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 root 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.

Search for Signatures of Extra Dimensions in the Diphoton Mass Spectrum at the Large Hadron Collider / S., C., V., K., A. M., S., A., T., W., A., T., B., M., D., J., E., C., F., M., F., R., F., V. M., G., J., H., M., H., N., H., J., H., M., J., W., K., A., K., M., K., et al.. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - 108:11(2012), p. 111801. [10.1103/physrevlett.108.111801]

Search for Signatures of Extra Dimensions in the Diphoton Mass Spectrum at the Large Hadron Collider

BARONE, Luciano Maria;DEL RE, Daniele;LONGO, Egidio;ORGANTINI, Giovanni;PARAMATTI, Riccardo;RAHATLOU, SHAHRAM;SANTANASTASIO, FRANCESCO;TRACZYK, PIOTR WOJCIECH;
2012

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 root 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.
2012
01 Pubblicazione su rivista::01a Articolo in rivista
Search for Signatures of Extra Dimensions in the Diphoton Mass Spectrum at the Large Hadron Collider / S., C., V., K., A. M., S., A., T., W., A., T., B., M., D., J., E., C., F., M., F., R., F., V. M., G., J., H., M., H., N., H., J., H., M., J., W., K., A., K., M., K., et al.. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - 108:11(2012), p. 111801. [10.1103/physrevlett.108.111801]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/450174
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