Measurements of jet vetoes and azimuthal decorrelations in dijet events produced in pp collisions at s=7TeV using the ATLAS detector

Additional jet activity in dijet events is measured using pp$${pp}$$ collisions at ATLAS at a centre-of-mass energy of 7TeV$$7\,\mathrm{TeV}$$, for jets reconstructed using the anti-kt$${\mathrm{anti}\hbox {-}{k_t}}$$ algorithm with radius parameter R=0.6$${R=0.6}$$. This is done using variables suc