NONLINEAR PHENOMENA IN COMPLEX SYSTEMS
An Interdisciplinary Journal

2007, Vol.10, No.4, pp.401-406


Identifying Large Extra Dimensions at the LHC with Center-Edge Asymmetry.
I. A. Serenkova and A. A. Pankov

Arkani-Hamed, Dimopoulous, and Dvali have proposed a model (ADD) of low-scale quantum gravity featuring large extra dimensions. It has been shown that in such a model the exchange of Kaluza-Klein (KK) towers of gravitons can enhance the production rate of lepton pairs at high invariant mass in proton-proton collisions at the LHC. The amount of enhancement is characterized by the parameter MS, the fundamental Planck scale in the bulk extra dimensions. We study the possibility of using the center-edge asymmetry to distinguish spin-2 Kaluza-Klein graviton exchange within the ADD scenario from other new physics effects described by spin-1 exchange in lepton-pair production at the LHC. We find that the LHC detectors will be capable of discovering and identifying graviton spin-2 exchange effects in the ADD scenario with MS ranging from 4.6 TeV to 9.4 TeV depending on luminosity and number of extra dimensions.
Key words: lepton-pair production, graviton spin-2 exchange effects, extra dimensions

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