Composite dark matter phenomenology in the presence of lighter degrees of freedom

Ramos, Milagros

doi:10.1007/jhep07(2020)128

Cited by 20 publications

(21 citation statements)

References 85 publications

(120 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…(Something similar happens also in other CHMs, e.g. in SO(7)/SO (6) with q L ∼ 27 and t R ∼ 1 [8] as well as in SO(7)/G 2 with q L ∼ 35, t R ∼ 1 [10]. )…”

supporting

confidence: 69%

“…We also highlight again in this section that they can be much more predictive than other models. SO(2)/SO(4) [4], SO(7)/SO (6) [5][6][7][8], SO(7)/G 2 [9,10], SO(6)/SO(4) [11,12], SO (7)/SO (5) [12] among others. (Note that we do not write explicitly the unbroken SU(3) group of colour.)…”

mentioning

confidence: 99%

“…(The prominent exception is the study of Ref. [8], that we discuss later on this section.) The phenomenology of all these cases can be therefore conveniently captured by the following Lagrangian [12]:…”

mentioning

confidence: 99%

See 2 more Smart Citations

Review on Goldstone dark matter

Chala

2021

Eur. Phys. J. Spec. Top.

View full text Add to dashboard Cite

We review the theory and phenomenology of models in which the dark matter is made of composite pseudo-Nambu Goldstone bosons. We focus predominantly on models in which the Higgs is also composite and dark matter is a singlet and heavier than the Standard Model fields. Then we discuss a variety of departures from this main setup, including: electroweak charged dark matter, lighter dark matter, issues related to quantum anomalies, ultraviolet completions or composite dark matter not related to the hierarchy problem.

show abstract

“…(Something similar happens also in other CHMs, e.g. in SO(7)/SO (6) with q L ∼ 27 and t R ∼ 1 [8] as well as in SO(7)/G 2 with q L ∼ 35, t R ∼ 1 [10]. )…”

supporting

confidence: 69%

mentioning

confidence: 99%

See 1 more Smart Citation

Review on Goldstone dark matter

Chala

2021

Eur. Phys. J. Spec. Top.

View full text Add to dashboard Cite

show abstract

“…After the initial selections the dominant background is tt production with one top quark decaying leptonically and the other one decaying hadronically. This background is strongly reduced by demanding E miss T > 550 GeV and requiring a lower limit of 180 GeV on the transverse mass of the charged lepton defined as 80,60,30,25) GeV , |η( j)| < 2.5…”

Section: T Final Statesmentioning

confidence: 99%

Searching for production of dark matter in association with top quarks at the LHC

Haisch

Polesello

2019

J. High Energ. Phys.

View full text Add to dashboard Cite

In the framework of spin-0 s-channel dark matter (DM) simplified models, we reassess the sensitivity of future LHC runs to the production of DM in association with top quarks. We consider two different missing transverse energy (E miss T ) signatures, namely production of DM in association with either a tt pair or a top quark and a W boson, where the latter channel has not been the focus of a dedicated analysis prior to this work. Final states with two leptons are studied and a realistic analysis strategy is developed that simultaneously takes into account both channels. Compared to other existing search strategies the proposed combination of tt + E miss T and tW + E miss T production provides a significantly improved coverage of the parameter space of spin-0 s-channel DM simplified models. reach of tt + E miss T analyses (see very recently also [12,13]). The work [14] has then shown that a dedicated search for t-channel t j + E miss T production can provide an interesting stand-alone DM signal at the LHC. Both of these studies have been performed in the context of spin-0 s-channel DM simplified models. The article [15] has finally studied single-top plus E miss T production in an ultraviolet (UV) complete model with two Higgs doublets (2HDM) and an extra pseudoscalar mediator, known as the 2HDM+a model [16][17][18][19][20][21]. In the framework of the 2HDM+a model it has been shown that tW + E miss T is the most interesting channel because it can be resonantly procedure via the exchange of a charged Higgs boson. A dedicated analysis of the tW + E miss T final state in spin-0 s-channel DM simplified models has instead not been performed so far. The main goal of this work is to close this gap by developing an analysis which provides an improved coverage of the parameter space of spin-0 s-channel DM simplified models via a combined two-lepton search for tt + E miss T and tW + E miss T production. The outline of this article is as follows. In Section 2 we describe the structure of the DM simplified models that we consider. Section 3 contains a discussion of unitarity violation in DM plus top-quark production. From this discussion one can conclude that calculations of the tW+E miss T signature in the context of spin-0 s-channel DM simplified models lead to meaningful results at LHC energies. The angular correlations of the tW + E miss T signal are discussed in Section 4, while a brief description of our Monte Carlo (MC) and detector simulations is presented in Section 5. Our actual analysis strategy can be found in Section 6. It spells out all selection criteria and illustrates their impact on the DM signals and the SM background. In Section 7, we present the numerical results of our analysis, providing a detailed evaluation of the achievable sensitivity of tt + E miss T and tW + E miss T production at future LHC runs. Constraints on the parameter space of the spin-0 s-channel DM simplified models are also derived in this section. We conclude in Section 8.

show abstract

“…These include, among others, the NMSSM [1] in which an extra supersinglet reduces the µ-problem; as well as a big part of the composite Higgs models (CHM) developed to the date [2][3][4][5][6][7][8][9][10][11][12][13][14][15]. Moreover, pseudoscalar singlets have been showed to be excellent candidates to accommodate EW baryogenesis with two step phase transitions at which CP is spontaneously broken [10,[15][16][17][18][19][20][21]. Also, they have been proved to explain the g − 2 anomaly of the muon [22].…”

Section: Introductionmentioning

confidence: 99%