TY  - JOUR
AU  - Bagnaschi, E.
AU  - Ellis, J.
AU  - Madigan, M.
AU  - Mimasu, K.
AU  - Sanz, V.
AU  - You, T.
PY  - 2022
DA  - 2022//
TI  - SMEFT analysis of m(W)
T2  - J. High Energy Phys.
JO  - Journal of High Energy Physics
SP  - 308 - 22pp
VL  - 08
IS  - 8
PB  - Springer
KW  - Electroweak Precision Physics
KW  - SMEFT
AB  - We use the Fitmaker tool to incorporate the recent CDF measurement of mW in a global fit to electroweak, Higgs, and diboson data in the Standard Model Effective Field Theory (SMEFT) including dimension-6 operators at linear order. We find that including any one of the SMEFT operators O-HWB, O-HD, O (l) (l) or O ((3)) (H l) with a non-zero coefficient could provide a better fit than the Standard Model, with the strongest pull for O-HD and no tension with other electroweak precision data. We then analyse which tree-level single-field extensions of the Standard Model could generate such operator coefficients with the appropriate sign, and discuss the masses and couplings of these fields that best fit the CDF measurement and other data. In particular, the global fit favours either a singlet Z 0 vector boson, a scalar electroweak triplet with zero hypercharge, or a vector electroweak triplet with unit hypercharge, followed by a singlet heavy neutral lepton, all with masses in the multi-TeV range for unit coupling.
SN  - 1029-8479
UR  - https://arxiv.org/abs/2204.05260
UR  - https://doi.org/10.1007/JHEP08(2022)308
DO  - 10.1007/JHEP08(2022)308
LA  - English
N1  - WOS:000848742400003
ID  - Bagnaschi_etal2022
ER  -