Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Oblique Lessons from the $W$ Mass Measurement at CDF II   The CDF collaboration recently reported a new precise measurement of the $W$
boson mass $M_W$ with a central value significantly larger than the SM
prediction. We explore the effects of including this new measurement on a fit
of the Standard Model (SM) to electroweak precision data. We characterize the
tension of this new measurement with the SM and explore potential beyond the SM
phenomena within the electroweak sector in terms of the oblique parameters $S$,
$T$ and $U$. We show that the large $M_W$ value can be accommodated in the fit
by a large, nonzero value of $U$, which is difficult to construct in explicit
models. Assuming $U = 0$, the electroweak fit strongly prefers large, positive
values of $T$. Finally, we study how the preferred values of the oblique
parameters may be generated in the context of models affecting the electroweak
sector at tree- and loop-level. In particular, we demonstrate that the
preferred values of $T$ and $S$ can be generated with a real SU(2)$_L$ triplet
scalar, the humble "swino," which can be heavy enough to evade current collider
constraints, or by (multiple) species of a singlet-doublet fermion pair. We
highlight challenges in constructing other simple models, such as a dark
photon, for explaining a large $M_W$ value, and several directions for further
study.

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The categories of this paper are: dg-ga
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The categories of this paper are: solv-int
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The categories of this paper are: nucl-ex
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The categories of this paper are: alg-geom
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The categories of this paper are: supr-con
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The categories of this paper are: hep-ex
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The categories of this paper are: q-fin
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The categories of this paper are: chem-ph
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The categories of this paper are: math
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The categories of this paper are: eess
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The categories of this paper are: funct-an
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The categories of this paper are: acc-phys
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The categories of this paper are: astro-ph
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The categories of this paper are: nucl-th
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The categories of this paper are: ao-sci
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The categories of this paper are: math-ph