First measurement of hadronic event shapes in pp collisions at s=7TeV

Hadronic event shapes have been measured in proton-proton collisions at s=7TeV, with a data sample collected with the CMS detector at the LHC. The sample corresponds to an integrated luminosity of 3.2pb−1. Event-shape distributions, corrected for detector response, are compared with five models of QCD multijet production.