$W$-mass and 96 GeV excess in type-III 2HDM

Benbrik, Rachid; Boukidi, Mohammed; Manaut, B.

doi:10.48550/arxiv.2204.11755

Cited by 9 publications

(11 citation statements)

References 44 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For v ∆ = 4.82 GeV, the dominant decay mode is two W's final states as shown in Eq. (18). Therefore, the decay branching ratio is 100%.…”

Section: Production and Detection For Doubly Charged Higgs In The Lep...mentioning

confidence: 96%

“…This is a significant indication of new physics beyond the SM (BSM). A lot of efforts have been made to provide an explanation for this tantalizing excess, such as singlet scalar model [3][4][5][6], Two-Higgs Doublet model [7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25], triplet scalar model [26][27][28][29][30][31][32][33][34][35][36][37][38][39], new fermion [40][41][42][43][44][45][46][47][48][49][50][51], new gauge boson [52]…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Electroweak precision tests for triplet scalars

Yu¹,

He²,

Huang³

et al. 2022

Preprint

View full text Add to dashboard Cite

Electroweak precision observables are fundamentally important for testing the standard model (SM) or its extensions. The influences to observables from new physics within the electroweak sector can be expressed in terms of oblique parameters S, T, U. The recently reported W mass excess anomaly by CDF modifies these parameters in a significant way. By performing the global fit with the CDF new W mass measurement data, we obtain S = 0.03 ± 0.03, T = 0.06 ± 0.02 and U = 0.16 ± 0.03 (or S = 0.14 ± 0.03, T = 0.24 ± 0.02 with U = 0) which is significantly away from zero as SM would predict. The CDF excess strongly indicates the need of new physics beyond SM. We carry out a global fit to study the influence of two different cases of simple extensions by a hyper-charge Y = 1 triplet scalar ∆ (corresponding to the type-II seesaw model) and a Y = 0 real triplet scalar Σ on electroweak precision tests to determine parameter space in these models to solve the W mass anomaly and discuss the implications. We find that these triplets can affect the oblique parameters significantly at the tree and loop levels. For Y = 1 case, there are seven new scalars in the model. The tree and scalar loop effects on oblique parameters can be expressed in terms of three parameters, the neutral CP-even mass mH , potential parameter λ4 and triplet vev v∆. Our global fit obtains mH = 296.02 ± 10.18 GeV, λ4 = 2.58 ± 0.09 and v∆ = 4.82 ± 0.34 GeV. These parameter correspondingly results in mass difference ∆m 2 = (197.49 ± 3.45GeV) 2 . Using these fit values, we further obtain m H ++ = 98.09 ± 20.02GeV, which satisfies the current LHC constraints. We also further adopt the phenomenological analysis, such as vacuum stability and perturbative unitarity, Higgs data and triple Higgs self-coupling. Furthermore, we find that the future lepton colliders can feasibly search for doubly charged H ++ via pair production H ++ H −− and decay channel to four W final states. For Y = 0 case, there are four new scalars in the model. The tree and new scalar effects on the oblique parameters can be parameterized by the singly charged mass m H + , the mass difference ∆m = m H + − m H 0 and triplet vev vΣ. Our global fit obtains m H + = 77.16 ± 17.12 GeV, ∆m = −14.27 ± 4.22 GeV and vΣ = 3.20 ± 0.30 GeV. However, these strongly violate the perturbative unitarity of the potential parameter b4, which can only be satisfied within 3σ errors.

show abstract

“…For v ∆ = 4.82 GeV, the dominant decay mode is two W's final states as shown in Eq. (18). Therefore, the decay branching ratio is 100%.…”

Section: Production and Detection For Doubly Charged Higgs In The Lep...mentioning

confidence: 96%

Section: Introductionmentioning

confidence: 99%

Electroweak precision tests for triplet scalars

Yu¹,

He²,

Huang³

et al. 2022

Preprint

View full text Add to dashboard Cite

show abstract

“…We construct a principle variable to describe the impact of different PDFs on the shape of the M T distribution. That is the mean value of M T within a select window of [70,90] GeV, denoted as M T . We choose this window in accordance with the CDF analysis, also because kinematic bins in this range show the largest significance when varying M W .…”

Section: A the Cdf Measurementmentioning

confidence: 99%

Understanding PDF uncertainty on the $W$ boson mass measurements in CT18 global analysis

Gao¹,

Liu²,

Xie³

2022

Preprint

View full text Add to dashboard Cite

We study the dependence of the transverse mass distribution of the charged lepton and the missing energies on the parton distributions (PDFs) adapted to the W boson mass measurements at the CDF and ATLAS experiments. We compare the shape variations of the distribution induced by different PDFs and find that spread of predictions from different PDF sets can be much larger than the PDF uncertainty predicted by a specific PDF set. We suggest analyzing the experimental data using up-to-date PDFs for a better understanding of the PDF uncertainties in the W boson mass measurements. We further carry out a series of Lagrange multiplier scans to identify the constraints on the transverse mass distribution imposed by individual data sets in the CT18 global analysis. In the case of CDF measurement, the distribution is mostly sensitive to the d-quark PDFs at the intermediate x region that is largely constrained by the DIS and Drell-Yan data on the deuteron target, as well as the Tevatron lepton charge asymmetry data.

show abstract

“…A variety of new physics interpretations have been discussed in Refs. [17][18][19][20][21][22][23][24][25][26][27][28][29][30][31][32].…”

Section: Introductionmentioning

confidence: 99%

Scrutinizing the 95-100 GeV di-tau excess in the top associated process

Iguro¹,

Kitahara²,

Omura³

2022

Preprint

View full text Add to dashboard Cite

Recently, the CMS collaboration has reported a di-tau excess with a local significance of 2.6-3.1σ where the invariant mass is m τ τ = 95-100 GeV. This excess can be interpreted as a light scalar boson that couples to the third generation fermions, particularly top and τ . Based on the simplest model that can account for the CMS di-tau excess, we evaluate experimental sensitivities to the additional light resonance, using the results reported by the ATLAS collaboration. We see that a search for the top-quark associated production of the SM Higgs boson that decays into τ τ sets a strong model-independent limit. We also find that the CP-even scalar interpretation of the light resonance is excluded by the ATLAS results, while the CP-odd interpretation is not.

show abstract

$W$-mass and 96 GeV excess in type-III 2HDM

Cited by 9 publications

References 44 publications

Electroweak precision tests for triplet scalars

Electroweak precision tests for triplet scalars

Understanding PDF uncertainty on the $W$ boson mass measurements in CT18 global analysis

Scrutinizing the 95-100 GeV di-tau excess in the top associated process

Contact Info

Product

Resources

About