Search for exotic leptons in final states with two or three leptons and fat-jets at 13 TeV LHC

Ashanujjaman, Saiyad; Choudhury, Debajyoti; Ghosh, Kirtiman

doi:10.1007/jhep04(2022)150

Cited by 11 publications

(4 citation statements)

References 89 publications

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“…For the triplet case, Ref. [31] estimates the discovery reach of the LHC at 3 ab −1 at 5 σ to be of approximately 1.4 TeV.…”

Section: General Phenomenological Considerationsmentioning

confidence: 99%

A bridge to new physics: proposing new -- and reviving old -- explanations of $a_μ$

Guedes,

Olgoso

2022

Preprint

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The 4.2 σ tension in the combined measurement of the anomalous magnetic moment of the muon, a µ , and the Standard Model prediction strongly suggests the existence of beyond the Standard Model physics. Following the Standard Model Effective Field Theory approach, we study a particular topology, the bridge diagram, which gives a chirally enhanced contribution to a µ . We classify all possible 2-and 3-field SM extensions that can generate this contribution and present the full a µ result for them. Within our approach, we find that several 2-field fermion-scalar extensions which had been previously discarded in the literature -when only the Yukawa-suppressed contribution was considered -can actually be viable models to explain the observed anomaly. Furthermore, the 3-field extensions which generate the bridge diagram represent a new class of models to account for a µ . We explore a particular 3-field extension which, beyond explaining a µ , can also account for the neutral B-meson anomalies and the Cabibbo angle anomaly. We present the full one-loop matching for this model and a one-loop phenomenological study.

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“…For the triplet case, Ref. [31] estimates the discovery reach of the LHC at 3 ab −1 at 5 σ to be of approximately 1.4 TeV.…”

Section: General Phenomenological Considerationsmentioning

confidence: 99%

A bridge to new physics: proposing new -- and reviving old -- explanations of $a_μ$

Guedes,

Olgoso

2022

Preprint

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“…In the appendix we give the lists of all possible models, consistent with these assumptions. It would be interesting to study, whether some of these models can lead to phenomenology at colliders, say the LHC or FCC, that has not already been covered in previous work, see for example [14,37,[55][56][57][58][59][60][61][62][63].…”

Section: Discussionmentioning

confidence: 99%

How many 1-loop neutrino mass models are there?

Arbeláez,

Cepedello,

Helo

et al. 2022

Preprint

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It is well-known that at tree-level the d=5 Weinberg operator can be generated in exactly three different ways, the famous seesaw models. In this paper we study the related question of how many phenomenologically consistent 1-loop models one can construct at d=5. First, we discuss that there are two possible classes of 1-loop neutrino mass models, that allow avoiding stable charged relics: (i) Models with dark matter candidates and (ii) models with "exits". Here, we define "exits" as particles that can decay into standard model fields. Considering 1-loop models with new scalars and fermions, we find in the dark matter class a total of (113+205) models, while in the exit class we find (38+368) models. Here, 113 is the number of DM models, which require a stabilizing symmetry, while 205 is the number of models which contain a dark matter candidate, which maybe accidentally stable. In the exit class the 38 refers to models, for which one (or two) of the internal particles in the loop is a SM field, while the 368 models contain only fields beyond the SM (BSM) in the neutrino mass diagram. We then study the RGE evolution of the gauge couplings in all our 1-loop models. Many of the models in our list lead to Landau poles in some gauge coupling at rather low energies and there is exactly one model which unifies the gauge couplings at energies above 10 15 GeV in a numerically acceptable way.

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Section: Jhep08(2022)023mentioning

confidence: 99%

How many 1-loop neutrino mass models are there?

Arbeláez

Cepedello

Helo

et al. 2022

J. High Energ. Phys.

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It is well-known that at tree-level the d = 5 Weinberg operator can be generated in exactly three different ways, the famous seesaw models. In this paper we study the related question of how many phenomenologically consistent 1-loop models one can construct at d=5. First, we discuss that there are two possible classes of 1-loop neutrino mass models, that allow avoiding stable charged relics: (i) models with dark matter candidates and (ii) models with “exits”. Here, we define “exits” as particles that can decay into standard model fields. Considering 1-loop models with new scalars and fermions, we find in the dark matter class a total of (115+203) models, while in the exit class we find (38+368) models. Here, 115 is the number of DM models, which require a stabilizing symmetry, while 203 is the number of models which contain a dark matter candidate, which maybe accidentally stable. In the exit class the 38 refers to models, for which one (or two) of the internal particles in the loop is a SM field, while the 368 models contain only fields beyond the SM (BSM) in the neutrino mass diagram. We then study the RGE evolution of the gauge couplings in all our 1-loop models. Many of the models in our list lead to Landau poles in some gauge coupling at rather low energies and there is exactly one model which unifies the gauge couplings at energies above 1015 GeV in a numerically acceptable way.

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Search for exotic leptons in final states with two or three leptons and fat-jets at 13 TeV LHC

Cited by 11 publications

References 89 publications

A bridge to new physics: proposing new -- and reviving old -- explanations of $a_μ$

A bridge to new physics: proposing new -- and reviving old -- explanations of $a_μ$

How many 1-loop neutrino mass models are there?

How many 1-loop neutrino mass models are there?

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