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Kaluza-Klein states and the geography of extra dimensions

Kaluza-Klein states and the geography of extra dimensions. Based on:. Davoudiasl, Hewett, Lillie, Rizzo hep-ph/0312193 Lillie hep-ph/0505074 Lillie, Randall, Wang In progress. Outline. Introduction RS model building Gluon KK states Dijet resonances Other KK states

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Kaluza-Klein states and the geography of extra dimensions

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  1. Kaluza-Klein states and the geography of extra dimensions Based on: Davoudiasl, Hewett, Lillie, Rizzo hep-ph/0312193 Lillie hep-ph/0505074 Lillie, Randall, Wang In progress

  2. Outline • Introduction • RS model building • Gluon KK states • Dijet resonances • Other KK states • Future work

  3. Motivation and formalism RS1 Solution to the Hierarchy problem IR Randall and Sundrum hep-ph/9905221 UV Spacetime is , compactified on Conformal coordinates Masses are scaled by Warping generates EW scale at the IR brane: (Parameters are natural) Goldberger and Wise hep-ph/9907447

  4. Where to put the SM? Original RS model: SM on TeV brane Problems with 4-fermion operators: Fermions on UV brane: But EWSB on TeV brane, so fermions must be bulk fields (Gauge fields must also then live in bulk) Can achieve gauge coupling unification Agashe, Delgado, and Sundrum hep-ph/0212028 Agashe, and Servant hep-ph/0411254

  5. Flavor problem This is a good thing 5D fermions are achiral, so we can write 5D mass Equations of motion have a zero mode KK Coupling to EWSB (Higgs) is then d s Suppress FCNC for first two generations UV Grossman and Neubert hep-ph/9912408 Gherghetta, Pomarol hep-ph/0003129 IR

  6. Formalism – gluon resonances Start by looking at a single resonance, mass m: Parameterize the couplings by: Note that the vertex is zero by orthogonality See also: Ghavri, McMullen, Nandi hep-ph/0602014

  7. Typical values Randall-Sundrum Flat extra dimension gluons fermions

  8. Single resonance in dijets Parton level, exact With gaussian detector smearinig 10 fb-1 M = 3 TeV

  9. B-jets 1 b-tag Parton-level 2 b-tags

  10. Comparing flat to RS Typical RS values: Dijets Need to look at the tt final state

  11. Drell-Yan Different widths to account for fermion location Generically will be lighter than studied here

  12. Graviton KK excitations NOT visible Light fermions near Planck brane, so graviton couplings highly suppressed Gauge bosons have volume suppression

  13. Future work • Things to include: • More dimensions (n=2,3) • tt final state (possibly in dijets) • PDF errors • Statistical analysis • Reach and exclusion (Tevatron/LHC) • Sensitivity to m, n, λ, λb, λt

  14. Conclusions • Work in progress • KK gluon production rates are large • Properties can be used to extract information • Most useful are bb and tt final states • Need a channel to find graviton resonances in RS

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