9
views
0
recommends
+1 Recommend
0 collections
    0
    shares
      • Record: found
      • Abstract: found
      • Article: found
      Is Open Access

      NNLO QCD Corrections to the Drell-Yan Cross Section in Models of TeV-Scale Gravity

      Preprint

      Read this article at

      Bookmark
          There is no author summary for this article yet. Authors can add summaries to their articles on ScienceOpen to make them more accessible to a non-specialist audience.

          Abstract

          The first results on the complete next-to-next-to-leading order (NNLO) Quantum Chromodynamic (QCD) corrections to the production of di-leptons at hadron colliders in large extra dimension models with spin-2 particles are reported in this article. In particular, we have computed these corrections to the invariant mass distribution of the di-leptons taking into account all the partonic subprocesses that contribute at NNLO. In these models, spin-2 particles couple through the energy-momentum tensor of the Standard Model (SM) with the universal coupling strength. The tensorial nature of the interaction and the presence of both quark annihilation and gluon fusion channels at the Born level make it challenging computationally and interesting phenomenologically. We have demonstrated numerically the importance of our results at the Large Hadron Collider (LHC) energies. The two loop corrections contribute an additional 10\% to the total cross section. We find that the QCD corrections are not only large but also important to make the predictions stable under renormalisation and factorisation scale variations providing an opportunity to stringently constrain the parameters of the models with a spin-2 particle.

          Related collections

          Most cited references4

          • Record: found
          • Abstract: not found
          • Article: not found

          Reliable Perturbative Results for Strong Interactions?

            Bookmark
            • Record: found
            • Abstract: found
            • Article: found
            Is Open Access

            PDF and scale uncertainties of various DY distributions in ADD and RS models at hadron colliders

            In the extra dimension models of ADD and RS we study the dependence of the various parton distribution functions on observable of Drell-Yan process to NLO in QCD at LHC and Tevatron energies. Uncertainties at LHC due to factorisation scales in going from leading to next-to-leading order in QCD for the various distributions get reduced by about 2.75 times for a \(\mu_F\) range \(0.5 ~Q < \mu_F < 1.5 ~Q\). Further uncertainties arising from the error on experimental data are estimated using the MRST parton distribution functions.
              Bookmark
              • Record: found
              • Abstract: found
              • Article: found
              Is Open Access

              Next-to-Leading Order QCD Corrections to the Drell-Yan Cross Section in Models of TeV-Scale Gravity

              The first results on next-to-leading order QCD corrections to graviton-induced processes in hadron collisions in models of TeV-scale gravity are presented focusing on the case of dilepton pair production in \bar p p and pp collisions. Distributions in the invariant mass Q, the longitudinal fraction x_F, the rapidity Y and the forward-backward asymmetry of the lepton pair are studied. The quantitative impact of the QCD corrections for searches of extra dimensions at hadron colliders is investigated. It turns out that at the LHC (\sqrt{S}=14 TeV) the K-factor is rather large (K=1.6) for large invariant mass Q of the lepton pair, indicating the importance of accounting for these QCD corrections in the experimental search for TeV-scale gravity. At the Tevatron, the K-factor does not substantially deviate from the Standard Model value. However, its inclusion is necessitated to make the cross-section stable with respect to scale variations.
                Bookmark

                Author and article information

                Journal
                2016-06-27
                Article
                10.1140/epjc/s10052-016-4587-6
                1606.08454
                94f69878-6eb2-400a-9373-0e3c80759695

                http://arxiv.org/licenses/nonexclusive-distrib/1.0/

                History
                Custom metadata
                53 pages, 19 figures
                hep-ph hep-ex

                High energy & Particle physics
                High energy & Particle physics

                Comments

                Comment on this article