Precision QCD phenomenology of exotic spin-2 search at the LHC

Abstract

The complete next-to-next-to leading order (NNLO) QCD correction matched with next-to-next-to leading logarithm (NNLL) has been studied for Drell-Yan production via spin-2 particle at the Large hadron collider (LHC). We consider generic spin-2 particle which couples differently to quarks and gluons (non-universal scenario). The threshold enhanced analytical coefficient has been obtained up to third order using the universal soft function and the process dependent form factors at the same order. We performed a detailed phenomenological analysis and gave a prediction for the 13 TeV LHC for the search of such BSM signature. We found that the resummed result gives sizeable corrections over a wide range of invariant mass of the lepton pair. The scale variation also stabilizes at this order and reduces to 4%. As a by-product, we also provide ingredients for third-order soft-virtual (SV) prediction as well as resummation and study the impact on LHC searches.

Threshold enhanced cross sections for colorless productions

“…A general framework has been provided for arbitrary color singlet production in [46,47]. Beyond the SM (BSM), these are also studied for a wide range of models and stringent bounds have been obtained with models parameters with precise N 3 LL results [48][49][50][51][52][53][54][55][56][57][58]. However, one also needs to match the threshold logarithmic contributions with the FO results to capture the sub-leading terms which become important at higher orders as well.…”