Update of the electroweak precision fit, interplay with Higgs-boson signal strengths and model-independent constraints on new physics

Creators: Ciuchini, Marco; Franco, Enrico; Mishima, Satoshi; Pierini, Maurizio; Reina, Laura; Silvestrini, Luca

Abstract

We present updated global fits of the Standard Model and beyond to electroweak precision data, taking into account recent progress in theoretical calculations and experimental measurements. From the fits, we derive model-independent constraints on new physics by introducing oblique and epsilon parameters, and modified Zbb and HVV couplings. Furthermore, we also perform fits of the scale factors of the Higgs-boson couplings to observed signal strengths of the Higgs boson.

Additional Information

© 2015 Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/). Available online 31 May 2016. M.C. is associated to the Dipartimento di Matematica e Fisica, Università di Roma Tre, and E.F. and L.S. are associated to the Dipartimento di Fisica, Università di Roma "La Sapienza". We thank J. de Blas and D. Ghosh for useful discussions and comments. The research leading to these results has received funding from the European Research Council under the European Union's Seventh Framework Programme (FP/2007-2013) / grants n. 267985 and n. 279972. The work of L.R. is supported in part by the U.S. Department of Energy under grant DE-FG02-13ER41942.

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