Transverse-momentum resummation for slepton-pair production at the CERN Large Hadron Collider

We perform a first precision calculation of the transverse-momentum ($q_T$) distribution of slepton pair and slepton-sneutrino associated production at the CERN Large Hadron Collider. We implement soft-gluon resummation at the next-to-leading logarithmic level and consistently match the obtained result to the pure fixed-order perturbative result at leading order in the QCD coupling constant, i.e. $\mathcal{O}({\alpha }_s)$. We give numerical predictions for ${\tilde{\tau }}_1{\tilde{\tau }}_1^{*}$ and ${\tilde{\tau }}_1{\tilde{\nu }}_{\tau }^{*}+{\tilde{\tau }}_1^{*}{\tilde{\nu }}_{\tau }$ production, also implementing recent parametrizations of nonperturbative effects. The results show a relevant contribution of resummation both in the small and intermediate $q_T$-regions and little dependence on unphysical scales and nonperturbative contributions.