Direct baryogenesis in the broken phase

Asaka, Takashi; Ishida, Hiroyuki; Yin, Wen

doi:10.1007/jhep07(2020)174

Cited by 20 publications

(13 citation statements)

References 51 publications

(54 reference statements)

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“…To avoid the proton decays, one can introduce a Z 2 symmetry under which SM leptons are odd but the baryons are even or vise versa. In this case, the baryon asymmetry may be correctly obtained from neutrino oscillation with the higher dimensional term (3.24) [84,85] and also the quark oscillation could be important via the baryon-number-violating but baryon-parity-conserving operator [86]. Lastly, let us mention the confinement of SO(N ).…”

Section: 3 Cosmologymentioning

confidence: 93%

Scale and quality of Peccei-Quinn symmetry and weak gravity conjectures

Yin

2020

J. High Energ. Phys.

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The promising solution to the strong CP problem by a Peccei-Quinn (PQ) symmetry may introduce quality and hierarchy problems, which are both relevant to Planck physics. In this paper, we study whether both problems can be explained by introducing a simple hidden gauge group which satisfies the WGC or its variant. As a concrete example, we point out that a weakly-coupled hidden SU(N ) gauge symmetry, which is broken down to SO(N ), can do this job in the context of a Tower/sub-Lattice WGC. Cosmology is discussed.

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Section: 3 Cosmologymentioning

confidence: 93%

Scale and quality of Peccei-Quinn symmetry and weak gravity conjectures

Yin

2020

J. High Energ. Phys.

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“…It is also clear that the baryogenesis model can be built from CP-violating decay of the produced heavy particle due to the bubble expansion. This is nothing but the non-thermal baryogenesis[22][23][24][25][26][27][28][29][30][31][32][33][34]. In the models in this paper, this component of the asymmetry production is negligible.…”

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confidence: 88%

Baryogenesis via relativistic bubble walls

Azatov

Vanvlasselaer

Yin

2021

J. High Energ. Phys.

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We present a novel mechanism which leads to the baryon asymmetry generation during the strong first order phase transition. If the bubble wall propagates with ultra-relativistic velocity, it has been shown [1] that it can produce states much heavier than the scale of the transition and that those states are then out of equilibrium. In this paper, we show that this production mechanism can also induce CP-violation at one-loop level. We calculate those CP violating effects during the heavy particle production and show, that combined with baryon number violating interactions, those can lead to successful baryogenesis. Two models based on this mechanism are constructed and their phenomenology is discussed. Stochastic gravitational wave signals turn out to be generic signatures of this type of models.

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“…This is hotter than the warm DM of the same mass and obtain a more stringent bound from Lyman-α [59]. This reheating may be caused by the inflaton decay, in which case we can obtain the correct baryon asymmetry if the inflaton decays into energetic quarks [77] which are thermalized after a few flavor oscillations [78,79]. In this case, the baryon number needs to be violated via higher dimensional operators which preserve a baryon parity to stabilize the proton.…”

Section: Dm Productionmentioning

confidence: 99%

Phenomenology of CP-even ALP

Sakurai,

Yin

2021

Preprint

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Axion or axion-like particle (ALP) has been usually considered as a CP-odd Nambu-Goldstone boson (NGB) from the spontaneous breakdown of a global U(1) symmetry. In this paper, we point out that the NGB behaves as a CP-even particle coupled to the SM particles in a large class of simple (or perhaps the simplest) renormalizable models. We provide a first study of the collider phenomenology and cosmology of the CP-even ALP. In a natural parameter region, the CP-even ALP can be produced from the Higgs boson decay in colliders. When the mass is not very light, the signals will be Higgs exotic decays, Higgs decay to displaced vertex ×2, Higgs decay to displaced vertex + missing energy. The signal can be discriminated from other models, e.g. hidden photon, by measuring the decay length and the decay products of the light new particle. In addition, when m a MeV, in which case the Higgs boson invisible decay may be probed in the colliders, the CP-even ALP is a nice Dark matter (DM) candidate. The DM can be probed by 21cm line measurement, the future measurement of the Milky way mass halo function in the Vera Rubin Observatory, as well as X-or γ-ray observations. The DM production mechanisms are discussed.

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Direct baryogenesis in the broken phase

Cited by 20 publications

References 51 publications

Scale and quality of Peccei-Quinn symmetry and weak gravity conjectures

Scale and quality of Peccei-Quinn symmetry and weak gravity conjectures

Baryogenesis via relativistic bubble walls

Phenomenology of CP-even ALP

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