Extra W-boson mass from a D3-brane

Motivated by the recent CDF measurement of the W-boson mass, we study string-based particle physics models which can accommodate this deviation from the Standard Model. We consider an F-theory GUT in which the visible sector is realized on intersecting 7-branes, and extra sector states arise from a probe D3-brane near an E-type Yukawa point. The D3-brane worldvolume naturally realizes a strongly coupled sector which mixes with the Higgs. In the limit where some extra sector states get their mass solely from Higgs vevs, this leads to a contribution to the rho parameter which is too large, but as the D3-brane is separated from the 7-brane stack, this effect is suppressed, leading to O(1) -O(10) TeV scale extra sector states and a correction to rho which would be in accord with the CDF result. We also estimate the contribution to the oblique electroweak parameter S, and find that it is compatible with existing constraints. This also leads to additional signatures, including diphoton resonances (as well as other diboson final states) in the O(1) -O(10) TeV range. (C) 2022 The Author(s). Published by Elsevier B.V.

Automated summary

Motivated by the measurement of the W-boson mass, this study investigates string-based particle physics models that can explain the deviation from the Standard Model. By considering an F-theory GUT and utilizing a D3-brane, it is found that a correction consistent with experimental results can be obtained.