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Search for black holes and other new phenomena in high-multiplicity final states in proton–proton collisions at √s=13TeV
Journal article   Open access   Peer reviewed

Search for black holes and other new phenomena in high-multiplicity final states in proton–proton collisions at √s=13TeV

A. M Sirunyan, Hugues Brun, Barbara Clerbaux, Gilles Lentdecker, Hugo Delannoy, Giuseppe Fasanella, Laurent Favart, Anastasia Grebenyuk, Georgia Karapostoli, Thomas Lenzi, …
Physics letters. B, Vol.774, pp.279-307
11/01/2017
DOI: 10.1016/j.physletb.2017.09.053
url
https://doi.org/10.1016/j.physletb.2017.09.053View
Published (Version of record) Open Access

Abstract

A search for new physics in energetic, high-multiplicity final states has been performed using proton–proton collision data collected with the CMS detector at a center-of-mass energy of 13TeV and corresponding to an integrated luminosity of 2.3fb−1. The standard model background, dominated by multijet production, is determined exclusively from control regions in data. No statistically significant excess of events is observed. Model-independent limits on the product of the cross section and the acceptance of a new physics signal in these final states are set and further interpreted in terms of limits on the production of black holes. Semiclassical black holes and string balls with masses as high as 9.5TeV, and quantum black holes with masses as high as 9.0TeV are excluded by this search in the context of models with extra dimensions, thus significantly extending limits set at a center-of-mass energy of 8TeV with the LHC Run 1 data.
Physique des particules élémentaires

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