On possible small-x effects in the Kaluza-Klein graviton and radion production at high energies
arXiv:1612.03811 · doi:10.1103/PhysRevD.95.094010
Abstract
We study the single graviton production at the CERN LHC using the -factorization approach of QCD. We consider the Arkani-Hamed-Dimopoulos-Dvali scenario and Randall-Sundrum model with one warped extra-dimension and derive the production amplitudes for spin- (Kaluza-Klein excitation of the graviton) and spin- (radion) states, including subsequent graviton decay into the dilepton or diphoton pairs. We use the transverse momentum dependent (unintegrated) parton densities in a proton obtained from Ciafaloni-Catani-Fiorani-Marchesini (CCFM) evolution equation, which resums the leading logarithmic small- corrections to the production cross sections. We demonstrate that the small- effects can manifest themselves in the different angular distributions of graviton decay products and give some examples of how these distributions can look like at the LHC energies.
16 pages, 7 figures
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