Search for microscopic black hole signatures at the Large Hadron Collider


Khachatryan V., Sirunyan A. M. , Tumasyan A., Adam W., Bergauer T., Dragicevic M., ...More

PHYSICS LETTERS B, vol.697, no.5, pp.434-453, 2011 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 697 Issue: 5
  • Publication Date: 2011
  • Doi Number: 10.1016/j.physletb.2011.02.032
  • Journal Name: PHYSICS LETTERS B
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.434-453
  • Keywords: CMS, Physics, Black holes, Extra dimensions, DIMENSIONS
  • Middle East Technical University Affiliated: Yes

Abstract

A search for microscopic black hole production and decay in pp collisions at a center-of-mass energy of 7 TeV has been conducted by the CMS Collaboration at the LHC, using a data sample corresponding to an integrated luminosity of 35 pb(-1). Events with large total transverse energy are analyzed for the presence of multiple high-energy jets, leptons, and photons, typical of a signal expected from a microscopic black hole. Good agreement with the standard model backgrounds, dominated by QCD multijet production, is observed for various final-state multiplicities and model-independent limits on new physics in these final states are set. Using simple semi-classical approximation, limits on the minimum black hole mass are derived as well, in the range 3.5-4.5 TeV. These are the first direct limits on black hole production at a particle accelerator. (c) 2011 CERN. Published by Elsevier B.V. All rights reserved.