Mr Alberto Tonero (SISSA/INFN)
Quark contact interactions are an important signal of new physics. A model in which the presence of a symmetry protects these new interactions from giving large corrections in flavor changing processes at low energies is introduced. It provides the basic set of operators which must be considered to contribute to the high-energy processes. The discussion of their experimental signature at the LHC, in the case where the number of contributing operators are just two, will be presented. For a representative integrated luminosity of 200 inverse pb and 7 TeV of center of mass energy, is it possible to show that the presence of two operators significantly modifies the bound on the characteristic energy scale of the contact interactions which is obtained by keeping a single operator.