(CMS Collaboration) Chatrchyan, S.; Brigljević, Vuko; Đurić, Senka; Kadija, Krešo; Luetić, Jelena; Morović, Srećko (2012) Search for Signatures of Extra Dimensions in the Diphoton Mass Spectrum at the Large Hadron Collider. Physical Review Letters, 108 (11). 111801/1-111801/16. ISSN 0031-9007
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Abstract
A search for signatures of extra spatial 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 √s=7 TeV corresponding to an integrated luminosity of 2.2 fb-1. 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.
| Item Type: | Article | ||||||||
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| Uncontrolled Keywords: | photon pair production; hierarchy; gravity; signals | ||||||||
| Subjects: | NATURAL SCIENCES > Physics | ||||||||
| Divisions: | Division of Experimental Physics | ||||||||
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| Depositing User: | Krešo Kadija | ||||||||
| Date Deposited: | 16 Sep 2013 15:44 | ||||||||
| URI: | http://fulir.irb.hr/id/eprint/618 | ||||||||
| DOI: | 10.1103/PhysRevLett.108.111801 |
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