P. Francavilla (INFN Pisa),"First QCD results in ATLAS"

Tuesday 30 Nov 2010, 15:00 → 17:00 Europe/Rome

131 (INFN Edicifio C)

Jets produced in the hadronization of quarks and gluons play a central role in the rich physics program that will be covered by the ATLAS experiment at the LHC, and are central elements of the signature for many physics channels. The jet production is by far the hard scattering process with the largest cross section and it has been measured with the ATLAS detector in proton-proton collisions at center-of-mass energy of 7 TeV. A precise measurement of the jet cross sections is important, not only as a measurement in se to be compared with the QCD predictions, but also to have reliable estimate of a major source of background in search of new physics signals. Moreover jets in final state could be themselves signature of several new physics processes such as supersymmetry or extra dimensions. The ATLAS experiment is carrying out a program to measure the jet cross sections, such as the inclusive single jet cross section, the dijet cross section and the multijet cross section. The various ingredients necessary for this measurement will be discuss in the seminar, and the first results on jet cross section and jet properties will be shown.

Slides SeminarioFrancavilla30-11-2010_NB.pdf