Big Signals of Little Randall-Sundrum Models

Abstract

We examine signals at the Large Hadron Collider (LHC) of Kaluza-Klein modes, in volume-truncated "Little Randall-Sundrum" (LRS) models of flavor, characterized by 5D cutoff scales M_5 that are small compared to the 4D Planck mass M_P ~ 10^{19} GeV. In particular, for the phenomenologically viable choice M_5 ~ 10^4 TeV, the discovery of a 2 (3)-TeV "Little" Z' at the LHC requires about 1 (4) 1/fb at \sqrt{s}=10 (14) TeV, in the clean di-lepton channel. Our results highlight the possibility of probing interesting values of M_5, starting with the early LHC data. With M_5 ~ 10^4 TeV, discovering the second KK mode Z'', at about 4.3 TeV, requires O(100) 1/fb at \sqrt{s}=14 TeV, providing a probe of the warped nature of the bulk that is encoded in the mass ratio of the first two KK modes, at design luminosity. By comparison, discovering a 3-TeV Z' of the Planck-weak hierarchy models (with M_5 ~ M_P), in any channel, would require upwards of O(300) 1/fb at \sqrt{s}=14 TeV. We also point out that discovery prospects markedly improve for Little KK gluons as well, but the challenging reconstruction of their t tbar decay products may not allow an appreciable advantage for early discovery, over the Little Z' case.

Revtex 4, 7 pages, 1 table, and 9 figures

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• Boosted Top Quark Signals for Heavy Vector Boson Excitations in a Universal Extra Dimension Model
• Precocious Diphoton Signals of the Little Radion at Hadron Colliders
• Probing the Gauge Content of Heavy Resonances with Soft Radiation
• Randall-Sundrum and Strings
• Warped Graviton "Z + Missing Energy" Signal at Hadron Colliders
• Gravity on a Little Warped Space
• TASI 2009 Lectures - Flavor Physics
• The Radion as a Harbinger of Deca-TeV Physics
• Indian Contributions to LHC Theory
• Taming the ${\epsilon }_K$ in Little Randall Sundrum Models