On the implications of positive W mass shift - INSPIRE

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On the implications of positive W mass shift

Apr 12, 2022

18 pages

Published in:

JHEP 05 (2022) 133

Published: May 20, 2022

e-Print:

2204.05992 [hep-ph]

DOI:

10.1007/JHEP05(2022)133

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Abstract: (Springer)

We investigate the phenomenological implications of the recent W mass measurement by the CDF collaboration, which exhibits tension with the standard model (SM) electroweak fit. Performing the fit to the electroweak observables within the SM effective field theory, we find that the new physics that contributes either to the determination of the electroweak vacuum expectation value, or to the oblique parameters, can improve the agreement with data. The best description is obtained from a fit where flavor universality is not required in the new physics operators, with 2 to 3 σ indications for several nonzero Wilson coefficients. We point out that top partners with order TeV masses could lead to the observed shift in the W mass.

Note:

18 pages, 4 figures, 1 Table, version matching the published one

Electroweak Precision Physics
SMEFT
Vector-Like Fermions
CDF
W: mass
effective field theory
operator: higher-dimensional
muon: decay
quark: vector particle
electroweak interaction: precision measurement

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