Double Higgs boson production as an exclusive probe for a sequential fourth generation with wrong-sign Yukawa couplings

It has been shown that the data from the Large Hadron Collider (LHC) does not rule out a chiral sequential fourth generation of fermions that obtain their masses through an identical mechanism as the other three generations do. However, this is possible only if the scalar sector of the Standard Mode...

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Published in:arXiv.org 2020-04
Main Authors: Raju, Md, Jyoti Prasad Saha, Das, Dipankar, Kundu, Anirban
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Couplings
Cross-sections
Fermions
Large Hadron Collider
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Jyoti Prasad Saha
Das, Dipankar
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description It has been shown that the data from the Large Hadron Collider (LHC) does not rule out a chiral sequential fourth generation of fermions that obtain their masses through an identical mechanism as the other three generations do. However, this is possible only if the scalar sector of the Standard Model is suitably enhanced, like embedding it in a type-II two-Higgs doublet model. In this article, we try to show that double Higgs production (DHP) can unveil the existence of such a hidden fourth generation in a very efficient way. While the DHP cross-section in the SM is quite small, it is significantly enhanced with a fourth generation. We perform a detailed analysis of the dependence of the DHP cross-section on the model parameters, and show that either a positive signal of DHP is seen in the early next run of the LHC, or the model is ruled out.
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subjects Couplings
Cross-sections
Fermions
Large Hadron Collider
title Double Higgs boson production as an exclusive probe for a sequential fourth generation with wrong-sign Yukawa couplings
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