Unparticle physics at hadron collider via dilepton production

The scale invariant unparticle physics recently proposed by Georgi could manifest at low energies as non-integral number d(u) of invisible particles. Unparticles if existing, could couple to the Standard Model fields and consequently affect the collider phenomenology. We consider the DY process to explore effects of the peculiar propagator of the scalar and tensor unparticle operators. To probe these effects at hadron collider one needs to go beyond LO in QCD and hence the quantitative impact of QCD corrections for unparticle physics at LHC is investigated. We present the K-factors at LHC. Inclusion of QCD corrections to NLO stabilises the cross section with respect to scale variations. (c) 2007 Elsevier B.V. All rights reserved.