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arXiv · 2510.24625

Dijets with a large rapidity separation in the next-to-leading order BFKL formalism for searches of large extra dimensions at colliders

Anatolii Iu. Egorov·Victor T. Kim·Viktor A. Murzin·Vadim A. Oreshkin
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Abstract

Search for the gravity with large extra dimensions at collider energies is considered in the trans-Planckian eikonal regime, i.e., when $\sqrt{\hat{s}} \gg M_D \gg \sqrt{-\hat{t}}$. Here $\hat{s}$ and $\hat{t}$ are the Mandelstam variables of colliding parton-parton system and $M_D$ is the Planck mass scale in the space-time with compactified $n_D$ extra dimensions. A relevant observable for this regime may be the cross section of high-mass ($M_{jj}\sim\sqrt{\hat{s}} \gg M_D$) dijet production with a large rapidity separation. Then the standard model background should be calculated within the next-to-leading logarithmic (NLL) approximation of Lipatov-Fadin-Kuraev-Balitsky (BFKL) formalism of quantum chromodynamics (QCD) suitable for $\sqrt{\hat{s}}\gg\sqrt{-\hat{t}}\gg\Lambda_\mathrm{QCD}$. In this work the signal of the large extra dimension gravity as well as the NLL BFKL QCD background are estimated for the high-luminosity Large Hadron Collider (HL-LHC) and future colliders such as FCCpp and CEPC-SppC.

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Anatolii Iu. Egorov, Victor T. Kim, Viktor A. Murzin, Vadim A. Oreshkin. 2025-10-28. Dijets with a large rapidity separation in the next-to-leading order BFKL formalism for searches of large extra dimensions at colliders. https://doi.org/10.1103/3926-n74c

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