Abstract
We study central production, in the inclusive case, to look for graviton signals in a large extra dimensional model using dilepton and diphoton channels. We carefully analyze signal and possible standard model background processes and study the feasibility of such new physics searches in a relatively clean environment as in central production where the proton fragments are mostly emitted in the forward direction, and there is a clear rapidity gap between them and the centrally produced system. Our analysis shows that the LHC with 14 TeV center of mass energy and 100 fb−1(300 fb−1) of integrated luminosity can probe the effective gravity scale up to 3.6 TeV (4.4 TeV) in both the dilepton and diphoton channels.
Highlights
The standard model (SM) has been extremely compatible with all the experimental tests so far
In this paper, we look for the graviton signals as predicted in the large extra dimensional model in the central diffractive processes at the Large Hadron Collider (LHC)
Our results depend on two model parameters, the number of extra dimensions n and the ultraviolet cutoff MS of the theory, and four kinematical variables, invariant mass M and rapidity y of the centrally produced system, rapidity gap Δη between the central system and the outgoing protons or proton dissociated products, and the center of mass (CM) energy √S of two colliding protons at the LHC
Summary
The standard model (SM) has been extremely compatible with all the experimental tests so far. The importance of forward physics has been recognized for Large Hadron Collider (LHC) physics too This has resulted in a proposal to install forward particle detectors at ATLAS and CMS in order to detect protons emitted in the forward direction, implying the existence of a centrally produced system with a rapidity gap between it and the protons [3, 4]. These processes already seen at the Tevatron have given confidence that we can use digluon fusion in accordance with the Durham model to observe the signatures of new physics It was indicated in [32] that new physics like SUSY, extra dimensions, and so forth can be searched for in exclusive processes.
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