Baryogenesis from the weak scale to the grand unification scale

Bodeker, Dietrich; Buchmuller, Wilfried

doi:10.48550/arxiv.2009.07294

Cited by 21 publications

(35 citation statements)

References 255 publications

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“…Within a non-minimal supersymmetric model, like the NMSSM, an allowed region still survives [57,58] and also in a two Higgs doublet model only special solutions are found within the full parameter space [59]. However, the recent improved result from the ACME experiment on the electron dipole moment of the electron [60] essentially rule out this possibility (see a recent discussion in [20]).…”

Section: Electroweak Baryogenesismentioning

confidence: 99%

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On the origin of matter in the Universe

Di Bari

2021

Preprint

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The understanding of the physical processes that lead to the origin of matter in the early Universe, creating both an excess of matter over anti-matter that survived until the present and a dark matter component, is one of the most fascinating challenges in modern science. The problem cannot be addressed within our current description of fundamental physics and, therefore, it currently provides a very strong evidence of new physics. Solutions can either reside in a modification of the standard model of elementary particle physics or in a modification of the way we describe gravity, based on general relativity, or at the interface of both. We will mainly discuss the first class of solutions. Traditionally, models that separately explain either the matter-antimatter asymmetry of the Universe or dark matter have been proposed. However, in the last years there has also been an accreted interest and intense activity on scenarios able to provide a unified picture of the origin of matter in the early universe. In this review we discuss some of the main ideas emphasising primarily those models that have more chances to be experimentally tested during next years. Moreover, after a general discussion, we will focus on extensions of the standard model that can also address neutrino masses and mixing, since this is currently the only evidence of physics beyond the standard model coming directly from particle physics and it is, therefore, reasonable they might also provide a solution to the problem of the origin of matter in the universe.

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Section: Electroweak Baryogenesismentioning

confidence: 99%

“…-It does not provide a candidate of cold dark matter. 20 -There is no mechanism of baryogenesis provided by the minimally extended standard model and electroweak baryogenesis would continue not to work as in the SM, since the Higgs sector is untouched.…”

Section: Minimally Extended Standard Modelmentioning

confidence: 99%

On the origin of matter in the Universe

Di Bari

2021

Preprint

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“…Leptogenesis [1][2][3][4][5][6][7] is a simple mechanism to explain the observed baryon asymmetry of the universe [8]. The right handed (RH) heavy neutrinos which are introduced in the Standard Model (SM) to generate light neutrino masses (Type-I seesaw), decay CP asymmetrically to create lepton asymmetry which is then converted to baryon asymmetry via Sphaleron transition [9].…”

Section: Introductionmentioning

confidence: 99%

Probing Leptogenesis and Pre-BBN Universe with Gravitational Waves Spectral Shapes

Samanta,

Datta

2021

Preprint

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On the frequency-amplitude plane, Gravitational Waves (GWs) from cosmic strings show a flat plateau at higher frequencies due to the string loop dynamics in standard radiation dominated post-inflationary epoch. The spectrum may show an abrupt upward or a downward trend beyond a turning point frequency f * , if the primordial dark age prior to the Big Bang Nucleosynthesis (BBN), exhibits non-standard cosmic histories. We argue that such a spectral break followed by a rising GW amplitude which is a consequence of a postinflationary equation of state (ω > 1/3) stiffer than the radiation (ω = 1/3), could also be a strong hint of a leptogenesis in the seesaw model of neutrino masses. Dynamical generation of the right handed (RH) neutrino masses by a gauged U (1) symmetry breaking leads to the formation of a network of cosmic strings which emits stochastic GWs. A gravitational interaction of the lepton current by an operator of the form ∂ µ Rj µ -which can be generated in the seesaw model at the two-loop level through RH neutrino mediation, naturally seeks a stiffer equation of state to efficiently produce baryon asymmetry proportional to 1 − 3ω.We discuss how GWs with reasonably strong amplitudes complemented by a neutrino-less double beta decay signal could probe the onset of the most recent radiation domination and lightest RH neutrino mass at the intermediate scales.

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“…Within the Standard Model (SM), both the electroweak and QCD phase transitions are cross-over [1][2][3]. Beyond the SM (BSM), first-order phase transitions (FOPTs) are ubiquitous including in models with extension of the Higgs sector for electroweak baryogenesis [4,5] and dark QCD-like confinement to explain dark matter properties [6][7][8] (i.e., changing dark matter abundance from bubble dynamics [9][10][11][12]). Other than leaving imprints in dark matter, FOPT can also generate observable stochastic gravitational waves if it is a strong one and affect big bang nucleosynthesis (BBN) or cosmic microwave background (CMB) physics if the phase transition temperature is low.…”

Section: Introductionmentioning

confidence: 99%

Cosmological Constraints on First-Order Phase Transitions

Bai,

Korwar

2021

Preprint

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First-order phase transitions exist in many models beyond the Standard Model and can generate detectable stochastic gravitational waves for a strong one. Using the cosmological observables in big bang nucleosynthesis and cosmic microwave background, we derive constraints on the phase transition temperature and strength parameter in a model-independent way. For a strong phase transition, we find that the phase transition temperature should be above around 2 MeV for both reheating photon and neutrino cases. For a weak one with the temperature below 1 MeV, the phase transition strength parameter is constrained to be smaller than around 0.1. Implications for using a first-order phase transition to explain the NANOGrav observed gravitational wave signal are also discussed.

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Baryogenesis from the weak scale to the grand unification scale

Cited by 21 publications

References 255 publications

On the origin of matter in the Universe

On the origin of matter in the Universe

Probing Leptogenesis and Pre-BBN Universe with Gravitational Waves Spectral Shapes

Cosmological Constraints on First-Order Phase Transitions

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