bulk SM fermions, i.e. their KK modes, is likely also beyond the reach of a luminosity-upgraded LHC. Thus, neither the spin-2 KK graviton, the most distinct RS signal, nor the KK SM fermions, direct evidence for bulk flavor, seem to be within the reach of the LHC. We then consider hadron colliders with vs. = 21, 28, and 60 TeV. We find that discovering the first KK modes of SM fermions and the graviton typically requires the Next Hadron Collider (NHC) with {radical}s {approx} 60 TeV and O(1) ab-1 of integrated luminosity. If the LHC yields hints of these warped models, establishing that Nature is described by them, or their 4D CFT duals, requires an NHC-class machine in the post-LHC experimental program.

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21 pages

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  • Journal Name: Physical Review D

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  • Report No.: SLAC-PUB-12855
  • Grant Number: AC02-76SF00515
  • Office of Scientific & Technical Information Report Number: 918031
  • Archival Resource Key: ark:/67531/metadc891459

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  • October 15, 2007

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  • Sept. 22, 2016, 2:13 a.m.

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  • Nov. 30, 2016, 2:08 p.m.

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Davoudiasl, Hooman; /Brookhaven; Rizzo, Thomas G.; /SLAC; Soni, Amarjit & /Brookhaven. On Direct Verification of Warped Hierarchy-and-FlavorModels, article, October 15, 2007; [Menlo Park, California]. (digital.library.unt.edu/ark:/67531/metadc891459/: accessed September 20, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.