Search for the t → ch decay at hadron colliders

Arroyo-Ureña, M. A.; Gaitán-Lozano, R.; Herrera-Chacón, E.A.; Valencia-Pérez, T. A.

doi:10.1007/jhep07(2019)041

Cited by 10 publications

(6 citation statements)

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“…Table 2 summarizes the benchmark point for the parameters of our model to be used in the subsequent calculations. Furthermore, we set Top quark rare decays have been studied for several years as a means of searching for new physics [45][46][47], including various theoretical calculations for . As discussed previously, our model allows for FCNC couplings in the up sector; therefore, we can obtain a prediction for both the FCNC top quark and decays.…”

Section: Y Tcmentioning

confidence: 99%

A private SUSY 4HDM with FCNC in the up-sector

et al. 2021

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We present a SUSY model with four Higgs doublets of the "private type," in which all fermion types (up, down, and charged leptons) obtain their masses from a different Higgs doublet . The conditions for anomaly cancellation imply that the remaining Higgs doublet of the model ( ) must have the same hypercharge as , and thus, can only couple to up-type quarks, which opens the possibility to have FCNCs only in this sector. We study the Lagrangian of the model, and in particular, the Higgs potential, to identify the Higgs mass-eigenstates and their interactions; for the Yukawa matrices, we consider the four-texture case. We obtain constraints on the model parameters by using LHC measurements on the properties of the 125 GeV Higgs boson (h), and identify viable regions of the parameter space. Subsequently, these constraints are used to evaluate the prospects for detecting the FCNC decay mode at the future high-luminosity (HL) option for the LHC, which are compared with current limits from LHC-run2. Moreover, we evaluate the FCNC decay of the next heavier Higgs boson , which can typically reach . The search for the signal at HL-LHC is also studied, and it is found that it may be detectable for specific regions of the model parameter space.

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Section: Y Tcmentioning

confidence: 99%

A private SUSY 4HDM with FCNC in the up-sector

et al. 2021

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“…For a detailed account of this model and the study of its phenomenology we refer the readers to Refs. [24,25,26,27,28,29,30,33,32,31,34,35].…”

Section: Constraint On Free Model Parameter Space Of the Thdm-iii By ...mentioning

confidence: 99%

$\texttt{SpaceMath}$ version 1.0. $\\$ A $\texttt{Mathematica}$ package for beyond the standard model parameter space searches

Arroyo-Ureña¹,

Gaitán²,

Valencia-Pérez³

2020

Preprint

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We present a Mathematica package, called SpaceMath, for Beyond the Standard Model (BSM) parameter space searches which be agree with the most up-to-date experimental measurements. The physical observables implemented in SpaceMath are classified in five categories, namely, LHC Higgs boson data (LHC-HBD), Flavor-Violating Processes (FVP), Oblique Parameters (OP), Unitarity and perturbativity (UP) and Meson Physics (MP). Nevertheless, SpaceMath version 1.0 (SpaceMath v1.0) works only with LHC-HBD and with extended scalar sector models. Future versions will implement the observables previously mentioned.SpaceMath v1.0 is able to find allowed regions for free parameters of extension models by using LHC-HBD within a friendly interface and an intuitive environment in which users enter the couplings, set parameters and execute Mathematica in the traditional way. We present examples, step by step, in order to start new users in a fast and efficient way. To validate SpaceMath v1.0, we reproduce results reported in the literature.

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“…In the context of these models, it is worth studying any signal that could give clues for new physics (NP), such as the widely studied process φ → τ µ, with φ a CP -even or CP -odd scalar boson [3][4][5][6][7][8][9][10][11][12][13][14][15][16][17]. FCNC signals can also arise from the top quark decays t → cX (X = φ, γ, g, Z, H) [18][19][20][21][22][23][24][25][26], and from the less studied decay of a new heavy scalar boson into a top-charm quark pair [27], which could be searched at the LHC and the future high luminosity LHC (HL-LHC). The latter aims to increase the LHC potential capacity by reaching a luminosity up to L = 3000 fb −1 around 2035 [28].…”

Section: Introductionmentioning

confidence: 99%

Flavor changing flavon decay ɸ→tc (ɸ = HF, AF ) at the high luminosity large hadron collider

2023

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We present a study of the flavor changing decays φ → tc (φ = HF, AF ) of the CP-even and CP-odd scalar flavons at the large hadron collider and its next stage, the high-luminosity large hadron collider. The theoretical framework is an extension of the standard model that incorporates an extra complex singlet and invokes the Froggatt-Nielsen mechanism with an Abelian flavor symmetry. The projected exclusion and discovery regions in terms of the model parameters are reported. We find that AF could be detected at the LHC by considering a reasonable scenario of the model parameter space. As far as HF is concerned, we also found promising results that could be verified experimentally at the high-luminosity LHC.

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Search for the t → ch decay at hadron colliders

Cited by 10 publications

References 50 publications

A private SUSY 4HDM with FCNC in the up-sector

A private SUSY 4HDM with FCNC in the up-sector

$\texttt{SpaceMath}$ version 1.0. $\\$ A $\texttt{Mathematica}$ package for beyond the standard model parameter space searches

Flavor changing flavon decay ɸ→tc (ɸ = HF, AF ) at the high luminosity large hadron collider

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