A cosmological Higgs collider

A bstract The quantum fluctuations of the Higgs field during inflation could be a source of primordial density perturbations through Higgs-dependent inflaton decay. By measuring primordial non-Gaussianities, this so-called Higgs-modulated reheating scenario provides us a unique chance to probe Higgs...

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Bibliographic Details
Published in:The journal of high energy physics 2020-02, Vol.2020 (2), p.1-33, Article 11
Main Authors: Lu, Shiyun, Wang, Yi, Xianyu, Zhong-Zhi
Format: Article
Language:English
Subjects:
Astronomical models
Classical and Quantum Gravitation
Cosmology
Cosmology of Theories beyond the SM
Decay
Elementary Particles
Heating
Higgs Physics
High energy physics
Physics
Physics and Astronomy
Quantum Field Theories
Quantum Field Theory
Quantum phenomena
Quantum Physics
Regular Article - Theoretical Physics
Relativity Theory
Scalars
Standard model (particle physics)
String Theory
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Summary:A bstract The quantum fluctuations of the Higgs field during inflation could be a source of primordial density perturbations through Higgs-dependent inflaton decay. By measuring primordial non-Gaussianities, this so-called Higgs-modulated reheating scenario provides us a unique chance to probe Higgs interactions at extremely high energy scale, which we call the Cosmological Higgs Collider (CHC). We realize CHC in a simple scenario where the inflaton decays into Higgs-portal scalars, taking account of the decay of the Higgs fluctuation amplitude after inflation. We also calculate the CHC signals of Standard Model particles, namely their imprints in the squeezed bispectrum, which can be naturally large. The concept of CHC can be straightforwardly generalized to cosmological isocurvature colliders with other types of isocurvature perturbations.
ISSN:1029-8479
1029-8479
DOI:10.1007/JHEP02(2020)011