Search for extra dimensions using diphoton events in 7 TeV proton-proton collisions with the ATLAS detector
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 2.12 fb{sup -1} of {radical}s = 7 TeV proton-proton collisions. The diphoton invariant mass (m{sub {gamma}{gamma}}) 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/{ovr M}{sub 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/{ovr M}{sub Pl} = 0.01 (0.1) is 0.80 (1.95) TeV.
- Research Organization:
- Brookhaven National Lab. (BNL), Upton, NY (United States)
- Sponsoring Organization:
- USDOE SC OFFICE OF SCIENCE (SC)
- DOE Contract Number:
- DE-AC02-98CH10886
- OSTI ID:
- 1043415
- Report Number(s):
- BNL-98087-2012-JA; PYLBAJ; KA1101021; TRN: US1203145
- Journal Information:
- Physics Letters, (Section) B, Vol. 710, Issue 4-5; ISSN 0370-2693
- Country of Publication:
- United States
- Language:
- English
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