Warped gravitons at the CERN LHC and beyond

By K. Agashe, H. Davoudiasl, G. Perez, A. Soni. 2007

178 citations recorded by the source corpus.

We study the production and decay of Kaluza-Klein (KK) gravitons at the CERN Large Hadron Collider (LHC), in the framework of a warped extra dimension in which the standard model (SM) fields propagate. Such a scenario can provide solutions to both the Planck-weak hierarchy problem and the flavor puzzle of the SM. In this scenario, the production via qq annihilation and decays to the conventional photon and lepton channels are highly suppressed. However, we show that graviton production via gluon fusion followed by decay to longitudinal Z/W can be significant; vector boson fusion is found to be a subdominant production mode. In particular, the golden ZZ decay mode offers a distinctive 4-lepton signal that could lead to the observation at the LHC with 300 fb{sup -1} (SLHC with 3 ab{sup -1}) of a KK graviton with a mass up to {approx}2 ({approx}3) TeV for the ratio of the AdS{sub 5} curvature to the Planck scale modestly above unity. We argue that (contrary to the lore) such a size of the curvature scale can still be within the regime of validity of the framework. Upgrades beyond the SLHC luminosity are required to discover gravitons heavier than {approx}4 TeV, as favored bymore » the electroweak and flavor precision tests in the simplest such models.« less

Subfields: Astronomy and Astrophysics, Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/5784bf34703192a968d8e8ab417d1b8d6f93ad00

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Citations in the corpus

Constraints on the spin-parity and anomalous HVV couplings of the Higgs boson in proton collisions at 7 and 8 TeV (2015, methodology): “A modified minimal coupling model 2b is also considered, where the SM fields are allowed to propagate in the bulk of the ED [71], corresponding to cVV 1 ≪ cVV 5 in the XZZ or XWW couplings only.”
Searching for the Kaluza-Klein Graviton in Bulk RS Models (2007, result): “Shortly after this work was submitted, there appeared the closely related work [ 20 ], focusing on KK graviton decays to W’s, and arguing that a slightly lower limit on M4L is allowed than that considered here.”