Search for Extra Dimensions in diphoton events using proton-proton collisions recorded at sqrt(s) = 7 TeV with the ATLAS detector at the LHC

Understand

The large difference between the Planck scale and the electroweak scale, known as the hierarchy problem, is addressed in certain models through the postulate of extra spatial dimensions.

• A search for evidence of extra spatial dimensions in the diphoton channel has been performed using the full set of proton-proton collisions at sqrt(s) = 7 TeV recorded in 2011 with the ATLAS detector at the CERN Large Hadron Collider.
• This dataset corresponds to an integrated luminosity of 4.9 fb.
• The diphoton invariant mass spectrum is observed to be in good agreement with the Standard Model expectation.