The first part is the twohiggsdoublet model potential which describe the self interactions of the two higgs doublets. The program features simple conversion between different parametrizations of the 2hdm potential, a flexible yukawa sector specification with choices of different z2. The two higgs doublet model 2hdm has been extensively studied for more than twenty years, even though it has often been only considered as the scalar sector of larger models like the mssm \citegunion. Solving the muon g 2 anomaly in two higgs doublet models. There are four types of 2hdms with different scenarios of higgsfermion couplings. One of the motivations for the two higgs doublet model is supersymmetry where each particle has a superpartner.
For simplicity you can work with two generations when the third generation is not explicitly needed. We analyse a class of cpv 2hdm of typei in which only one of the two higgs doublets couples to quarks and leptons, avoiding dangerous flavour changing neutral currents. Light higgs boson production in two higgs doublets models. Analysis of top quark pair production signal from neutral.
Finally we note that in addition to the above parame. In particle physics, composite higgs models chm are speculative extensions of the standard model sm where the higgs boson is a bound state of new strong interactions. Trilinear higgs couplings in the two higgs doublet model. Download citation 2hdmc twohiggsdoublet model calculator this manual describes the public code 2hdmc which can be used to perform calculations in a general, cpconserving, twohiggs. But it is by no means excluded that the higgs sector is larger than that of the sm. Two higgs doublet model consider the two higgs doublet model 2hdm extension of the sm. Four types of the model i, ii, x and y are comprehensively studied.
Finally, in section v we state our concluding remarks. Status of the charged higgs boson in two higgs doublet models. We present the program 2hdmc and how it can be used to explore the physics of general cpconserving two higgs doublet models. Search for a twohiggsboson doublet using a simplified model.
Higgsstrahlung in the twohiggsdoubletmodel 2hdm team. In the past, many different constraints on this model have been explored. Namely, instead of the one higgs eld of the sm we now have two, denoted by. In this thesis, we develop a model that extends scalar sector of two higgs doublet model by adding a coloroctet scalar. With these conventions the couplings of higgs and electroweak gauge bosons are given by the invariant sb a sinb a and cb a cosb a. In the typeii model, a light a has a large bottom yukawa coupling for large tan. After spontaneous breaking of the sm gauge symmetry, the higgs spectrum of the model consists of three neutral higgs bosons and two charged higgs bosons. This manual describes the public code 2hdmc which can be used to perform calculations in a general, cpconserving, twohiggsdoublet model 2hdm. Search for a twohiggsboson doublet using a simplified. We start with an overview of the appearance of divergences in higherorder calculations in sec. The massive spin1 particles can have three polarizations, two transverse and one longitudinal. Renormalization of the two higgs doublet model the consequences of the alternative tadpole scheme are best observed by considering a speci c example. Two higgs doublet model 2hdm the 2hdm includes a second scalar doublet, with each doublet acquiring a vacuum expectation value different from zero. At the moment, only the cpconserving 2hdm has been implemented.
Two higgs doublet model and model independent interpretation. The two higgs doublet model 2hdm has been extensively studied for more than twenty years now, even though it has often been only considered as the scalar sector of some larger model, like the mssm or some little higgs models for example. In both cases the electroweak symmetry is broken by the condensation of a higgs scalar doublet. It avoids potentially large flavour changing neutral currents. Two higgs doublet model how is two higgs doublet model. This results in five higgs bosons, two cpeven, one cpodd and a charged higgs boson and its antiparticle. Citeseerx document details isaac councill, lee giles, pradeep teregowda. Lee, 73 two higgs doublet model 2hdm proposed by t.
This is the purpose of the twohiggsdoublet model calculator 2hdmc which we describe here. Trilinear higgs couplings in the two higgs doublet model with cp violation per osland department of physics and technology, university of bergen, postboks 7803, n5020 bergen, norway p. There are also models with more than two higgs doublets, for example three higgs doublet models etc. Citeseerx 2hdmc a two higgs doublet model calculator. Poskmi2017002 flavor physics in general two higgs doublet model kazuhiro tobe note that the nonzero rmt e andor r tm e can explain the cms excess. It allows parametrization of the higgs potential in many different ways, convenient specification of generic yukawa sectors, the evaluation of decay widths including higherorder qcd corrections, theoretical constraints and much more. The renormalization of the twohiggsdoublet model in chapter 4 forms the main part of this thesis. The aim is to compare sources of charged higgs pair through the above processes, that is, double and triple higgs production. At the moment, only the cp conserving 2hdm has been implemented. The twohiggsdoublet model 2hdm has been extensively studied for more than twenty years, even though it has often been only considered as the scalar sector of larger models like the mssm \citegunion.
If you have a user account, you will need to reset your password the next time you login. In this model we add a higgs doublet to the sm elds. In the first type of scenario there is no a priori reason why the higgs boson is lighter. With a second higgs doublet, quantum corrections can soften the neutrino mass hierarchy.
