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<p>Cosmological collider physics allows the detection of heavy particles at inflationary scales through their imprints on primordial non-Gaussianities. We study the chemical potential mechanism applied to a pair of charged scalars. We analytically evaluate the resulting one-loop contribution to the bispectrum, using the spectral decomposition. In this way we are able to determine the parametric dependencies for both the signal and the background. We show that a signal strength <InlineEquation ID="IEq1"> <EquationSource Format="TEX">\({f}_{\text{NL}}\sim \mathcal{O}(0.01)\)</EquationSource> </InlineEquation> can be obtained within theoretical control, potentially reachable by 21 cm tomography. As an application we consider the colored Higgs bosons in SU(5) supersymmetric orbifold grand unification with masses <i>M</i> ≲ 10<sup>15</sup> GeV.</p>

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Charged loops at the cosmological collider with chemical potential

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年1月13日

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  • Arushi Bodas,
  • Edward Broadberry,
  • Raman Sundrum,
  • Zhaohui Xu

摘要

Cosmological collider physics allows the detection of heavy particles at inflationary scales through their imprints on primordial non-Gaussianities. We study the chemical potential mechanism applied to a pair of charged scalars. We analytically evaluate the resulting one-loop contribution to the bispectrum, using the spectral decomposition. In this way we are able to determine the parametric dependencies for both the signal and the background. We show that a signal strength \({f}_{\text{NL}}\sim \mathcal{O}(0.01)\) can be obtained within theoretical control, potentially reachable by 21 cm tomography. As an application we consider the colored Higgs bosons in SU(5) supersymmetric orbifold grand unification with masses M ≲ 1015 GeV.