Electroweak precision fit and new physics in light of the W boson mass
Abstract
The W boson mass is one of the most important electroweak precision observables for testing the Standard Model (SM) or its extensions. The very recent measured W boson mass at the Collider Detector at Fermilab (CDF) shows about 7 σ deviations from the SM prediction, which may challenge the internal consistency of the SM. By performing the global electroweak fit with the new W boson, we present the new values of the oblique parameters: S =0.06 ±0.10 , T =0.11 ±0.12 , U =0.13 ±0.09 , or S =0.14 ±0.08 , T =0.26 ±0.06 with U =0 and the corresponding correlation matrices, which strongly indicates the need for the nondegenerate multiplets beyond the SM. As a proof-of-concept, we show that the new results can be accommodated in the two-Higgs doublet model, where the charged Higgs boson has to be either heavier or lighter than both two heavy neutral Higgs bosons. The collider search for these non-SM Higgs bosons will provide a complementary way to test the new physics for W boson mass anomaly.
- Publication:
-
Physical Review D
- Pub Date:
- August 2022
- DOI:
- 10.1103/PhysRevD.106.035034
- arXiv:
- arXiv:2204.03796
- Bibcode:
- 2022PhRvD.106c5034L
- Keywords:
-
- High Energy Physics - Phenomenology;
- High Energy Physics - Experiment
- E-Print:
- two columns, 10 pages, 8 figures