Tripling down on the W boson mass

Henning Bahl; Wen Han Chiu; Christina Gao; Lian-Tao Wang; Yi-Ming Zhong

doi:10.1140/epjc/s10052-022-10934-5

2022 Impact factor 4.4

Particles and Fields

Open Access

Eur. Phys. J. C (2022) 82: 944
https://doi.org/10.1140/epjc/s10052-022-10934-5

Regular Article - Theoretical Physics

Tripling down on the W boson mass

Henning Bahl¹^,2^a, Wen Han Chiu¹^,2, Christina Gao³^,4, Lian-Tao Wang¹^,2^,5 and Yi-Ming Zhong⁵

¹ Department of Physics, University of Chicago, 60637, Chicago, IL, USA
² Enrico Fermi Institute, University of Chicago, 60637, Chicago, IL, USA
³ Theoretical Physics Department, Fermi National Accelerator Laboratory, 60510, Batavia, IL, USA
⁴ University of Illinois at Urbana-Champaign, 61801, Urbana, IL, USA
⁵ Kavli Institute for Cosmological Physics, University of Chicago, 60637, Chicago, IL, USA

^a hbahl@uchicago.edu

Received: 27 July 2022
Accepted: 17 October 2022
Published online: 25 October 2022

Abstract

A new precision measurement of the W boson mass has been announced by the CDF collaboration, which strongly deviates from the Standard Model prediction. In this article, we study the implications of this measurement on the parameter space of the triplet extension (with hypercharge ) of the Standard Model Higgs sector, focusing on a limit where the new triplet is approximate -odd while the SM is -even. We study the compatibility of the triplet spectrum preferred by the W boson mass measured by the CDF-II experiment with other electroweak precision observables and Higgs precision data. We comprehensively consider the signals of new Higgs states at the LHC and highlighted the promising search channels. In addition, we also investigate the cosmological implications of the case in which the lightest new Higgs particle is either late decaying or cosmologically stable.

© The Author(s) 2022

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