Higgs probes of top quark contact interactions and their interplay with the Higgs self-coupling Alasfar, Lina Blas Mateo, Jorge de Higgs properties SMEFT We would like to thank Ayan Paul for providing functions used in [78] that facilitated making some of the plots shown in this paper. L.A. thanks the computing resources provided by DESY and the INFN, Sezione di Padova, for hospitality during the final stage of this work. R.G. would like to thank Pier Paolo Giardino, Ken Mimasu, Paride Paradisi and Eleni Vryonidou for interesting discussions on C ~ and the four-fermion operators considered. L.A.'s research is supported by the Deutsche Forschungsgemeinschaft (DFG) Projektnummer 417533893/GRK2575 "Rethinking Quantum Field Theory". The work of J.B. has been supported by the FEDER/Junta de Andalucia project grant P18-FRJ-3735. We calculate the dominant contributions of third generation four-quark operators to single-Higgs production and decay. They enter via loop corrections to Higgs decays into gluons, photons and bb, and in Higgs production via gluon fusion and in association with top quark pairs. We show that these loop effects can, in some cases, lead to better constraints than those from fits to top quark data. Finally, we investigate whether these four-fermion operators can spoil the determination of the trilinear Higgs self-coupling from fits to single-Higgs data. 2022-06-07T10:47:42Z 2022-06-07T10:47:42Z 2022-05-17 journal article Alasfar, L., de Blas, J. & Gröber, R. Higgs probes of top quark contact interactions and their interplay with the Higgs self-coupling. J. High Energ. Phys. 2022, 111 (2022). [https://doi.org/10.1007/JHEP05(2022)111] http://hdl.handle.net/10481/75305 10.1007/JHEP05(2022)111 eng http://creativecommons.org/licenses/by/3.0/es/ open access Atribución 3.0 España Springer