scholarly journals Enhancement of h→γγ in the Two Higgs Doublet Model Type I

2011 ◽  
Vol 696 (5) ◽  
pp. 447-453 ◽  
Author(s):  
P. Posch
Keyword(s):  
Higgs Doublet ◽  
Type I ◽  
Model Type ◽  
Doublet Model ◽  
Two Higgs Doublet Model

scholarly journals Type I + II seesaw in a Two Higgs Doublet Model

2019 ◽  
Vol 797 ◽  
pp. 134813 ◽  
Author(s):  
D. Cogollo ◽  
Ricardo D. Matheus ◽  
Téssio B. de Melo ◽  
Farinaldo S. Queiroz
Keyword(s):  
Higgs Doublet ◽  
Type I ◽  
Doublet Model ◽  
Two Higgs Doublet Model

scholarly journals Analysis of Top Quark Pair Production Signal from Neutral 2HDM Higgs Bosons at LHC

2018 ◽  
Vol 2018 ◽  
pp. 1-8
Author(s):  
Majid Hashemi ◽  
Mahbobeh Jafarpour
Keyword(s):  
Higgs Boson ◽  
Pair Production ◽  
Top Quark ◽  
Top Quarks ◽  
Higgs Doublet ◽  
Higgs Bosons ◽  
Type I ◽  
Final State ◽  
Doublet Model ◽  
Two Higgs Doublet Model

In this paper, the top quark pair production events are analyzed as a source of neutral Higgs bosons of the two Higgs doublet model type I at LHC. The production mechanism is pp→H/A→tt¯ assuming a fully hadronic final state through t→Wb→jjb. In order to distinguish the signal from the main background which is the standard model tt¯, we benefit from the fact that the top quarks in signal events acquire large Lorentz boost due to the heavy neutral Higgs boson. This feature leads to three collinear jets (a fat jet) which is a discriminating tool for identification of the top quarks from the Higgs boson resonances. Events with two identified top jets are selected and the invariant mass of the top pair is calculated for both signal and background. It is shown that the low tan β region has still some parts which can be covered by this analysis and has not yet been excluded by flavor physics data.

scholarly journals Flavor violating signatures of lighter and heavier Higgs bosons within the two Higgs doublet model type III at the LHeC

2016 ◽  
Vol 94 (5) ◽  
Author(s):  
S. P. Das ◽  
J. Hernández-Sánchez ◽  
S. Moretti ◽  
A. Rosado ◽  
R. Xoxocotzi
Keyword(s):  
Higgs Doublet ◽  
Higgs Bosons ◽  
Model Type ◽  
Type Iii ◽  
Doublet Model ◽  
Two Higgs Doublet Model

scholarly journals Unitarity constraints for Yukawa couplings in the two-Higgs-doublet model type III

2014 ◽  
Vol 29 (18) ◽  
pp. 1450085
Author(s):  
Andrés Castillo ◽  
Rodolfo A. Diaz ◽  
Jhon Morales
Keyword(s):  
Higgs Sector ◽  
Higgs Doublet ◽  
Mixing Angles ◽  
Model Type ◽  
Yukawa Couplings ◽  
Type Iii ◽  
Flavor Changing ◽  
Doublet Model ◽  
Two Higgs Doublet Model ◽  
Extended Higgs Sector

Unitarity constraints for Yukawa couplings are considered in the Two-Higgs-Doublet Model type III, by using a general expansion in partial waves for fermionic scattering processes. Constraints over general Flavor Changing Neutral Currents are found from that systematic, wherein such bounds compete with those coming from Lagrangian perturbativity requirement but are weaker than those imposed from phenomenological processes and precision tests. Nevertheless, for bounds based on unitarity, the number of assumptions is the lowest among phenomenological and theoretical limits. Indeed, these new theoretical constraints are independent of scalar masses or mixing angles for this extended Higgs sector, making them less model dependent.

scholarly journals New Light H± Discovery Channels at the LHC

Symmetry ◽  
2021 ◽  
Vol 13 (12) ◽  
pp. 2319
Author(s):  
Abdesslam Arhrib ◽  
Rachid Benbrik ◽  
Mohamed Krab ◽  
Bouzid Manaut ◽  
Stefano Moretti ◽  
...  
Keyword(s):  
Higgs Boson ◽  
Hadron Collider ◽  
Higgs Doublet ◽  
Charged Higgs Boson ◽  
Type I ◽  
Decay Channels ◽  
Charged Higgs ◽  
Doublet Model ◽  
Quark Decay ◽  
Two Higgs Doublet Model

A light charged Higgs boson has been searched for at the Large Hadron Collider (LHC) via top (anti)quark decay, i.e., t→bH+, if kinematically allowed. In this contribution, we propose new channels for light charged Higgs boson searches via the pair productions pp→H±h/A and pp→H+H− at the LHC in the context of the Two-Higgs Doublet Model (2HDM) Type-I. By focusing on a case where the heavy H state is the Standard Model (SM)-like one already observed, we investigate the production of the aforementioned charged Higgs bosons and their bosonic decay channels, namely, H±→W±h and/or H±→W±A. We demonstrate that such production and decay channels can yield substantial alternative discovery channels for H± bosons at the LHC. Finally, we propose eight benchmark points (BPs) to motivate the search for such signatures.

scholarly journals Leptonic decays of the B charged meson and B → Xsγ in the Two Higgs Doublet Model type III

2008 ◽  
Vol 38 (4) ◽  
pp. 531-535 ◽  
Author(s):  
J. P. Idárraga ◽  
R. Martinez ◽  
J-Alexis Rodríguez ◽  
N. Poveda T.
Keyword(s):  
Higgs Doublet ◽  
Model Type ◽  
Type Iii ◽  
Leptonic Decays ◽  
Charged Meson ◽  
Doublet Model ◽  
Two Higgs Doublet Model

scholarly journals Testing CP properties of extra Higgs states at the HL-LHC

2021 ◽  
Vol 2021 (3) ◽  
Author(s):  
Stefan Antusch ◽  
Oliver Fischer ◽  
A. Hammad ◽  
Christiane Scherb
Keyword(s):  
Cp Violation ◽  
Higgs Doublet ◽  
Type I ◽  
Final States ◽  
Current Standard ◽  
Boosted Decision Tree ◽  
Doublet Model ◽  
Two Higgs Doublet Model ◽  
Scalar Sector ◽  
Higgs State

Abstract Extra Higgs states appear in various scenarios beyond the current Standard Model of elementary particles. If discovered at the LHC or future colliders, the question will arise whether CP is violated or conserved in the extended scalar sector. An unambiguous probe of (indirect) CP violation would be the observation that one of the extra Higgs particles is an admixture of a CP-even and a CP-odd state. We discuss the possibility to discover scalar CP violation in this way at the high-luminosity (HL) phase of the LHC. We focus on the Two-Higgs Doublet Model of type I, where we investigate its currently allowed parameter region. Considering a benchmark point that is compatible with the current constraints but within reach of the HL-LHC, we study the prospects of determining the CP property of an extra neutral Higgs state H via the angular distribution of final states in the decay H→$$ \tau \overline{\tau} $$ τ τ ¯ . The analysis is performed at the reconstructed level, making use of a Boosted Decision Tree for efficient signal-background separation and a shape analysis for rejecting a purely CP-even or odd nature of H.

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