If supersymmetry near the TeV scale is realized in Nature, the pair production of scalar top squarks is expected to be observable at the Large Hadron Collider. Recently, effective field-theory methods were employed to obtain approximate predictions for the cross section for this process, which include soft-gluon emission effects up to next-to-next-to-leading order (NNLO) in perturbation theory. In this work we employ the same techniques to resum soft-gluon emission effects to all orders in perturbation theory and with next-to-next-to-logarithmic (NNLL) accuracy. We analyze the effects of NNLL resummation on the stop-pair production cross section by obtaining NLO+NNLL predictions in pair invariant mass and one-particle inclusive kinematics. We compare the results of these calculations to the approximate NNLO predictions for the cross sections.
@article{arxiv.1312.4540,
title = {NNLL Momentum-Space Resummation for Stop-Pair Production at the LHC},
author = {Alessandro Broggio and Andrea Ferroglia and Matthias Neubert and Leonardo Vernazza and Li Lin Yang},
journal= {arXiv preprint arXiv:1312.4540},
year = {2015}
}