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<p>Exotic neutral gauge bosons are powerful candidates for new physics beyond the Standard Model. The Left-Right Symmetric Model is a well-motivated framework that addresses several open questions in particle physics, including neutrino masses, dark matter, and the matter-antimatter asymmetry. It predicts new gauge bosons, such as <i>Z</i><sup>′</sup> and <i>W</i> <sup>′±</sup>, along with additional right-handed particles. We investigate the processes <i>μ</i><sup>+</sup><i>μ</i><sup>−</sup> → <InlineEquation ID="IEq1"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="13130_2025_27066_Article_IEq1.gif" Format="GIF" Height="15" Rendition="HTML" Resolution="72" Type="Linedraw" Width="20" /> </InlineMediaObject> <EquationSource Format="MATHML"><math display="inline"> <mi>q</mi> <mover accent="true"> <mi>q</mi> <mo stretchy="true">¯</mo> </mover> </math></EquationSource> <EquationSource Format="TEX">\( q\overline{q} \)</EquationSource> </InlineEquation> and <i>μ</i><sup>+</sup><i>μ</i><sup>−</sup> → <i>l</i><sup>+</sup><i>l</i><sup>−</sup> with the <i>Z</i><sup>′</sup> boson appearing as an intermediate state. The coupling strength, decay width and mass are the key parameters that govern the production and decay of the <i>Z</i><sup>′</sup> boson. The results indicate that the angular distributions of final-state particles are sensitive to the couplings of <i>Z</i><sup>′</sup> to the other fermions. The forward-backward asymmetry, derived from angular distributions, serves as a sensitive observable for distinguishing Standard Model predictions from those involving <i>Z</i><sup>′</sup> exchange. It also provides a powerful probe of the <i>Z</i><sup>′</sup> couplings to fermions. Compared with the current results at the Large Hadron Collider (LHC), the future muon collider has great potential to explore new parameter space with the <i>Z</i><sup>′</sup> boson.</p>

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Phenomenological study of heavy neutral gauge bosons in the left-right symmetric model at future muon collider

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年8月26日

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  • Zongyang Lu,
  • Jianing Qin,
  • Honglei Li,
  • Zhi-Long Han,
  • Fei Huang,
  • Chun-Yuan Li,
  • Xing-Hua Yang,
  • Zhong-Juan Yang

摘要

Exotic neutral gauge bosons are powerful candidates for new physics beyond the Standard Model. The Left-Right Symmetric Model is a well-motivated framework that addresses several open questions in particle physics, including neutrino masses, dark matter, and the matter-antimatter asymmetry. It predicts new gauge bosons, such as Z′ and W ′±, along with additional right-handed particles. We investigate the processes μ+μ− → q q ¯ \( q\overline{q} \) and μ+μ− → l+l− with the Z′ boson appearing as an intermediate state. The coupling strength, decay width and mass are the key parameters that govern the production and decay of the Z′ boson. The results indicate that the angular distributions of final-state particles are sensitive to the couplings of Z′ to the other fermions. The forward-backward asymmetry, derived from angular distributions, serves as a sensitive observable for distinguishing Standard Model predictions from those involving Z′ exchange. It also provides a powerful probe of the Z′ couplings to fermions. Compared with the current results at the Large Hadron Collider (LHC), the future muon collider has great potential to explore new parameter space with the Z′ boson.