Leptonic g − 2 anomaly in an extended Higgs sector with vector-like leptons

Bharadwaj, Hrishabh; Dutta, S.; Goyal, Ashok

doi:10.1007/jhep11(2021)056

Cited by 19 publications

(4 citation statements)

References 63 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Such models require at least two new physics fields, in order to have the large chirality flip possible on the internal line. Examples of models of this type include: muophilic dark matter running in the loop [255][256][257][258][259][260][261][262][263], contributions from ALPs coupling to heavy vectorlike leptons [264], anomalous Z [265,266], singlet scalars [265,266], low energy supersymmetry [267][268][269][270][271][272], extended Higgs sectors [273][274][275][276], radiative models for charged fermion or neutrino masses [166,[277][278][279]. There may also be a relation with B anomalies [280][281][282][283][284][285], while implications for Higgs physics were discussed in [134,[286][287][288][289][290].…”

Section: Anomalous Magnetic Moment Of the Muonmentioning

confidence: 99%

Snowmass White Paper: Flavor Model Building

Altmannshofer¹,

Zupan²

2022

Preprint

View full text Add to dashboard Cite

In this white paper for the Snowmass process, we summarize the role flavor model building plays in the quest for new physics. We review approaches to address the non-generic flavor structure of the Standard Model and discuss how new physics models can be made compatible with the stringent constraints from flavor changing processes that indirectly probe very high scales. We also give an overview of the persistent anomalies in B decays and the anomalous magnetic moment of the muon and some of their most popular new physics explanations.

show abstract

Section: Anomalous Magnetic Moment Of the Muonmentioning

confidence: 99%

Snowmass White Paper: Flavor Model Building

Altmannshofer¹,

Zupan²

2022

Preprint

View full text Add to dashboard Cite

show abstract

“…The specific model considered, the so-called I-g FC 2HDM is a 2HDM without tree level scalar flavor changing neutral couplings (SFCNC): in the quark sector it is a type I 2HDM while in the lepton sector it is a general flavor conserving model. The existence of these two anomalies has been addressed in a variety of scenarios, including models with extra Higgs doublets [21][22][23][24][25][26][27][28][29][30][31][32][33][34][35][36][37][38], models with other scalar extensions [39][40][41][42][43][44][45][46][47][48] and supersymmetric models [49][50][51][52][53]. There are also plenty of studies with other approaches such as leptoquarks, vector-like fermions or extra gauge bosons, among others [54][55][56][57][58][59][60][61][62][63][64][65]…”

Section: Introductionmentioning

confidence: 99%

Muon and electron $g-2$ anomalies in a flavor conserving 2HDM with an oblique view on the CDF $M_W$ value

Botella¹,

Cornet-Gomez²,

Miró³

et al. 2022

Preprint

View full text Add to dashboard Cite

We consider a type I or type X two Higgs doublets model with a modified lepton sector. The generalized lepton sector is also flavor conserving but with the new Yukawa couplings completely decoupled from lepton mass proportionality. The model is one loop stable under renormalization group evolution and it allows to reproduce the g − 2 muon anomaly together with the different scenarios one can consider for the electron g − 2 anomaly, related to the Cesium and/or to the Rubidium recoil measurements of the fine structure constant. Thorough parameter space analyses are performed to constrain all the model parameters in the different scenarios, either including or not including the recent CDF measurement of the W boson mass. For light new scalars with masses in the 0.2-1.0 TeV range, the muon anomaly receives dominant one loop contributions; it is for heavy new scalars with masses above 1.2 TeV that two loop Barr-Zee diagrams are needed. The electron g − 2 anomaly, if any, must always be obtained with the two loop contributions. The final allowed regions are quite sensitive to the assumptions about perturbativity of Yukawa couplings, which influence unexpected observables like the allowed scalar mass ranges. On that respect, intermediate scalar masses, highly constrained by direct LHC searches, are allowed provided that the new lepton Yukawa couplings are fully scrutinized, including values up to 250 GeV. In the framework of a complete model, fully numerically analysed, we show the implications of the recent M W measurement.

show abstract

“…The gauge boson self-energy diagrams exchanging the vector-like leptons in the loop can give additional contributions to the oblique parameters (S, T, U ), and explain the CDF W -mass. The interactions between the vector-like leptons and muon mediated by the X I (X R ) can enhance the muon g − 2 [73][74][75][76][77][78][79][80][81][82][83]. These new particles can affect the DM relic density via the DM pair-annihilation and various co-annihilations processes.…”

Section: Introductionmentioning

confidence: 99%

The CDF W-mass, muon g-2, and dark matter in a $U(1)_{L_μ-L_τ}$ model with vector-like leptons

Zhou¹,

Han²

2022

Preprint

View full text Add to dashboard Cite

We study the CDF W -mass, muon g − 2, and dark matter observables in a local U (1) Lµ−Lτ model in which the new particles include three vector-like leptons (E 1 , E 2 , N ), a new gauge boson Z , a scalar S (breaking U (1) Lµ−Lτ ), a scalar dark matter X I and its partner X R . We find thatof left (right)-handed fields of vector-like leptons. A large mass splitting between E 1 and E 2 is favored when the differences between s L and s R becomes small. The muon g − 2 anomaly can be simultaneously explained for appropriate difference between s L (m E 1 ) and s R (m E 2 ), and some regions are excluded by the diphoton signal data of the 125 GeV Higgs. Combined with the CDF W -mass, muon g − 2 anomaly and other relevant constraints, the correct dark matter relic density is mainly obtained in two different scenarios: (i) X I X I → Z Z , SS for m Z (m S ) < m X I and (ii) the co-annihilation processes for min(m E 1 , m E 2 , m N , m X R ) closed to m X I . Finally, we use the direct searches for 2 + E miss T event at the LHC to constrain the model, and show the allowed mass ranges of the vector-like leptons and dark matter.

show abstract

Leptonic g − 2 anomaly in an extended Higgs sector with vector-like leptons

Cited by 19 publications

References 63 publications

Snowmass White Paper: Flavor Model Building

Snowmass White Paper: Flavor Model Building

Muon and electron $g-2$ anomalies in a flavor conserving 2HDM with an oblique view on the CDF $M_W$ value

The CDF W-mass, muon g-2, and dark matter in a $U(1)_{L_μ-L_τ}$ model with vector-like leptons

Contact Info

Product

Resources

About