Hide and seek with the third family hypercharge model’s Z<sup>′</sup> at the large hadron collider
Authors
Allanach, BC
Banks, H
Publication Date
2022Journal Title
European Physical Journal C
ISSN
1434-6044
Publisher
Springer Science and Business Media LLC
Volume
82
Issue
3
Language
en
Type
Article
This Version
VoR
Metadata
Show full item recordCitation
Allanach, B., & Banks, H. (2022). Hide and seek with the third family hypercharge model’s Z<sup>′</sup> at the large hadron collider. European Physical Journal C, 82 (3) https://doi.org/10.1140/epjc/s10052-022-10191-6
Abstract
<jats:title>Abstract</jats:title><jats:p>The Third Family Hypercharge Model predicts a <jats:inline-formula><jats:alternatives><jats:tex-math>$$Z^\prime $$</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML">
<mml:msup>
<mml:mi>Z</mml:mi>
<mml:mo>′</mml:mo>
</mml:msup>
</mml:math></jats:alternatives></jats:inline-formula> gauge boson with flavour dependent couplings which has been used to explain anomalies in meson decay processes which involve the <jats:inline-formula><jats:alternatives><jats:tex-math>$$b\rightarrow s\mu ^+\mu ^-$$</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML">
<mml:mrow>
<mml:mi>b</mml:mi>
<mml:mo>→</mml:mo>
<mml:mi>s</mml:mi>
<mml:msup>
<mml:mi>μ</mml:mi>
<mml:mo>+</mml:mo>
</mml:msup>
<mml:msup>
<mml:mi>μ</mml:mi>
<mml:mo>-</mml:mo>
</mml:msup>
</mml:mrow>
</mml:math></jats:alternatives></jats:inline-formula> transition. The model predicts that a TeV-scale <jats:inline-formula><jats:alternatives><jats:tex-math>$$Z^\prime $$</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML">
<mml:msup>
<mml:mi>Z</mml:mi>
<mml:mo>′</mml:mo>
</mml:msup>
</mml:math></jats:alternatives></jats:inline-formula> should decay to particle-antiparticle pairs of muons, taus, top quarks and bottom quarks with appreciable branching ratios. We reinterpret various ATLAS and CMS search limits for <jats:inline-formula><jats:alternatives><jats:tex-math>$$Z^\prime $$</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML">
<mml:msup>
<mml:mi>Z</mml:mi>
<mml:mo>′</mml:mo>
</mml:msup>
</mml:math></jats:alternatives></jats:inline-formula> production followed by such decays at the LHC over a parameter space of the model that results from a successful combined fit to the <jats:inline-formula><jats:alternatives><jats:tex-math>$$b\rightarrow s l^+ l^-$$</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML">
<mml:mrow>
<mml:mi>b</mml:mi>
<mml:mo>→</mml:mo>
<mml:mi>s</mml:mi>
<mml:msup>
<mml:mi>l</mml:mi>
<mml:mo>+</mml:mo>
</mml:msup>
<mml:msup>
<mml:mi>l</mml:mi>
<mml:mo>-</mml:mo>
</mml:msup>
</mml:mrow>
</mml:math></jats:alternatives></jats:inline-formula> data and precision electroweak observables. Current exclusions in parameter space and expected sensitivities of the various different channels in the high-luminosity run are compared. We find that the high-luminosity run of the LHC will significantly increase the sensitivity to the model beyond the existing empirical limits, which we find to be surprisingly weak.</jats:p>
Keywords
Regular Article - Theoretical Physics
Sponsorship
Science and Technology Facilities Council (ST/P000681/1)
STFC (ST/T000694/1)
Identifiers
s10052-022-10191-6, 10191
External DOI: https://doi.org/10.1140/epjc/s10052-022-10191-6
This record's URL: https://www.repository.cam.ac.uk/handle/1810/335675
Rights
Licence:
http://creativecommons.org/licenses/by/4.0/
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