• DOI:10.1140/epjc/s10052-021-09919-7
• Corpus ID: 239885332

Large hadron collider constraints on some simple $$Z^\prime $$ models for $$b\rightarrow s \mu ^+\mu ^-$$ anomalies

@article{Allanach2021LargeHC,
  title={Large hadron collider constraints on some simple \$\$Z^\prime \$\$ models for \$\$b\rightarrow s \mu ^+\mu ^-\$\$ anomalies},
  author={Benjamin C. Allanach and J. M. Butterworth and Tyler Corbett},
  journal={The European Physical Journal C},
  year={2021}
}

• B. Allanach, J. Butterworth, T. Corbett
• Published 26 October 2021
• Physics
• The European Physical Journal C

<jats:p>We examine current Large Hadron Collider constraints on some simple <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> models that significantly improve on Standard Model fits to <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 data. The models that we consider are the ‘third family baryon number minus second family lepton number’ (<jats:inline-formula><jats:alternatives><jats:tex-math>$${B_3-L_2}$$</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML">
<mml:mrow>
<mml:msub>
<mml:mi>B</mml:mi>
<mml:mn>3</mml:mn>
</mml:msub>
<mml:mo>-</mml:mo>
<mml:msub>
<mml:mi>L</mml:mi>
<mml:mn>2</mml:mn>
</mml:msub>
</mml:mrow>
</mml:math></jats:alternatives></jats:inline-formula>) model and the ‘third family hypercharge’ model and variants. The constraints are applied on parameter regions of each model that fit 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 data and come from high-mass Drell–Yan di-muons and measurements of Standard Model processes. This latter set of observables place particularly strong bounds upon the parameter space of the <jats:inline-formula><jats:alternatives><jats:tex-math>$${B_3-L_2}$$</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML">
<mml:mrow>
<mml:msub>
<mml:mi>B</mml:mi>
<mml:mn>3</mml:mn>
</mml:msub>
<mml:mo>-</mml:mo>
<mml:msub>
<mml:mi>L</mml:mi>
<mml:mn>2</mml:mn>
</mml:msub>
</mml:mrow>
</mml:math></jats:alternatives></jats:inline-formula> model when the mass of the <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> boson is less than 300 GeV.</jats:p>