Search for signatures of extra dimensions in the diphoton mass spectrum at the Large Hadron Collider
par Chatrchyan, Serguei;Clerbaux, Barbara 
;De Lentdecker, Gilles ;Gay, Arnaud ;Hreus, Tomas ;Leonard, Alexandre ;Marage, Pierre ;Thomas, Laurent ;Vander Velde, Catherine ;Vanlaer, Pascal ;Wang, Jian ;Charaf, Othman ;Dero, Vincent ;Hammad, Grégory ;Wickens, John H. ; [et al.]
Référence Physical review letters, 108, 11, 111801
Publication Publié, 2012
;De Lentdecker, Gilles ;Gay, Arnaud ;Hreus, Tomas ;Leonard, Alexandre ;Marage, Pierre ;Thomas, Laurent ;Vander Velde, Catherine ;Vanlaer, Pascal ;Wang, Jian ;Charaf, Othman ;Dero, Vincent ;Hammad, Grégory ;Wickens, John H. ; [et al.]Référence Physical review letters, 108, 11, 111801
Publication Publié, 2012
Article révisé par les pairs
| Résumé : | 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=7TeV corresponding to an integrated luminosity of 2.2fb -1. In the context of the large-extra-dimensions model, lower limits are set on the effective Planck scale in the range of 2.3-3.8TeV 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 0.86-1.84TeV, for values of the associated coupling parameter between 0.01 and 0.10. |
