Search for extra dimensions using diphoton events in 7 TeV proton-proton collisions with the ATLAS detector

Journal article

Using data recorded in 2011 with the ATLAS detector at the Large Hadron Collider, a search for evidence of extra spatial dimensions has been performed through an analysis of the diphoton final state. The analysis uses data corresponding to an integrated luminosity of 2.12fb-1 of s=7TeV proton-proton collisions. The diphoton invariant mass (mγγ) spectrum is observed to be in good agreement with the expected Standard Model background. In the large extra dimension scenario of Arkani-Hamed, Dimopoulos and Dvali, the results provide 95% CL lower limits on the fundamental Planck scale between 2.27 and 3.53 TeV, depending on the number of extra dimensions and the theoretical formalism used. The results also set 95% CL lower limits on the lightest Randall-Sundrum graviton mass of between 0.79 and 1.85 TeV, for values of the dimensionless coupling k/-1 Pl varying from 0.01 to 0.1. Combining with previously published ATLAS results from the dielectron and dimuon final states, the 95% CL lower limit on the Randall-Sundrum graviton mass for k/M-1Pl=0.01 (0.1) is 0.80 (1.95) TeV. © 2012 CERN.

Authors: Aad, G; Abbott, B; Abdallah, J; Abdelalim, A; Abdesselam, A

• Journal: Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
• Volume: 710
• Issue: 4-5
• Pages: 538-556
• Publication date: 2012-04-20
• DOI: 10.1016/j.physletb.2012.03.022
• ISSN: 0370-2693