Three new physics resonances with top flavor-changing couplings are mapped to SMEFT operators at the electroweak scale and their phenomenology is analyzed.
NNLO QCD Corrections to t-channel Single Top-Quark Production and Decay
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abstract
We present a fully differential next-to-next-to-leading order calculation of t-channel single top-quark production and decay at the LHC under narrow-width approximation and neglecting cross-talk between incoming protons. We focus on the fiducial cross sections at 13 TeV, finding that the next-to-next-to-leading order QCD corrections can reach the level of -6%. The scale variations are reduced to the level of a percent. Our results can be used to improve experimental acceptance estimates and the measurements of the single top-quark production cross section and the top-quark electroweak couplings.
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The report reviews progress since 2021 in fixed-order computations for LHC applications and identifies processes requiring missing higher-order corrections to match anticipated experimental precision.
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Exploring new resonances with direct top flavor changing interactions
Three new physics resonances with top flavor-changing couplings are mapped to SMEFT operators at the electroweak scale and their phenomenology is analyzed.
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Les Houches 2023 -- Physics at TeV Colliders: Report on the Standard Model Precision Wishlist
The report reviews progress since 2021 in fixed-order computations for LHC applications and identifies processes requiring missing higher-order corrections to match anticipated experimental precision.