Revisiting the Real Graviton Effects at CERN LHC within the Quantum Gravity Theory with Large Extra Dimensions

Abstract

CERN LHC provides a good experimental platform to perturbatively probe the fundamental gravity scale up to several TeV, with the precise value depending on the number of extra dimensions. The leading experimental signal of graviton at LHC is from the process $pp\to jet+{E\slash}_T$, where ${E\slash}_T$ stands for the transverse missing energy. A detailed discussion on the hadronic production of real graviton through hard subprocesses: $q\bar{q}\to G+g$, $g+q\to G+q$ and $g+g\to G+g$ have been studied within the quantum gravity theory with large extra dimensions. The main theoretical uncertainties together with the dominant standard model background to these processes, e.g. $q\bar{q}\to Z^0+g$ and $g+q\to Z^0+q$ with $Z^0$ further decaying into neutrinos, have also been discussed. It is found that only in certain jet energy region and with certain number of extra dimensions can the quantum gravity signal be distinguished from the background, which inversely lead to the effective scale $M_D$ to be probed up to $(8.8\pm 0.9)$ TeV for two extra dimensions, and $(5.9\pm 0.5)$ TeV for four extra dimensions with sufficient integrated luminosity, e.g. $100f{b}^{-1}$, at CERN LHC.

14 pages, 4 figures, 3 tables. References added. To be published in Phys.Rev.D

References in corpus (4)

• Tests of the Gravitational Inverse-Square Law below the Dark-Energy Length Scale
• Search for Large Extra Dimensions via Single Photon plus Missing Energy Final States at sqrt(s) = 1.96 TeV
• Signatures of black holes at the LHC
• Searches for hyperbolic extra dimensions at the LHC

Cited by in corpus (9)

• Signal Photon Flux and Background Noise in a Coupling Electromagnetic Detecting System for High Frequency Gravitational Waves
• NLO QCD corrections to graviton production at hadron colliders
• Classical ultrarelativistic bremsstrahlung in extra dimensions
• Vector boson production in association with KK modes of the ADD model to NLO in QCD at LHC
• Graviton plus vector boson production to NLO in QCD at the LHC
• Quasi-B-mode generated by high-frequency gravitational waves and corresponding perturbative photon fluxes
• Electromagnetic counterparts of high-frequency gravitational waves in a rotating laboratory frame system and their detection
• ZZ+jet and Graviton+jet at NLO QCD: recent applications using GOLEM methods
• Quiver Gauge Models in F-Theory on Local Tetrahedron