NNLL resummation for stop pair-production at the LHC
W. BeenakkerInstitute of Physics, University of Amsterdam, Amsterdam, The NetherlandsChristoph BorschenskyInstitute for Theoretical Physics, WWU Münster, Münster, D-48149, GermanyRaphael HegerInstitute for Theoretical Physics, WWU Münster, Münster, D-48149, GermanyMichael KrämerInstitute for Theoretical Particle Physics and Cosmology, RWTH Aachen University, Aachen, D-52056, GermanyAnna KuleszaInstitute for Theoretical Physics, WWU Münster, Münster, D-48149, GermanyEric LaenenITF, Utrecht University, Leuvenlaan 4, Utrecht, 3584 CE, The Netherlands
2016en
ABI
Annotatsiya
The production of supersymmetric stop-antistop pairs at the Large Hadron Collider (LHC) is studied including corrections from soft-gluon resummation up to next-to-next-to-leading logarithmic (NNLL) accuracy in the Mellin-space approach. Additionally, corrections to the hard-matching coefficient at one-loop and Coulomb contributions at two-loop order are considered. The NNLL corrections enhance the cross section for all stop masses at centre-of-mass energies of 8 and 13 TeV compared to the previously calculated predictions at next-to-leading logarithmic (NLL) accuracy. Furthermore, a slight increase in the dependence on the additional stop-mixing parameters is observed.
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