Search for Large extra spatial dimensions in the dielectron and diphoton channels in $\bm{p\bar{p}}$ collisions at $\bm{\sqrt{s}=}$1.96 TeV

Understand

We report on a search for large extra spatial dimensions in the dielectron and diphoton channels using a data sample of 1.05 \invfb of \ppb collisions at a center-of-mass energy of 1.96 TeV collected by the D0 detector at the Fermilab Tevatron Collider.

• The invariant mass spectrum of the data agrees well with the prediction of the standard model.
• We find 95% C.L.
• lower limits on the effective Planck scale between 2.1 and 1.3 TeV for 2 to 7 extra dimensions.