Spontaneous baryogenesis from asymmetric inflaton

Takahashi, Fuminobu; Yamada, Masaki

doi:10.1016/j.physletb.2016.03.020

Cited by 18 publications

(12 citation statements)

References 46 publications

(45 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In general, after the inflation the Universe has experienced a thermalization era called reheating. The baryogenesis at this stage is investigated recently [3,4,5,6]. (See also Refs.…”

Section: Introductionmentioning

confidence: 99%

Leptogenesis via neutrino oscillation magic

Hamada

Kitano

Yin

2018

J. High Energ. Phys.

View full text Add to dashboard Cite

The possibility of generating the baryon asymmetry of the Universe via flavor oscillation in the early Universe is discussed. After the inflation, leptons are born in some states, travel in the medium, and are eventually projected onto flavor eigenstates due to the scattering via the Yukawa interactions. By using the Lagrangian of the Standard Model with the Majorana neutrino mass terms, llHH, we follow the time evolution of the density matrices of the leptons in this very first stage of the Universe and show that the CP violation in the flavor oscillation can explain the baryon asymmetry of the Universe. In the scenario where the reheating is caused by the decay of the inflaton into the Higgs bosons, the baryon asymmetry is generated by the CP phases in the Pontecorvo-Maki-Nakagawa-Sakata matrix and thus can be tested by the low energy neutrino experiments. arXiv:1807.06582v2 [hep-ph]

show abstract

“…In general, after the inflation the Universe has experienced a thermalization era called reheating. The baryogenesis at this stage is investigated recently [3,4,5,6]. (See also Refs.…”

Section: Introductionmentioning

confidence: 99%

Leptogenesis via neutrino oscillation magic

Hamada

Kitano

Yin

2018

J. High Energ. Phys.

View full text Add to dashboard Cite

show abstract

“…[72]. Note that in this paper we do not introduce a B − L violating operator associated with the righthanded neutrino, so that the net B − L asymmetry vanishes for this effect.…”

Section: Reheating Temperaturementioning

confidence: 95%

Affleck-Dine baryogenesis just after inflation

Yamada

2016

Phys. Rev. D

Self Cite

View full text Add to dashboard Cite

We propose a new scenario of Affleck-Dine baryogenesis where a flat direction in the MSSM generates B − L asymmetry just after the end of inflation. The resulting amount of baryon asymmetry is independent of low-energy supersymmetric models but is dependent on inflation models. We consider the hybrid and chaotic inflation models and find that reheating temperature is required to be higher than that in the conventional scenario of Affleck-Dine baryogenesis. In particular, nonthermal gravitino-overproduction problem is naturally avoided in the hybrid inflation model. Our results imply that Affleck-Dine baryogenesis can be realized in a broader range of supersymmetry and inflation models than expected in the literature.

show abstract

“…for the massive noninteracting scenario, and λ S 1.7 × 10 −16 (26) for the massless interacting scenario. As expected, these are stronger than the requirement that the observable universe be contained within a domain of the same sign.…”

Section: Domain Size and Baryonic Isocurvature Constraintmentioning

confidence: 99%

Leptogenesis via the 750 GeV pseudoscalar

2016

View full text Add to dashboard Cite

Recently the ATLAS and CMS collaborations have reported evidence of a diphoton excess which may be interpreted as a pseudoscalar boson S with a mass around 750 GeV. To explain the diphoton excess, such a boson is coupled to the Standard Model gauge fields via SFF operators. In this work, we consider the implications of this state for early universe cosmology; in particular, the S field can acquire a large vacuum expectation value due to quantum fluctuations during inflation. During reheating, it then relaxes to its equilibrium value, during which time the same operators introduced to explain the diphoton excess induce a nonzero chemical potential for baryon and lepton number. Interactions such as those involving right-handed neutrinos allow the system to develop a non-zero lepton number, and therefore, this state may also be responsible for the observed cosmological matter-antimatter asymmetry.

show abstract

Spontaneous baryogenesis from asymmetric inflaton

Cited by 18 publications

References 46 publications

Leptogenesis via neutrino oscillation magic

Leptogenesis via neutrino oscillation magic

Affleck-Dine baryogenesis just after inflation

Leptogenesis via the 750 GeV pseudoscalar

Contact Info

Product

Resources

About