Upsilon(1S) Production In Proton-Proton Collisions at Center of Mass Energy 7 TeV

A measurement of the cross section for $\Upsilon(1S)$ production in proton-proton collisions at center of mass energy 7 TeV is presented. The measurement covers the rapidity ranges $|y^{\Upsilon}|<1.2$ and $1.2<|y^{\Upsilon}|<2.4$ in the transverse momentum range $p_{T}^{\Upsilon}$ $<$ 26 GeV. The results are based on an integrated luminosity of approximately 1.2pb$^{-1}$, collected with the ATLAS dectector at the Large Hadron Collider. The signal extraction uses templates derived from data to model the continuum background. Results are compared to predictions from next-to-leading order perturbative QCD calculations.