Particle asymmetries from quantum statistics

Blinov, Nikita; Hook, Anson

doi:10.1103/physrevd.95.095014

Cited by 2 publications

(3 citation statements)

References 39 publications

(44 reference statements)

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“…In Ref. [189] we explored an alternative possibility where CP violation is completely sequestered from the other aspects of baryogenesis. We studied the scenario where a particle asymmetry is produced in a dark sector by an unspecified mechanism, leading to a population of an asymmetric, stable species, i.e.…”

Section: Mesogenesismentioning

confidence: 99%

New Ideas in Baryogenesis: A Snowmass White Paper

Elor¹,

Harz²,

Ipek³

et al. 2022

Preprint

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The Standard Model of Particle Physics cannot explain the observed baryon asymmetry of the Universe. This observation is a clear sign of new physics beyond the Standard Model. There have been many recent theoretical developments to address this question. Critically, many new physics models that generate the baryon asymmetry have a wide range of repercussions for many areas of theoretical and experimental particle physics. This white paper provides an overview of such recent theoretical developments with an emphasis on experimental testability. Model Key Ingredients Observable scale Observables Axiogenesis Axion misalignment, sphalerons axion scale ~ O( 10 8-11 GeV) axion mass ~ 𝜇eV Gravitational waves WR baryogenesis axion inflation, WR interactions with the inflaton LR symmetry breaking ~ O( 10 10 GeV) Gravitational waves QCD Baryogenesis Singlet scalar coupled to the gluon field strength,

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Section: Mesogenesismentioning

confidence: 99%

New Ideas in Baryogenesis: A Snowmass White Paper

Elor¹,

Harz²,

Ipek³

et al. 2022

Preprint

Self Cite

View full text Add to dashboard Cite

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“…Compared with the previous works [13,14,22,23], instead of assuming the non-zero PNA at the initial time, the PNA is created through interactions. These interactions have the following unique feature; namely, the interaction between the complex scalars and oscillating condensation of a neutral scalar leads to the PNA.…”

Section: Redshiftmentioning

confidence: 99%

“…For reviews of different types of models and mechanisms, see, for example, [8][9][10]. Recently, the variety of the method for the calculation of BAU has been also developed [11][12][13].…”

Section: Introductionmentioning

confidence: 99%

A New Mechanism for Generating Particle Number Asymmetry through Interactions

Morozumi

Nagao

Ádám

et al. 2019

Advances in High Energy Physics

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A new mechanism for generating particle number asymmetry (PNA) has been developed. This mechanism is realized with a Lagrangian including a complex scalar field and a neutral scalar field.The complex scalar carries U(1) charge which is associated with the PNA. It is written in terms of the condensation and Green's function, which is obtained with two-particle irreducible (2PI) closed time path (CTP) effective action (EA). In the spatially flat universe with a time-dependent scale factor, the time evolution of the PNA is computed. We start with an initial condition where only the condensation of the neutral scalar is non-zero. The initial condition for the fields is specified by a density operator parameterized by the temperature of the universe. With the above initial conditions, the PNA vanishes at the initial time and later it is generated through the interaction between the complex scalar and the condensation of the neutral scalar. We investigate the case that both the interaction and the expansion rate of the universe are small and include their effects up to the first order of the perturbation. The expanding universe causes the effects of the dilution of the PNA, freezing interaction and the redshift of the particle energy. As for the time dependence of the PNA, we found that PNA oscillates at the early time and it begins to dump at the later time. The period and the amplitude of the oscillation depend on the mass spectrum of the model, the temperature and the expansion rate of the universe.

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Particle asymmetries from quantum statistics

Cited by 2 publications

References 39 publications

New Ideas in Baryogenesis: A Snowmass White Paper

New Ideas in Baryogenesis: A Snowmass White Paper

A New Mechanism for Generating Particle Number Asymmetry through Interactions

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