Searches for additional Higgs bosons at the LHC

At the core of any theoretical description of hadron collider physics is a fixed-order perturbative treatment of a hard scattering process. This chapter is devoted to a survey of fixed-order predictions for a wide range of Standard Model processes. These range from high cross-section processes such as jet production to much more elusive reactions, such as the production of Higgs bosons. Process by process, these sections illustrate how the techniques developed in Chapter 3 are applied to more complex final states and provide a summary of the fixed-order state-of-the-art. In each case, key theoretical predictions and ideas are identified that will be the subject of a detailed comparison with data in Chapters 8 and 9.

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Higgs Bosons in the Early Universe. Dimensionality of Our Space. Part 1. Steady State of a Higgs Universe with Maximum Entropy

Russian Physics Journal ◽

10.1007/s11182-013-0062-0 ◽

2013 ◽

Vol 56 (5) ◽

pp. 504-514 ◽

Cited By ~ 1

Author(s):

V. V. Skobelev

Keyword(s):

Steady State ◽

Maximum Entropy ◽

Early Universe ◽

Higgs Bosons

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Highly boosted Higgs bosons and unitarity in vector-boson fusion at future hadron colliders

Journal of High Energy Physics ◽

10.1007/jhep05(2021)198 ◽

2021 ◽

Vol 2021 (5) ◽

Author(s):

Wolfgang Kilian ◽

Sichun Sun ◽

Qi-Shu Yan ◽

Xiaoran Zhao ◽

Zhijie Zhao

Keyword(s):

Pair Production ◽

Vector Boson ◽

New Physics ◽

Higgs Bosons ◽

Vector Boson Fusion ◽

Final State ◽

Proton Proton ◽

Effective Lagrangian ◽

Discovery Potential ◽

New Interactions

Abstract We study the observability of new interactions which modify Higgs-pair production via vector-boson fusion processes at the LHC and at future proton-proton colliders. In an effective-Lagrangian approach, we explore in particular the effect of the operator $$ {h}^2{W}_{\mu \nu}^a{W}^{a,\mu \nu} $$ h 2 W μν a W a , μν , which describes the interaction of the Higgs boson with transverse vector-boson polarization modes. By tagging highly boosted Higgs bosons in the final state, we determine projected bounds for the coefficient of this operator at the LHC and at a future 27 TeV or 100 TeV collider. Taking into account unitarity constraints, we estimate the new-physics discovery potential of Higgs pair production in this channel.

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The forgotten channels: charged Higgs boson decays to a W± and a non-SM-like Higgs boson

Journal of High Energy Physics ◽

10.1007/jhep06(2021)183 ◽

2021 ◽

Vol 2021 (6) ◽

Author(s):

Henning Bahl ◽

Tim Stefaniak ◽

Jonas Wittbrodt

Keyword(s):

Higgs Boson ◽

Higgs Sector ◽

Higgs Doublet ◽

Charged Higgs Boson ◽

Higgs Bosons ◽

Type I ◽

Collider Phenomenology ◽

Charged Higgs ◽

Charged Higgs Bosons ◽

Almost All

Abstract The presence of charged Higgs bosons is a generic prediction of multiplet extensions of the Standard Model (SM) Higgs sector. Focusing on the Two-Higgs-Doublet-Model (2HDM) with type I and lepton-specific Yukawa sectors, we discuss the charged Higgs boson collider phenomenology in the theoretically and experimentally viable parameter space. While almost all existing experimental searches at the LHC target the fermionic decays of charged Higgs bosons, we point out that the bosonic decay channels — especially the decay into a non-SM-like Higgs boson and a W boson — often dominate over the fermionic channels. Moreover, we revisit two genuine BSM effects on the properties of the discovered Higgs boson — the charged Higgs contribution to the diphoton rate and the Higgs decay to two light Higgs bosons — and their implication for the charged Higgs boson phenomenology. As main result of the present paper, we propose five two-dimensional benchmark scenarios with distinct phenomenological features in order to facilitate the design of dedicated LHC searches for charged Higgs bosons decaying into a W boson and a light, non-SM-like Higgs boson.

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