<p>We study the physics potential of heavy QCD axions at high-energy muon colliders. Unlike typical axion-like particles, heavy QCD axions solve the strong CP problem with phenomenology driven by the anomalous gluon <InlineEquation ID="IEq1"> <EquationSource Format="MATHML"><math display="inline"> <mfenced close=")" open="("> <mrow> <mi mathvariant="italic">aG</mi> <mover accent="true"> <mi>G</mi> <mo stretchy="true">~</mo> </mover> </mrow> </mfenced> </math></EquationSource> <EquationSource Format="TEX">\( \left( aG\overset{\sim }{G}\right) \)</EquationSource> </InlineEquation> couplings. Several ultraviolet scenarios are presented in which QCD axions with TeV-scale masses and decay constants arise consistently with a solution to both the strong CP problem and the axion quality problem. We perform a detailed collider analysis for both a 3 and 10 TeV muon collider, focusing on hadronic axion decays that gives rise to a dijet-resonance signature. Our projections for the axion discovery reach in the multi-TeV mass range demonstrate that a muon collider can significantly extend sensitivity to heavy QCD axions compared to existing experiments.</p>

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Heavy QCD axions at high-energy muon colliders

  • Ravneet Bedi,
  • Tony Gherghetta,
  • Soubhik Kumar,
  • Peiran Li,
  • Zhen Liu

摘要

We study the physics potential of heavy QCD axions at high-energy muon colliders. Unlike typical axion-like particles, heavy QCD axions solve the strong CP problem with phenomenology driven by the anomalous gluon aG G ~ \( \left( aG\overset{\sim }{G}\right) \) couplings. Several ultraviolet scenarios are presented in which QCD axions with TeV-scale masses and decay constants arise consistently with a solution to both the strong CP problem and the axion quality problem. We perform a detailed collider analysis for both a 3 and 10 TeV muon collider, focusing on hadronic axion decays that gives rise to a dijet-resonance signature. Our projections for the axion discovery reach in the multi-TeV mass range demonstrate that a muon collider can significantly extend sensitivity to heavy QCD axions compared to existing experiments.