Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2009-04-27
JHEP 0907:077,2009
Physics
High Energy Physics
High Energy Physics - Phenomenology
17 pages, 6 figures Version published in JHEP with minor corrections
Scientific paper
10.1088/1126-6708/2009/07/077
In string realizations of the Randall-Sundrum scenario, the higher-spin Regge excitations of Standard Model states localized near the IR brane are warped down to close to the TeV scale. We argue that, as a consequence of the localization properties of Randall-Sundrum models of flavour, the lightest such resonance is the spin-3/2 excitation of the right-handed top quark over a significant region of parameter space. A mild accidental cancellation allows this resonance to be as light or lighter than the Kaluza-Klein excitations of the Standard Model states. We consider from a bottom-up effective theory point of view the production and possible observability of such a spin-3/2 excitation at the LHC and Tevatron. Current limits are weaker than might be expected because of the excess of WWjj events at the Tevatron reported by CDF for an invariant mass of 400-500 GeV.
Hassanain Babiker
March-Russell John
Rosa Joao G.
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