Off-shell single-top-quark production in the Standard Model Effective Field Theory

Neumann, Tobias; Sullivan, Zack Edward

doi:10.1007/JHEP06(2019)022

Title: Off-shell single-top-quark production in the Standard Model Effective Field Theory

Journal Article · 07 June 2019 · Journal of High Energy Physics (Online)

DOI: https://doi.org/10.1007/JHEP06(2019)022 · OSTI ID:1527398

^[1]; Sullivan, Zack Edward ^[2]

Illinois Institute of Technology, Chicago, IL (United States); Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
Illinois Institute of Technology, Chicago, IL (United States)

We present a fully differential and spin-dependent t-channel single-top-quark calculation at next-to-leading order (NLO) in QCD including off-shell effects by using the complex mass scheme in the Standard Model (SM) and in the Standard Model Effective Field Theory (SMEFT). We include all relevant SMEFT operators at 1/Λ$$^{2}$$ that contribute at NLO in QCD for a fully consistent comparison to the SM at NLO. In addition, we include chirality flipping operators that do not interfere with the SM amplitude and contribute only at 1/Λ$$^{4}$$ with a massless b-quark. Such higher order effects are usually captured by considering anomalous right-handed Wtb and left-handed Wtb tensor couplings. Despite their formal suppression in the SMEFT, they describe an important class of models for new physics. Our calculation and analysis framework is publicly available in MCFM.

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Research Organization:: Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States)

Sponsoring Organization:: USDOE Office of Science (SC), High Energy Physics (HEP)

Grant/Contract Number:: AC02-07CH11359; SC0008347

OSTI ID:: 1527398

Report Number(s):: arXiv:1903.11023; FERMILAB-PUB-19-119-T; IIT-CAPP-19-01; 1726755

Journal Information:: Journal of High Energy Physics (Online), Vol. 2019, Issue 6; ISSN 1029-8479

Publisher:: Springer BerlinCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 21 works

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