Ultra-High Energy Probes of Classicalization

TL;DR

This paper explores classicalizing theories where the rapid growth of scattering cross sections at high energies makes them promising for ultra-high energy experiments, revealing quantum black hole states through classicalon production.

Contribution

It introduces a quantum perspective on classicalization, identifying a class of spin-2 theories where classicalon production can compete with QCD at 100 TeV energies.

Findings

Classicalon production cross section can rival QCD at 100 TeV.

Quantum black holes with graviton occupation number around 10^4 are predicted.

The quantum picture broadens the landscape of experimentally accessible theories.

Abstract

Classicalizing theories are characterized by a rapid growth of the scattering cross section. This growth converts these sort of theories in interesting probes for ultra-high energy experiments even at relatively low luminosity, such as cosmic rays or Plasma Wakefield accelerators. The microscopic reason behind this growth is the production of N-particle states, classicalons, that represent self-sustained lumps of soft Bosons. For spin-2 theories this is the quantum portrait of what in the classical limit are known as black holes. We emphasize the importance of this quantum picture which liberates us from the artifacts of the classical geometric limit and allows to scan a much wider landscape of experimentally-interesting quantum theories. We identify a phenomenologically-viable class of spin-2 theories for which the growth of classicalon production cross section can be as efficient as to compete with QCD cross section already at 100 TeV energy, signaling production of quantum black holes with graviton occupation number of order 10^4.