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Search for signatures of extra dimensions in the diphoton mass spectrum at the Large Hadron Collider
Journal article   Open access   Peer reviewed

Search for signatures of extra dimensions in the diphoton mass spectrum at the Large Hadron Collider

S Chatrchyan, D Sillou, M Besancon, S Choudhury, M Dejardin, D Denegri, B Fabbro, J.L Faure, F Ferri, S Ganjour, …
Physical review letters, Vol.108(11), p.111801
2012
DOI: 10.1103/PhysRevLett.108.111801
PMID: 22540461
url
https://doi.org/10.1103/PhysRevLett.108.111801View
Published (Version of record) Open Access

Abstract

A search for signatures of extra dimensions in the diphoton invariant-mass spectrum has been performed with the CMS detector at the LHC. No excess of events above the standard model expectation is observed using a data sample collected in proton-proton collisions at sqrt(s) = 7 TeV corresponding to an integrated luminosity of 2.2 inverse femtobarns. In the context of the large-extra-dimensions model, lower limits are set on the effective Planck scale in the range of 2.3-3.8 TeV at the 95% confidence level. These limits are the most restrictive bounds on virtual-graviton exchange to date. The most restrictive lower limits to date are also set on the mass of the first graviton excitation in the Randall-Sundrum model in the range of 0.86-1.84 TeV, for values of the associated coupling parameter between 0.01 and 0.10.
Physics High Energy Physics - Experiment

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