The Triplet Dirac Seesaw in the View of the Recent CDF-II W Mass Anomaly

Abstract

In the present letter, a Dirac neutrino mass model is presented in the view of the new result on W boson mass of m CDF −II W = 80.4335 ± 0.0094 GeV, recently reported by the CDF-II experimental collaboration. The newly measured value of the W mass anomaly shows a 7-σ deviation from that predicted by the standard model. The model explains the CDF-II W boson mass anomaly by extending the standard model with hypercharge zero vector-like fermion triplet. Symmetry is amended with a global U (1) B−L which is broken with an hypercharge zero electroweak triplet. It is demonstrated that the model can successfully explain CDF-II result, Dirac neutrino mass origin, while satisfying standard model precision constraints and collider constraints with scalar and fermion triplet masses in the ranger 1.4 TeV−5.2 TeV and 100 TeV −10 13 GeV, respectively.

The muon $g-2$ and $W$-mass anomalies explained and the electroweak vacuum stabilised by extending the minimal Type-II seesaw

“…In fact, the announcement of the W -mass has spurred a series of investigations, each invoking some NP scenario, some of the earliest ones being [21][22][23][24][25][26][27]. Further speculations in this direction have included, for instance, supersymmetric models [28][29][30][31][32][33], non-supersymmetric extended Higgs sectors [34][35][36][37][38][39][40][41][42][43][44][45][46][47][48][49][50][51], vector-like fermions [52][53][54][55][56],…”

Muon ($g-2$) and W-boson mass Anomaly in a Model Based on $Z_4$ Symmetry with Vector like Fermion

“…Within SM, the mass of W-boson is M SM W = 80.354 ± 0.007 GeV [16], however, CDF-II collaboration has recently published their results for the mass of W gauge boson M W = 80.4335 ± 0.0094 GeV [17] which shows 7σ discrepancy with corresponding SM prediction [16]. There have been many attempts to resolve this anomaly [18][19][20][21][22][23][24][25][26][27]. The authors in Refs.…”

W-mass anomaly in the simplest linear seesaw mechanism

“…In order to account for this large deviation from the SM W -mass prediction, new physics seems required. An interesting example is provided by neutrino mass generation schemes, which often require new particles that may shift the W-boson mass appreciably at the radiative level [40][41][42][43][44][45][46].…”