Searching for the Layered Structure of Space at the LHC

Abstract

Alignment of the main energy fluxes along a straight line in a target plane has been observed in families of cosmic ray particles detected in the Pamir mountains. The fraction of events with alignment is statistically significant for families with superhigh energies and large numbers of hadrons. This can be interpreted as evidence for coplanar hard-scattering of secondary hadrons produced in the early stages of the atmospheric cascade development. This phenomenon can be described within the recently proposed "crystal world," with latticized and anisotropic spatial dimensions. Planar events are expected to dominate particle collisions at a hard-scattering energy exceeding the scale Λ_3 at which space transitions from 3D \rightleftharpoons 2D. We study specific collider signatures that will test this hypothesis. We show that the energy-spectrum of Drell-Yan scattering and the parton momenta sum rule are significantly modified in this framework. At the LHC, two jet and three jet events are necessarily planar, but four jet events can test the hypothesis. Accordingly, we study in a model-independent way the 5σdiscovery reach of the ATLAS and CMS experiments for identifying four jets coplanarities. For the extreme scenario in which all pp \to 4 jet scattering processes become coplanar above Λ_3, we show that with an integrated luminosity of 10(100) fb^{-1} the LHC experiments have the potential to discover correlations between jets if Λ_3 \alt 1.25(1.6) TeV.

arXiv commentTo be published in Phys. Rev. D

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