Angular correlations in TeV-gravity black hole events

TL;DR

This paper investigates angular correlations in TeV-scale black hole events at the LHC, using theoretical and simulation methods to identify signatures of black hole rotation through angular observables.

Contribution

It introduces new angular observables optimized for detecting rotation effects in black hole decay signatures at the LHC, combining theoretical analysis with parton level simulations.

Findings

Energy cuts can enhance detection of rotation effects.

Angular asymmetries are maximized for spin-1 particles.

Simulation results suggest feasible identification of black hole rotation signatures.

Abstract

We perform a parton level study of angular correlations, in higher dimensional black hole events scenarios at the LHC. We start by discussing some features of the angular spectrum in the high energy limit using the geometrical optics approximation. This allows us to recover the high energy limit of the Hawking fluxes. Then we use the full Hawking angular fluxes on the brane, for a singly rotating Myers-Perry black hole, to motivate the construction of various angular observables as to maximise the angular asymmetries due to rotation. This is finally adapted to a parton level simulation using the CHARYBDIS2 generator. We explore two types of variables based on: axis reconstruction and two-particle angular correlators. We find energy cuts which have the potential to help identify the effects of rotation in semi-classical rotating black hole events at the LHC during the 14 TeV run, especially for spin-1 particles.