Critical comment on the recent microscopic black hole search at the LHC

TL;DR

This paper critically examines the recent LHC black hole search, arguing that the parameter space used by CMS is outside the valid semi-classical regime, questioning the robustness of their conclusions.

Contribution

It provides a theoretical critique of the CMS black hole search analysis, highlighting the need for a solid scientific basis in the parameter range used.

Findings

The CMS parameter range is outside the semi-classical black hole validity.

Monte Carlo simulations used lack sufficient theoretical support.

The interpretation of the search results is potentially unreliable.

Abstract

Recently the CMS collaboration at the LHC reported "the first direct limit on black hole production at a particle accelerator" using a data sample corresponding to an integrated luminosity of 35/pb of pp-collision at a center of mass energy of 7 TeV. Even though the result has a strong impact on future searches, the interpretation lacks enough theoretical support. In this letter, we show that the parameter range which was considered by the CMS collaboration is actually out of the validity range of semi-classical black hole picture so that the Monte-Carlo simulation result which was crucially used in the analysis still needs further solid scientific basis.