HEPfit is a flexible open-source tool which, given the Standard Model or any of its extensions, allows to (i) fit the model parameters to a given set of experimental observables; (ii) obtain predictions for observables. HEPfit can be used either in Monte Carlo mode, to perform a Bayesian Markov Chain Monte Carlo analysis of a given model, or as a library, to obtain predictions of observables for a given point in the parameter space of the model, allowing HEPfit to be used in any statistical framework. In the present version, around a thousand observables have been implemented in the Standard Model and in several new physics scenarios. In this paper, we describe the general structure of the code as well as models and observables implemented in the current release.

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We evaluate the implications of LHC and LEP/SLC measurements for the electro-weak couplings of the top and bottom quarks. We derive global bounds on the Wilson coefficients of ten two-fermion operators in an effective field theory description. The combination of hadron collider data with Z-pole measurements is found to yield tight limits on the operator coefficients that modify the left-handed couplings of the bottom and top quark to the Z boson. We also present projections for the high-luminosity phase of the LHC and for future electron-positron colliders. The bounds on the operator coefficients are expected to improve substantially during the remaining LHC programme, by factors of 1 to 5 if systematic uncertainties are scaled as statistical ones. The operation of an e + e − collider at a center-of-mass energy above the top-quark pair production threshold is expected to further improve the bounds by one to two orders of magnitude. The combination of measurements in pp and e + e − collisions allows for a percent-level determination of the top-quark Yukawa coupling, that is robust in a global fit.

We show how minimally-coupled matter fields of arbitrary spin, when coupled to Ricci-Based Gravity theories, develop non-trivial effective interactions that can be treated perturbatively only below a characteristic high-energy scale ΛQ. Our results generalize to arbitrary matter fields those recently obtained for spin 1/2 fields in [1]. We then use this interactions to set bounds on the high-energy scale ΛQ that controls departures of Ricci-Based Gravity theories from General Relativity. Particularly, for Eddington-inspired Born-Infeld gravity we obtain the strong bound |κ| < 10 −26 m 5 kg −1 s −2 . PACS numbers: arXiv:1907.05615v1 [hep-th] 12 Jul 2019 3 With the well known exception of Lovelock theories [65]. 4 Known as Einstein-Cartan-Sciamma-Kibble or ECKS theory. 5 If one considers coupling spinors to GR this is not strictly true, since there arise torsion corrections sourced by spin-density. 6 In fact, the class of RBG theories, which contains f (R) theories, can be defined as the most general class of theories with projective symmetry and whose Lagrangian is given by an analytic scalar function of the metric and the Ricci tensor.

We analyze the constraints on coloured scalar bosons imposed by the current LHC data at √ s = 13 TeV. Specifically, we consider an additional electroweak doublet of colouroctet scalars, satisfying the principle of Minimal Flavour Violation in order to fulfill the stringent experimental limits on flavour-changing neutral currents. We demonstrate that coloured scalars with masses below 800 GeV are already excluded, provided they are not fermiophobic. *