Real-time dynamics of axion particle production due to spontaneous decay of a coherent axion field

Huang, Xu-Guang; Kharzeev, Dmitri E.; Taya, Hidetoshi

doi:10.1103/physrevd.101.016011

Cited by 6 publications

(4 citation statements)

References 62 publications

(105 reference statements)

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“…Inclusion of this lifetime can also be done by taking into account possible imaginary parts in the Hamiltonian, which could arise from quantum loop effects, or alternatively along the line of Ref. [84] in which the decay of an oscillatory axion-condensed vacuum is studied.…”

Section: Summary and Discussionmentioning

confidence: 99%

Dynamic scale anomalous transport in QCD with electromagnetic background

Kawaguchi,

Matsuzaki,

Huang

2020

Preprint

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We discuss phenomenological implications of the anomalous transport induced by the scale anomaly in QCD coupled to an electromagnatic (EM) field, based on a dilaton effective theory. The scale anomalous current emerges in a way perfectly analogous to the conformal transport current induced in a curved spacetime background, or the Nernst current in Dirac and Weyl semimetals -both current forms are equivalent by a "Weyl transformation". We focus on a spatially homogeneous system of QCD hadron phase, which is expected to be created after the QCD phase transition and thermalization. We find that the EM field can induce a dynamic oscillatory dilaton field which in turn induces the scale anomalous current. As the phenomenological applications, we evaluate the dilepton and diphoton productions induced from the dynamic scale anomalous current, and find that those productions include a characteristic peak structure related to the dynamic oscillatory dialton, which could be tested in heavy ion collisions. We also briefly discuss the out-of-equilibrium particle production created by a nonadiabatic dilaton oscillation, which happens in a way of the so-called tachyonic preheating mechanism.

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Section: Summary and Discussionmentioning

confidence: 99%

Dynamic scale anomalous transport in QCD with electromagnetic background

Kawaguchi,

Matsuzaki,

Huang

2020

Preprint

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“…Another proposal comes from axion physics where the cosmological excess of baryons over antibaryons is generated from the rotation of the QCD axion [58]. The complex relationships between elementary particles, which have played a key role at the origin of the universe [59][60][61][62][63][64][65][66][67][68][69][70][71][72][73][74][75] and the relative experimental difficulties, make a clear picture of the fine-tuned primordial mechanisms far away. However, we can say that a unified framework of the micro CPT issue (decoherence, dissipation and axion rotation) must be revealed at a cosmological level in a de Sitter model where the big bang turns out to be geometrically a bifurcation point.…”

Section: Perspectives: Micro and Macro Cptmentioning

confidence: 99%

CPT Symmetry in Two-Fold de Sitter Universe

Fiscaletti

Licata²,

Tamburini

2021

Symmetry

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The problem of baryon asymmetry unifies cosmology and particle physics at the hearth of theoretical physics. In this work, we consider the point of view of archaic cosmology based on the de Sitter hypersphere as topology of quantum vacuum. We show CPT symmetry derives from the nucleation of particles that divides the hypersphere in two mirror universes and defines big bang as a bifurcation point, as the creation of a de Sitter universe or a pair of entangled universes from “nothing”. Then, we direct our attention to the behavior of neutrinos in a CPT universe and discuss the differences between Majorana and Dirac neutrinos in the observational imprints of the entangled universes.

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“…Inclusion of this lifetime can also be done by taking into account possible imaginary parts in the Hamiltonian, which could arise from quantum loop effects, or alternatively along the line of ref. [87] in which the decay of an oscillatory axion-condensed vacuum is studied.…”

Section: Jhep10(2020)017mentioning

confidence: 99%

Dynamic scale anomalous transport in QCD with electromagnetic background

Kawaguchi

Matsuzaki

Huang

2020

J. High Energ. Phys.

Self Cite

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We discuss phenomenological implications of the anomalous transport induced by the scale anomaly in QCD coupled to an electromagnetic (EM) field, based on a dilaton effective theory. The scale anomalous current emerges in a way perfectly analogous to the conformal transport current induced in a curved spacetime background, or the Nernst current in Dirac and Weyl semimetals — both current forms are equivalent by a “Weyl transformation”. We focus on a spatially homogeneous system of QCD hadron phase, which is expected to be created after the QCD phase transition and thermalization. We find that the EM field can induce a dynamic oscillatory dilaton field which in turn induces the scale anomalous current. As the phenomenological applications, we evaluate the dilepton and diphoton productions induced from the dynamic scale anomalous current, and find that those productions include a characteristic peak structure related to the dynamic oscillatory dilaton, which could be tested in heavy ion collisions. We also briefly discuss the out-of-equilibrium particle production created by a nonadiabatic dilaton oscillation, which happens in a way of the so-called tachyonic preheating mechanism.

show abstract

Real-time dynamics of axion particle production due to spontaneous decay of a coherent axion field

Cited by 6 publications

References 62 publications

Dynamic scale anomalous transport in QCD with electromagnetic background

Dynamic scale anomalous transport in QCD with electromagnetic background

CPT Symmetry in Two-Fold de Sitter Universe

Dynamic scale anomalous transport in QCD with electromagnetic background

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