A search for flavour changing neutral current (FCNC) processes in top-quark decays by the ATLAS Collaboration is presented. Data collected from pp collisions at the LHC at a centre-of-mass energy of ps = 7 TeV during 2011, corresponding to an integrated l

ATLAS COLLABORATION, G. AAD, MT DOVA ET AL

JOURNAL OF HIGH ENERGY PHYSICS

SPRINGER

Lugar: Berlin; Año: 2012 vol. 11 p. 33 - 53

1126-6708

This paper describes measurements of the sum of the transverse energy of particles as a function of particle pseudorapidity, , in proton-proton collisions at a centreof- mass energy, sqt s = 7TeV using the ATLAS detector at the Large Hadron Collider. The measurements are performed in the region jj < 4:8 for two event classes: those requiring the presence of particles with a low transverse momentum and those requiring particles with a signicant transverse momentum. In the second dataset measurements are made in the region transverse to the hard scatter. The distributions are compared to the predictions of various Monte Carlo event generators, which generally tend to underestimate the amount of transverse energy at high jj.