Unparticle physics at hadron collider via dilepton production

TL;DR

This paper investigates how unparticle physics, a scale-invariant extension of the Standard Model, could influence dilepton production at hadron colliders like the LHC, emphasizing the importance of QCD corrections for accurate predictions.

Contribution

It provides the first detailed analysis of QCD corrections to unparticle effects in dilepton production at the LHC, including K-factors and stability of cross sections.

Findings

QCD corrections stabilize the dilepton production cross section.

Inclusion of NLO QCD corrections reduces scale dependence.

Unparticle effects could be detectable via modified dilepton spectra.

Abstract

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.