The two higgs doublet model 2hdm is one of the simplest extensions of the sm. The extension of twohiggsdoublet model with a color. Two higgs doublet models for the lhc higgs boson data at s. In two higgs doublet models we introduce a downtype higgs as well as an up type higgs and typically as i understand it we take the downtype to be the 126 gev resonance and the up type to be somewhat heavier, around the tev scale. The production of triple higgs, and pairwise charged higgs boson is studied in the context of future linear colliders within the twohiggsdoublet model 2hdm type ii. There are already many excellent literatures focusing on this issue. Softly broken two higgs doublet model pdf free files. Introduce a second higgs doublet even if at tree level m 3 m 2 is very large, as generically expected in the standard seesaw mechanism, the quantum corrections can generate m 3 m 2 6. Search for a heavy scalar boson in the 2 higgs doublet model with the atlas detector ernis, gunar cernthesis2015280 added. P and t odd nucleonnucleon interaction in a two higgs.
The existence of charged higgs bosons is inevitable in models with two or more higgs doublets. Such models allow for treelevel cp violation cpv in the higgs sector. For instance, the twohiggsdoublet model thdm is attractive since. Apr 08, 2016 two higgs doublet models 2hdms are amongst the simplest extensions of the standard model. Trilinear higgs couplings in the two higgs doublet model with. If both rmt e and r tm e couplings are nonzero, the feynman diagram shown in the left. We shall assume that the underlying gauge group is the sm gauge group. Hence, their discovery would constitute unambiguous evidence for new physics beyond the standard model sm.
Download citation 2hdmc a two higgs doublet model calculator we present the program 2hdmc and how it can be used to explore the physics of general cp conserving two higgs doublet models. Download citation 2hdmc twohiggsdoublet model calculator this manual describes the public code 2hdmc which can be used to perform calculations in a general, cpconserving, two higgs. Physical constraints on higgs masses and quartic couplings. A two higgs doublet model with tree level natural flavor conservation can lead to p and t odd nucleonnucleon nn interaction through tree level feynman.
On the renormalization of the twohiggsdoublet model. Sources of charged higgs pair through double or triple. From that, we can generalize the result to the whole scalar sector and eventually, to the complete two higgs doublet model. The higgs potential in 2hdmc can be specified in different parametrizations, allowing for everyone to use their own favorite. The extension of twohiggsdoublet model with a coloroctet. Updated lhc data on the new 126 gev boson during the 7 and 8 tev runnings strengthen the standard model higgs boson interpretation further. The ratio of vacuum expectation values of the two higgs doublets is a.
The program features simple conversion between different parametrizations of the 2hdm potential, a flexible. These scenarios are models for physics beyond the sm presently tested at the large hadron collider lhc in geneva in all composite higgs models the recently discovered higgs boson is not an elementary particle or point. In this thesis, we develop a model that extends scalar sector of twohiggsdoublet model by adding a coloroctet scalar. It adds a second higgs doublet to the sm particle content. The first part is the two higgs doublet model potential which describe the self interactions of the two higgs doublets. For instance, the twohiggsdoublet model thdm is attractive since it provides a viable framework for spontaneous cp violation. This manual describes the public code 2hdmc which can be used to perform calculations in a general, cpconserving, two higgs doublet model 2hdm. Sep 18, 2014 updated lhc data on the new 126 gev boson during the 7 and 8 tev runnings strengthen the standard model higgs boson interpretation further. We consider the twohiggsdoublet model thdm where the standard model sm field content is extended by adding a further higgsboson doublet. Lee deshpande, ma, 78 two higgs doublet model 2hdm. The barrzee two loop 10 can give a dominant positive contribution to the muon g. This model provides a simple uvcomplete perturbative extension of the sm, which we can view as the lowenergy higgs sector of more fundamental theories such as the minimal supersymmetric standard model mssm 12, guts 14,15, composite higgs models 1618, and little higgs models 19,20.
Twohiggsdoublet models 2hdms are amongst the simplest extensions of the standard model. It allows parametrization of the higgs potential in many different ways, convenient specification of generic yukawa sectors, the evaluation of decay widths including higherorder qcd corrections, theoretical constraints and. In order to provide accurate and reliable predictions within this model, nexttoleading. Higgs is a goldstone boson of spontaneous symmetry breaking. In this paper we shall study in detail the trilinear higgs couplings in the two higgs doublet model with cp violation. Taking into account all relevant results from direct charged and neutral higgs boson searches at lep and the lhc, as well as the most recent constraints from flavour physics, we present. The program features simple conversion between different parametrizations of the 2hdm potential, a flexible yukawa sector specification with choices of different z 2symmetries or more general couplings, a decay library including all two. The state carry thus an index, from 1 to 3, that labels such a polarization. Search for a lowmass neutral higgs boson with suppressed couplings to fermions using events with multiphoton final states cdf collaboration aaltonen, timo antero et al.
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